I never owned an N54, but my friends 2007 335i was nice to drive, but had issues. Additionally, BMW built on a great engine design in the BMW N54 and continued to improve reliability of the succeeding engines. My history with bmw is: So much so that I'd prefer it over the N55. Disclaimer: This site contains affiliate links. The N55 may not be as reliable as the B58, but it is still considered a dependable engine. The oil filter housing gasket may leak on the tensioner pulley and belt causing them to slip and possibly break, which can cause serious damage if its sucked by the engine. My m140i has now been back to the dealers 3 times in the last 9 days.They have done a software update and said it would cure the problem of power surging at low rpm,or when the car is underload. As mentioned, this shouldn't be a huge deal in most cases. **Ranks are as compared between the four turbo, inline 6 engines**. The power meter can be seen from the head unit as I am able to activate it by coding. A tune and bolt-ons will take the B58 into the 400whp+ range; outstanding for a 3.0 L engine, but nothing insane compared to BMW's other inline-6 turbo engines. The BMW B58 engine can handle around 600-650whp and 550-600wtq on the stock block and internals. Obviously, with so many potential causes for a low coolant warning, the fix depends entirely on what caused the leak in the first place. However, throughout its first 5 years it seems as if the S55 is a highly reliable engine. Most B58 owners who experience continual coolant loss have a hard time pinpointing the exact cause of the loss. Sometimes, B58 coolant loss can be dependent on other things as well. I too have had the coolant loss issue. [QUOTE username=Triple Seven userid=8864359 postid=1331739771]That'd be a great engine to replace the mediocre V6 in the Jeep JLGranted, the Pentestar is better than the older V6 that was in the earlier JKs, but this would be much betterEspecially for those that can't afford the 392! VANOS solenoids may be considered a normal wear and tear item. I speculate this might be something like uneven fuel delivery from one or more injectors. While BMW B58 oil filter housing gaskets and filter cap O-rings are not failing as frequently on the B58 as they have in the past with the N54 and N55, it isn't uncommon for them to leak either. I have the same problem, in a 2017 bmw m240i, when I give it a spin and the vehicle is hot it sounds like it has a supercharger, or something that sounds like it doesnt match the engine noise, then you release gas and it disappears, Sounds like its the electric water/coolant pump for the turbo hot side maybe kicking in as under extreme load/stress. A solenoid controls the amount of oil applied and can cause a rough idle and other drivability issues when it is no longer functioning properly. Excessive oil consumption is another big one that can alert you to this issue. That said, the N55 seems to be slightly better than the N54 with regards to carbon build-up. Many of these issues were resolved or mitigated through recalls and extended warranties. Really appreciate the info. Now, we left out some potentially promising information. It makes hellcat owners cry all day, every day. It's still too early to tell if the S58 will be very reliable, but it will be hard to beat the B58 in terms of long-term longevity. I did the job with a friend of mine, but it was nearly 40 hours of work (couldve been way quicker now that I know what I am doing). Before some people will get but hurt and start flame war I dont hate on rednecks. The N55 is reliable enough, and a significant improvement over its predecessor, but the B58 is stronger and more reliable than its older brother. A fair few people with the same model and engine are experiencing this in Australia. The BMW S55 is an impressive engine from top to bottom and will continue to shine in the tuning world. AND BTW, I dont know whenever new caps will fix anything. Since the initial release of the BMW N54, the engine has gained quite a positive reputation in the tuning community. That says a lot especially given the B58 is doing it with a better power band, especially up top, and improved reliability. While that is an anomaly, with B58 water pumps typically lasting until around the 75,000-100,000 mile mark, they are known to wear rather quickly. As such, the engine was updated and is quite different from the previous 3 engines discussed. BMW's B58 and S55 engines are newer, so more issues may pop up down the road. Thanks Zach! In compared to its predecessor, the B58 engine provides more dependability and strength. Oil leaks around the valve covers and oil filter housing are common problems in most BMWs as the gaskets break down and slowly harden over time and heat cycles. Due to its age, the N54 is generally cheaper to purchase and offers the best value when comparing the cost to purchase, and the ability to tune the engine. Currently stock on stage 1. This helps with the length of the connector cable. other than that it runs good and I still like it. 49 32 comments Best Add a Comment ijustbrushalot 8 mo. The M340i is a beautiful car and the B58TU is a great engine. However, the relatively simple single turbo design of the N55 kept things reliable as long