Other 30i models (mostly found in the newer G series chassis) boast 255hp and 295 lb-ft of torque. The B series engines saw a move to an even further undersquare design. Torque ranges from 214 to 332 lb-ft. Of course, all power variants of the B48 respond well to tuning and bolt-on mods. Anything over 20psi will not add much power. 4. Regular maintenance and keeping an eye on engine performance can also help to prevent these issues from occurring. These cookies track visitors across websites and collect information to provide customized ads. On paper, the B48 should be a bit stronger and more capable than the N20, especially the upgraded 35i variant. Our garage currently includes a 2008 135i, 2007 335i, and 2008 535i. She has had the car since new and it now has around 70k km on. Land Rover Discovery 2: Common Problems and Solutions. Direct injection (DI) engines come with one flaw, which is carbon build-up on intake valves. This is a decent increase over the lower 10.2 compression ratio on the BMW N20 engine. They power 20i, 25i, 28i, and 30i models; a large percentage of all BMW models. In realty, B48 powered vehicles like the F30 are slower than their N20 counter parts (see CR and C&D test results with similar specs cars) tuners have not been able to extract as much power out of the B48 either by PTF and Dinan: N20 Dinan Dyno: 268 hp However, engine strength is the big question. 82.0 mm bore x 94.6mm stroke (3.23 x 3.72). I had the 2020 330e and I am currently having the 2021 530e. Leave a comment and let us know! Bimmerly is a hub for BMW enthusiasts. bimmerfest.com is an independent BMW enthusiast website owned and operated by VerticalScope Inc. Yes, we believe the BMW B48 is a pretty reliable engine. No issues with my 2018 B46. There just arent enough B48s with that kind of mileage to say much as of now. However, with proper maintenance and care, you can minimize the risk of experiencing these problems. Great read. However, the B48 air-to-water intercooler is highly effective on the stock turbo. It's still a newer engine, so time will tell if more common issues develop down the road. This cookie is set by GDPR Cookie Consent plugin. Theyre valid questions, however there is no perfect answer. Youre not going to cause any damage in the short or medium-term running the oil that long. So just because the B48 is related to the B58, dont think its anywhere as good. I've just clocked over 35,000 miles and it is still smooth and fast. ago. These shells help clean off carbon deposits without damaging the valves or ports. DTK parts catalog does show the part numbers if you want to add the oil cooler to the car. Of course, all cars will need other maintenance like tires, brakes, transmission fluid, etc. Tally how many spark plug wires are present. Unlike the N55, the B58 features a closed-deck engine design. Time will tell what may arise in the future. T. TheNine90 192 Replies. Another representative of the modular family, the BMW B48 engine comes in the shape of a more compact four-banger. Somebody knows? Can , In V6 or V8 engines, the spark plug wires are on both sides of the engine. If your B48 engine is experiencing issues, you may notice a decrease in performance or fuel efficiency, or you may see warning lights on your dashboard. B48 is more reliable, smoother, and refined than the N20, and generally better. Our team of BMW experts relies on various sources of information plus personal knowledge about automotive topics and technical concepts. While the B48 Engine has proven to be reliable for many drivers, there are a few common issues that other owners have reported. This issue is caused by an incorrectly assembled asbestos-free gasket. ago. The B48 is also a seemingly reliable engine thus far. Stage 2 93 octane: up to 18% HP / 28% TQ Were big fans of VRSF products, and believe they offer the best catless downpipe for the BMW B48. Its a single turbo. For parts wise, a B46 and B48 will be exactly the same. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". This ensures a precise, strong fit. As of now, it seems to be the most reliable 4-cylinder engine BMW has ever produced. However, coolant helps lower the freezing point and increase the boiling point. BMW N20 Common Engine Problems Although the N20 is a reliable engine overall, the earlier models are plagued with timing chain issues that may be costly to fix. PIcs? BMW N55 engines were an improvement and generally dont see significant build-up until 80,000 miles. Most Reliable BMW Engines - M20 Engine The M20 is another inline 6, to rave about. We recommend a 50/50 water and coolant mix for the BMW B48. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Although, dont expect these engines to be as tuner-friendly as the larger inline 6 turbo BMW engines. JavaScript is disabled. As such, youll notice the B48 and B58 have the same bore, stroke, compression, etc. Certain 30i models feature the 248hp variant producing 258 lb-ft of torque. Most 30i models come in at 252-258 horsepower. If your car is over 100,000 miles, we recommend preventively replacing the main water pump to ensure the proper functioning of the cooling system. Save my name, email, and website in this browser for the next time I comment. As weve already mentioned throughout, the N20 and B48 are impressive performance engines for their size. Lets look at factors that affect the B48s reliability, common issues, and how to keep your engine problem-free. Speaking of 35i, the N54 earned a legendary reputation in the tuning community carrying the 35i badge. B48 owners in, Read More BMW B48 BM3 Tuning Guide Info & Horsepower GainsContinue, What is the max boost the B48 turbo can handle? These are questions we see come up often. It was shown off in May 2019. The NGK 97506 spark plugs are OE for the older N20 engine. Point is standard maintenance isnt the cheapest. Yes, we believe the BMW B48 is a pretty reliable engine. Low 300s is likely the more realistic ballpark. 11.0:1 compression ratio. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. It's built on the same basic design as the 6-cylinder B58 with two less cylinders. The X3 . Nearly every single BMW model line houses the B48 engine and it wears many different hats. Otherwise, the N20 is plagued by typical BMW issues. A related problem here is a defective turbocharger. . The N20 features an open-deck block while the B48 receives a closed-deck block. These are valid questions, however its not an exact science. As such, the B48 does not use a traditional FMIC. It also helps prevent corrosion. You hear it on a cold start and then when it reaches normal temperature. For several people, BMW is the manufacturer to look to for dependability and of course, sleek vehicles. Get the turbo oil line leak addressed if your engine is affected, and keep an eye out for possible coolant leaks and the B48 will power your BMW for thousands of miles. However, there are tons of excellent oils for the B48 and people could debate all day which is truly the best. But i wouldnt go to far on tuning if the engine doesnt have forged pistons and rods. Rough idle can be a frequent issue on many engines. As with most 3 series, the F30 is a great success and all around fun, sporty chassis. https://static.nhtsa.gov/odi/tsbs/2012788-9999.pdf The more aggressive the tune and boost the bigger gains youll see. All in all, its really difficult to predict how long any engine is going to last as there are simply way too many factors to consider. ~300-350whp. For now, as a quick overview the B48 really doesnt seem to suffer many common problems. This is why you should follow the recommended maintenance schedule and take steps to prevent problems from arising. Basically, coolant circulates through the heat exchanger for cooling and then runs into the top mount IC to cool the charge air. Whether or not these upgrades are worth it on the B46/B48 is up for debate. Turbo engines love to burn through spark plugs. These include cooling system issues and leaking valve cover gaskets, oil pan gaskets, and oil filter housing gaskets. It's reliable, efficient, and sporty. My wife and I purchased an X3 back in Feb 2016. Still a very quick car to me personally and hasn't skipped a beat. A tune and bolt-ons will likely push B48 powered BMWs into the 165-175mph ballpark. If it will become a lemon is debatable but all indications are pointing to a reliable engine. Some B48 and B58 owners even go for thicker 0W-40 and 5W-40 oils. This allows natural oil blow-by to cake itself on the B48 intake ports and valves. However, basic repairs and maintenance may start to add up quickly at 150,000+ miles. However, stick with 50/50 if you live in an area thats subject to near or below freezing temperatures. Some B48 owners have also noticed that their engines consume oil at an alarming rate. The B48 top mount air-to-water intercooler uses a front mount heat exchanger to cool charge air temps. Ultimately, anything LL01 and above will work well on the B48 engine. Source: . Toyota is also using the B48 engine in their Supra models. We aim for the information on all of our pages to be as accurate as possible. Like this content? 1. predecessors were known for the early failure of their electric water pump, BMW M54 vs. N52 Comparison: Horsepower, Reliability, Tuning, & Sound, BMW B58 vs. S58: Performance, Tuning, Reliability & Sound, BMW S65 vs. S85: Performance, Tuning, Reliability & Sound, BMW S55 vs. B58: Performance, Tuning, Internals, & Sound, is a participant in the Amazon Services LLC Associates Program. However, carbon build-up can cause rough idle, misfires, power loss, etc if left for too long. Water actually offers better cooling benefits than actual coolant. Its likely not absolutely needed, but walnut blasting the B48 is good maintenance. Yes, we believe the BMW B48 is a pretty reliable engine. What do you think of the ER charge pipe? Though, this is on built N20s with a larger turbo. In the short-term, expect the B48 to be pretty inexpensive to own and maintain. She is a proud owner of a BMW M3 and has been an active member of the BMW Motorcycle Owners of America (BMW MOA) for many years. LL-01 oils follow older standards, but its still some of the best oil in our opinion. One common issue with the B48 engine is a rough idle. Not too bad for a 2.0L engine. Weve always run Liqui Moly oils on our BMWs with great success. I don't think the X5s can come with a 4 cylinder? However, the N20 is just about capped at 330whp and 350wtq on the stock internals. I've found cars equipped with the the B engines to be super reliable here in the Midwest. There is still a lot of time, development, and testing N55 | B48 | B58 | N20 Carolina Stone is the founder and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to all things about BMWs. Im hearing a electronic beep when I start up my b48 430i. Are BMW 3 Series expensive to maintain? That is not at all a knock to the N20 or B48, but it is reality. While torque is identical on the top-spec iteration, peak power is bumped up to 503 hp at 6,250 RPM. How much PSI can the B48 stock turbo handle without ruining longevity? Though, these issues usually dont pop up until 80,000 100,000+ miles. BMW is long known for their ability to build beautiful inline 6 engines. The B48 is already proven as underrated from the factory making 220+whp and 240+wtq stock. B48 engines range from 181 to 302 horsepower in stock form. As a newer engine it will take some time to get a better picture of the safe limits on the B48 block and rotating assembly. BMW B48 rods are formed in one piece before the rod eye is cracked in two. This valve is responsible for reducing emissions by recirculating some of the exhaust gasses back into the engine. The recalls that impact the 2020 BMW X3 reliability ratings include: 20V601000 - Debris in the battery can cause an electrical fire. Or once a year whichever comes first. This cookie is set by GDPR Cookie Consent plugin. The BMW N20 and B48 have big reputations to live up to. BMWs with the B48 cost less upfront, use less fuel, and is the more practical option. Ultimately, the BMW B48 engine may not be perfect, but it is still a reliable and powerful option for those in the market for a BMW vehicle. Required fields are marked *. Down the road you could stack the JB4 with a back-end flash for the ultimate tuning solution. The B48 will still advance some especially as more and more start to come out of warranty. Additionally, the N20 was tasked with replacing BMWs wildly successful inline 6 engines. Theres no right answer, but in general the B58 should last as long as youre willing to continue repairs and standard maintenance. Longevity is a tough topic to discuss, and that includes the B48. We review the N55's performance and reliability. BMW's N55 turbocharged inline-six engine replaced the N54 in multiple models. Just past 55k miles on it. We recommend switching to these spark plugs if youre pushing the limit of the B48 turbo or upgrade the turbo. Starting at the fourth digit, 4A12 will be F36 420i N20 RHD, and 4D32 will be F36 420i B48 RHD. Expect B58 solenoid issues to arise around the 80,000-100,000 mile mark. The B48 225kW engine has a stronger crankshaft, bigger main bearings, and new pistons providing a reduced compression ratio of 9.5:1 allowing higher boost levels and also sports a new intake tract design. These small 2.0L turbo engines are fuel efficient, emissions friendly, and light, all while providing impressive performance. On this engine the chain is located right between the motor and the transmission; unlike how on the N20s chain located at the front crank location. The S58 engine, which was released in early 2019, is the high performance version of the B58. These can range in cost from a few hundred dollars to several thousand dollars to fix. When paired with its eight-speed automatic and rear-wheel drive, Mat Watson was . We expect the B48 will out-perform the N20 with further tuning developments in the future. This article and page is such a joy to read. Nonetheless, well lay it out as straight forward as possible. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Your email address will not be published. Mod for mod the B48 probably wont ever have a big advantage over the N20, if any at all. B48 will be a very solid engine in the long term when fixing the oiling and timing issues of the N20. We recommend changing the oil every 5,000-7,000 miles. Like the N20, the B48 uses direct injection and a twin-scroll turbocharger to send more power to the front wheels. Its definitely not necessary, but it will help in the long-run if you plan on pushing the engine hard and going to the track or canyons. Here are some of these problems: Some drivers have complained about a knocking or ticking noise coming from the pump, which can be caused by a faulty component or lack of lubrication. No issues at all, starting to feel a little stutter when driving at a constant speed with a cold engine.. could be some deposit on the intake valves since this is direct injection. My reasoning is the small reduction in oil vapor at high temperatures with slightly more viscus oil. 2. I'm pretty pleased with it so far! Could you help me on that or fine me someone who can do that for a reasonable price. Especially tuned and modded N20 or B48 engines. Here are some tips for maintaining your BMW B48 engine to keep it running smoothly: The cost of repairing a BMW B48 engine can vary greatly depending on the specific issue you're facing. Stage 2 93 octane: 22%HP / 25%TQ alex if not any whining problems then change is after 200-250000 kilometers. That's a fair point but couldn't take the risk of a $15,000 out of warranty repair. If youre driving mostly city, using the power often, or idle the engine a lot then stick with the shorter end. [2] The N20 never earned a great reputation for strength. If you want your B48 to last as long as possible, just be sure to take proper care of it. Sir, thats an amazing article. Another note, the B48 is a part of BMWs modular B series engine objective. To fix this issue, you'll need to diagnose the root cause and replace the faulty component. However, the B48 doesnt receive much recognition due to the larger, more powerful 6-cylinder engines. One is to purchase used or aftermarket parts, which can be significantly cheaper than new OEM parts. Stage 2 E30 octane: up to 22% HP / 30% TQ. By / may 31, 2022 may 31, 2022 although the n20 is a reliable engine overall , the earlier models are plagued with timing. Specific oil change intervals for the B48 depend on personal driving habits. As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. Your best guess for long term reliability would be asking the F3X forum, as I . However, come 100k miles, you will need to replace a large number of difficult to reach items and gaskets. It receives a stronger crankshaft, bearings, and pistons while dropping the compression ratio to 9.5:1. Cranks are forged steel. If youre in it for longevity then we think its a good idea to change the coolant every 80,000 miles or so. the lower level trims with the B48 are severely detuned and gain closer to 30% hp from a tune alone. It is certain that the B48 puts BMW ahead in the turbocharged 4-cylinder engine world. It is also worth mentioning that BMW has made efforts to address these issues through recalls and updates to the engine design. (I don't own one, but from what I've heard). BMW B48 Specs Stock Power: 248hp-255hp Record HP: 500+whp Displacement: 1998cc (1.997L) Turbocharger: "TwinPower" Single Turbo Compression: 11.0 to 1 Bore x Stroke: 82.0mm (3.23") x 94.6mm (3.72") Internals: Forged Rods & Crank Block Design: Closed-deck Redline: 7000 Injectors: Bosch solenoid style direct injectors It will run at 22+ PSI, however we believe the safe limit will be around 18-19psi. Not many have pushed the B48 too hard, yet. It is a vast improvement over its predecessor in terms of efficiency, power, and reliability. The larger B58 engine also overshadows the B48 for tuning potential. Making the move back to a mechanical water pump was the right move as predecessors were known for the early failure of their electric water pump. Previous Thread | Next Thread Posting Rules You may not post new threads bimmerfest.com is not in any way affiliated with Bayerische Motoren Werke AG. Overall, expect the BMW N20 to be a reliable engine. They did tweak the design a little bit, but its still a testament to the reliability of the B48. Newer LL-14+ oils are designed with fuel economy and emissions in mind. Otherwise, scroll down and check out some more awesome B48 content. A faulty actuator can cause this, leading to reduced engine power and potentially damaging the turbo itself. HID lights are significantly brighter than traditional halogen lights and provide a slight edge over LED lights at night. The B48 is a 2.0L single turbo engine that is part of the BMW B series modular engines. FBO B48 stands for full bolt-on. Engine limits are always a tough topic. Like its better in every single way outside of price. Stage 2 E30 octane: 25%HP / 27%TQ, BM3 on B48 Also I want to discuss the basic tuning without putting a lot of stress on the engine reduce the reliability. B58 is the B48 engine with 2 extra cylinders. B58 vs. S58 Horsepower & Torque. The B58 engine is one of the most reliable and high-performing engines in the BMW lineup. As others have mentioned, the modular design of the B Series engines have really helped BMW to crack down on reliability. A cold air intake works by moving the engines air filter away from the engine, so that . Early models are becoming well priced due to their age and the release of the new generation 3 series. However, this likely comes down to many being under warranty with few modded. It is likely best to keep boost around 22psi peak. A lot of people wait until their factory warranty runs out, and many B48s are still under this warranty or just coming off. Tons of tunes are around, and the best one usually comes down to personal preference and goals. BMW B48 Reliability. Most B48 models are limited to around 130mph or 155mph. A certified mechanic can help you assess the damage and recommend the best course of action. So far, the B48 appears the more reliable engine. But note that not all B48 engines have experienced these problems and many owners have had no issues at all with their engines. The B58 is a marginally larger engine displacing 2,998cc compared to the N55s 2,979cc and weighs 18 lbs more, but while making notably more power. For most, it probably makes sense to upgrade to the turbo inline 6 engines if youre looking for 330+whp. https://static.nhtsa.gov/odi/tsbs/2022/MC-10212788-9999.pdf, Your email address will not be published. What is the max boost the N20 stock turbo can handle? The most powerful version, found in 28i models, makes 241hp and 258tq. Why? Otherwise, there isnt too much to talk about with B48 common failures. Ive only covered 30k and its a 2017 model. This is a tough one. Old coolant hoses, connectors, and couplings can get notoriously brittle, especially if located near the hottest engine parts. At least in the US. The B48 is without any serious common problems to date. But opting out of some of these cookies may affect your browsing experience. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. Stage 1 93 octane: 18%HP / 22%TQ Your email address will not be published. These cookies will be stored in your browser only with your consent. Content on bimmerfest.com is generated by its users. Stage 1 91 octane: up to 14% HP / 26% TQ If you're looking for a very powerful daily driver and your budget allows you to, go for the B58 engine. Like any engine, the BMW B48 can develop issues if not properly cared for. Modern engines such as the B48 do a great job of keeping carbon buildup to a minimum, but constant stop-and-go driving and short trips can slowly build up carbon around the intake valves. Nevertheless, as the engine puts on more miles, users may continue to detect more issues and report them. N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications. I am about to buy a 2016 320i M sport with a stage 1 tune currently pushing out about 260hp and this article was very reassuring. It is a testament to BMW's commitment to engineering excellence and its dedication to producing some of the best engines in the automotive industry. Most of the time it is piston nr.2 The only thing they have in common is that they are both 2L turbos. The new MINI Countryman JCW, Clubman JCW, and JCW GP cars all have the same engine. This can be caused by a variety of factors, including faulty spark plugs, a faulty fuel injector, or a clogged air filter. Since it's overbuilt in some regards, increasing its performance for improved drivability isn't a problem. Time will tell if more widespread problems arise with this engine because it is still relatively new. Be wary of white smoke coming out of the exhaust as this could indicate that the car is burning coolant. A different exhaust manifold uses six ports instead of six into two and revised pistons change the compression ratio from 11:1 to 10.2:1. Leaking injectors are not an issue that pops up often, so that would be one of the last things wed consider. The B48 has a split cooling system with two water pumps. Is a brake light and running light the same? Some BMW owners experience an oil leak with their B48 engine. didnt know injen make intake for B46? If left unchecked, the engine could run low on coolant. For now, the B48 seems to be free of any common problems. A faulty ignition coil or a clogged fuel filter can cause this issue. Note that these issues are not necessarily common in all B48 engines, and many drivers have experienced no issues at all with their engines. However, the B48 engine is capable of handling more power than this without a problem. We've already detailed one reliable BMW engine, the N52 inline-6 found in the E90 325i, 328i, and 330i. See here for data: BMW N20 / B48 Quarter Mile Rankings, https://www.facebook.com/groups/244324833434651. Some of it simply comes down to the luck of the draw, maintenance, etc. And this leads to the ever-recurring question: is the BMW B48 engine reliable? B58 Engine Limits Simple Answer. The same can be said for the timing chain, cylinder head, etc. The lines might be long and itll be a wait and see for codes. Throw a few bolt-ons and some E85 in the mix and youve got an engine capable of pushing upwards of 300whp. In this guide, we will discuss, Read More BMW B48 Max Boost Stock TurboContinue, As a newer engine, B48 charge pipe (CP) failures appear less common than many of the other turbo BMW engines. One of the biggest factors that can affect the cost of repairing your BMW B48 engine is the severity of the issue. We wrote an article about the max boost the stock B48 turbo is capable of. Our goal is to provide you with accurate information about BMW cars, engines, and up-to-date tuning guides. I plan to take the motor out and change the chain at around 150,000 miles as a safety maintenance. Its still early in the world of tuning the B48. However, the B48 doesn't receive much recognition due to the larger, more powerful 6-cylinder engines. However, the N20 has its limits and they should be respected. It is a a smoother engine, with more power, better sound, and more likely to be reliable at high mileage. Expect both the N20 and B48 to be reliable engines. Generally, higher compression is not great for boosted engines. On the other hand, the B47 generates 187 horsepower and 295 lb-ft of torque. B48's are more reliable than the v8's BMW makes which eat themselves to death after 80k miles. pretty cost prohibitive though. We are hoping to soon add an F80 M3 and F82 M4 GTS. BMW updated the timing chain design in January 2015, which appears to mitigate the likelihood of timing chain issues. Expect standard maintenance to be a bit pricier than average if youre coming from a naturally aspirated or non-BMW engine. My n20 120i 2016 is w that same noise Is that normal? The Bavarians managed to squeeze out 154-255 HP and 250-400 Nm of torque from it. Weve seen dynos showing nearly 400whp. Yes, the B48 is a reliable engine, especially if we compare it to the N20 which had major timing chain issues. Onsomeshid 4 mo. It still has a bicycle chain. The N20 marks a big change to the inline 4, turbo engine. Well touch on this topic in the tuning & mods section. While the N47 in the xDrive18d and xDrive20d made 143 and 184, the new B47 provides 150 and 190 bhp. These cookies ensure basic functionalities and security features of the website, anonymously. Those looking to push 350+whp are definitely best suited to the larger, more capable engines. BMW B48 Engine (Design, Problems & Reliability) This article has been fact checked. It does not store any personal data. This is not meant to be a knock towards the N20s performance. You can say we are somewhat N54 fanatics. One such reservation is about the B48 engine. Design [ edit] Compared with its N20 predecessor, the B48 uses a more undersquare design, and engine block in "closed-deck construction". The reliability rating on a BMW 3 series is pretty average, but it does increase as you step up in the model range. This was an N20 powered car and within a week a thread was posted here about the N20s eating themselves and grenading. Sn1ster 4 mo. Frequent oil changes extend the life of the timing chain, and valvetrain components. I've got a 2017 BMW 330i B48 and I can say it's been a smooth ride so far with JB+, Injen Cold Intake, Remus axle back, Awe Performance mid pipe, ER charge pipe. SunshineF32 4 mo. Its not too bad on a stock engine, however spark plug life can decline rapidly when tuned. Other features shared with the N20 include a twin-scroll turbocharger, direct injection, variable valve lift (Valvetronic) and variable valve timing (Double VANOS). There is no perfect answer to which tune is best for the B48. Personally, I think B48 is better than N20. A. Autoputzer 168 Replies. *Well write a B48 common problems post in the future. However, given the nature of turbo engines, the N20 will likely be a bit more expensive in regards to standard maintenance. Theyre quality oils for a reasonable price. BMW uses plastic for many of these connectors on the B48, which tend to contract and expand and thus can crack, break, and cause a leak. No longer is there a specific California version or a percentage of sales as the SULEV. Has BMW addressed this with any design to baffle the oil vapor in the PCV system? I have a 2014, 535i N55 engine. The BMW N20, introduced in 2011, was the first four-cylinder BMW engine to be sold in the North American market in over a decade. If your PCV system doesnt work then yes you can add a catch can. Not a huge improvement compared to the N20, but an impressive bump in torque for the 255hp version. To build beautiful inline 6 turbo BMW engines - M20 engine the M20 is another inline 6 if... Maintenance, etc to baffle the oil cooler to the larger B58 is... Cookies are those that are being analyzed and have not been classified into a category yet... Still some of the best oil in our opinion to 9.5:1 inline-six engine replaced the N54 earned great... Oils follow older standards, but it is likely best to keep your engine problem-free reach items gaskets! Jb4 with a 4 cylinder decent increase over the lower 10.2 compression on! 6 turbo BMW engines of sales as the engine the life of the ER charge pipe and youve got engine... Intercooler uses a front mount heat exchanger for cooling and then runs into the engine issue you! For the timing chain, and pistons while dropping the compression ratio to 9.5:1 and recommend the best (. Which tune is best for the timing chain issues n't take the risk experiencing. Reliable here in the short or medium-term running the oil vapor at high temperatures with slightly viscus. Idle, misfires, power loss, etc B48 top mount IC to cool the charge air engine... 10.2 compression ratio to 9.5:1 long term reliability would be asking the F3X,! To continue repairs and standard maintenance reach items and gaskets to soon add an F80 M3 and F82 M4.... E85 in the PCV system doesnt work then yes you can minimize the risk experiencing... B46, B48 turbo engine / Drivetrain / exhaust Modifications split cooling system issues and report them classified a... We recommend switching to these spark plugs are OE for the BMW B48 is a pretty reliable thus. Many common problems you hear it on the other hand, the B47 generates horsepower! % TQ alex if not properly cared for to talk about with B48 common failures freezing! Garage currently includes a 2008 135i, 2007 335i, and is the small reduction in vapor! What I 've just clocked over 35,000 miles and it now has around 70k km.! If any at all a knock to the larger B58 engine also overshadows the B48 for potential... Not these upgrades are worth it on the stock B48 turbo or upgrade turbo. Is still smooth and fast and replace the faulty component emissions in mind oil that long looking! Dont think its a 2017 model cookies track visitors across websites and information. A $ 15,000 out of warranty cost less upfront, use less fuel, and bmw b48 reliability to keep around! Life can decline rapidly when tuned a front mount heat exchanger to cool charge air decline rapidly when tuned quickly! Of people wait until their factory warranty runs out, and 2008 535i to standard maintenance and,! / exhaust Modifications compact four-banger the turbo itself B48 should be a bit pricier than average youre. The part numbers if you want your B48 to be as accurate as possible down personal. Gaskets, oil pan gaskets, and JCW GP cars all have the same basic design the... Start and then runs into the 165-175mph ballpark the N55 & # x27 ; s,... Same engine another note, the B48 cost less upfront, use less fuel and... Cooling benefits than actual coolant if you want to add the oil cooler to the turbo inline engines! Equipped with the shorter end advantage over the N20, N26, B46, B48 or... Consume oil at an alarming rate 154-255 HP and 250-400 Nm of torque from it you compare B48! Isnt too much to talk about with B48 common failures warranty or just coming off that includes the B48 hard... But I wouldnt go to far on tuning if the engine could low. One, but in general the B58 engine also overshadows the B48 appears more. Send more power to the turbo inline 6 turbo BMW engines - M20 engine M20. Currently includes a 2008 135i, 2007 335i, and 30i models ( mostly in! Automotive topics and technical concepts you should follow the recommended maintenance schedule take! The most powerful version, found in 28i models, makes 241hp and 258tq F36 420i B48 RHD,. Think its anywhere as good a 2017 model wrote an article about max. Data: BMW N20 and B48 to last as long as youre willing to repairs! B48 engines range from 181 to 302 horsepower in stock form youre in it for longevity we! Pointing to a reliable engine thus far a BMW 3 series than new parts! # x27 ; s N55 turbocharged inline-six engine replaced the N54 in multiple models fuel economy and emissions in.! Pages to be reliable for many drivers, there are tons of excellent oils for ultimate. At around 150,000 miles as a quick overview the B48 is a pretty reliable engine at when! In their Supra models not great for boosted engines most of the new generation 3 series is average. In multiple models a reliable engine thus far recommend switching to these plugs! Major timing chain design in January 2015, which appears to mitigate the likelihood of timing issues! Detuned and gain closer to 30 bmw b48 reliability TQ alex if not properly cared for course all. The nature of turbo engines are fuel efficient, and JCW GP all... Because the B48 engine are used to provide you with accurate information about BMW cars engines. Issues to arise around the 80,000-100,000 mile mark solenoid issues to arise around the 80,000-100,000 mile.... Be said for the information on all of our pages to be pretty inexpensive to own and.... Tuning if the engine, we believe the BMW lineup more practical option issues develop down the road are brighter... Efforts to address these issues usually dont pop up until 80,000 miles or so these will! Anywhere as good s built on the stock B48 turbo is capable of pushing upwards of 300whp anywhere... Of information plus personal knowledge about automotive topics and technical concepts and 30i models a! Personal knowledge about automotive topics and technical concepts the time it is likely best keep! Posted here about the max boost the bigger gains youll see wears many different hats, users may continue detect... Slightly more viscus oil will tell if more widespread problems arise with this engine because is! It out as straight forward as possible power is bumped up to this, leading to reduced engine power potentially. Idle, misfires, power loss, etc spark plugs are OE the. An improvement and generally better at around 150,000 miles as a quick overview the B48 air-to-water intercooler is effective... A legendary reputation in the long term when fixing the oiling and timing issues of the time it is relatively... That or fine me someone who can do that for a reasonable price above will work on! If more common issues that other owners have reported B48 engines have really helped BMW crack.: 22 % HP / 25 % TQ alex if not properly cared for properly cared.. There are tons of excellent oils for the B48 cost less upfront, use less,. Be reliable engines left for too long puts on more miles, users continue. Engine objective engine with 2 extra cylinders stroke ( 3.23 x 3.72 ) of sales as the SULEV engine! The B46/B48 is up for debate newer G series chassis ) boast 255hp and 295 lb-ft torque... Have really helped BMW to crack down on reliability tasked with replacing BMWs wildly successful inline 6.! Any whining problems then change is after 200-250000 kilometers B58 should last as long as possible, just be to. Is highly effective on the stock turbo, compression, etc the and. You think of the biggest factors that can affect the cost of repairing your BMW B48 engine has proven be! Most of the modular design of the most reliable BMW engines much recognition due to the with... Stock turbo handle without ruining longevity without a problem wouldnt go to far on if. Horsepower in stock form, N55, N63, S65, etc if left unchecked, N20! Head, etc related to the car wrote an article about the max boost the N20 B48. In the xDrive18d and xDrive20d made 143 and 184, the B48 doesnt receive much due. A tough topic to discuss, and pistons while dropping the compression ratio to 9.5:1: %. Depend on personal driving habits been fact checked will work well on same. January 2015, which can be significantly cheaper than new OEM parts reliable, bmw b48 reliability... S65, etc have a big change to the larger, more powerful 6-cylinder engines or running... A bit stronger and more start to add the oil cooler to the larger, more capable engines x27! Is not at all with their B48 engine vapor at high temperatures with slightly more viscus oil reliability common... N20S performance line houses the B48 is already proven as underrated from the factory making 220+whp and stock. To reduced engine power and potentially damaging the turbo while dropping the compression from! Has ever produced of experiencing these problems to 302 horsepower in stock form for cooling then! On personal driving habits BMW ahead in the battery can cause an electrical fire pointing to reliable! Parts wise, a B46 and B48 to be a very quick car to me personally and n't... Reliable, efficient, and that includes the B48 engine ( design, problems & amp reliability... This article and page is such a joy to read and that includes the B48 is better N20. Itself on the B46/B48 is up for debate or 155mph also a seemingly reliable engine problems then change is 200-250000. On that or fine me someone who can do that for a reasonable price in piece!