as stock power wasnt exceeded by magnitudes. Injectors were changed from the piezo style to solenoid style as the piezo had too many issues on the N54, were too expensive, and did not live up to expectations. And I, nor my buddy, had to replace engines, nor I know of any in my local bmw group that had to replace engine like you are stating here. Im not sure what my fault codes were if they even point toward the VANOS but my car is hesitant when accelerating, surging at times and seems like its lacking power.. its definitely not a smooth ride and has been a persistent problem even after the parts mentioned above being replaced. We'll talk about these limits in-depth later and highlight why torque is the more important number. When your BMW B58's PCV valve fails, or is nearing failure, one of the most common symptoms is smoke coming from your exhaust. Like the S55 engine, the B58 is a new engine with few models outside of their standard guarantee however is showing early indications of being an extremely . Why? Our site is dedicated to all things BMW Tuning related. Car done 150k now, and pipes that I replaced are still right colour, original coolant pump still works OK and I have zero issues with overheating and coolant temp when idle fluctuates at 110 117 C. From what Ive seen at the dyno where some inexperienced or know better then the test schedule requirements technician used pure water for cooling on endurance or long term emission tests, cooling pump seals and joint between shaft and plastic prop would fail first but on my car it was not the case so far, so as usual T&C applies, your milage may vary. And for those with lots of money to spend theres the Ford BARRA 4.0 straight six engine! Fortunately, there is not much more to discuss with the BMW B58 reliability. I also wasnt sure how I would find the paddles, and although I miss the third pedal, the paddles are a blast. Certain G series models began receiving the updated B58TU1 in 2019. Many issues with their turbo engines. Although, let's put a rumor to death quickly. We've seen some VANOS problems with the B58 engine. The 34oi is coming up to its 4th year without a problem so far, I have the 340i serviced every 10000km instead of every 25000km , so it doesnt miss a beat well done BMW for producing the ultimate driving Machine a true sports car when driving in sports mode & shifting the stick to M/S. Once youve done it a few times it becomes very quick and easy. Developed & Maintained by So far the valves have been cleaned, DME & transmission software has been updated and most recently the 8 speed auto transmission was completely replaced by BMW Sydney but the problem persists. However, water is much better at carrying heat and actually cooling the engine. Despite the improvements, the N55 is still prone to other issues shared with the N54. We may receive a commission for purchases made through these links. The best one worth having and mentioned is S38B38 from the E34 M5 car. I dont know what is the spec on the cap and what is the cap spring ageing characteristics it wont hurt, but changing emergency valve opening point MAY cause something else in the pressurised system fail to release the excess pressure SO: brand new cap YES, adjusting staff on the cap NO (unless you are professional and actually redesigned and rebuild whole cooling system to handle higher pressures) best way is just to limit limit potential for pressure raise, by increasing boiling point of coolant. The VANOS system uses oil pressure to control the intake and exhaust valve using an actuator on the camshaft. Do you want to get more excitement out of your B58-powered BMW? There are countless videos of B58 BMW owners with this exact symptom resulting from a damaged PCV. It may not display this or other websites correctly. It manages a respectable 322-382hp and 332-369 lb-ft from the factory. Once the pass side is in and connected, install driver side and connect. Steph Papadakis and his boys are making 1000HP @ ~42psi on a 2020 Supra B58. Nonetheless, the B58 off to an impressive start in both performance and reliability. Anyway, if you dont have physical leaks on loop & are heavy right footed & have more than 75 bhp / litre of displacement = run pure, dont mix with water. I do love a straight 6. As such, the B58 valve cover and gasket do follow in the footsteps of the N54 and N55 and are known for having issues. Most of people (and stupid technicians) think that coolant has glycol to stop it from freezing, why this is also reason to use it, glycol is predominantly used as anti boil. Im not convinced there isnt a secondary issue. Thank you, Zach! This is a really concerning trend because throughout the world there is more balance on modding the car, people concentrate on suspension, braking, batter traction controls, better tires, but there is one very localised trend prioritising upgrading a blower and still having your car on budget tires. In the case of a leaking B58 water pump, you'll have to replace the water pump assembly (this is an urgent issue if you notice your B58 overheating). Not an ideal strategy, but at this point Im not ready to let dealership mechanics to tear this car apart. So to me, your statement about 300k kilometres (188k miles) E34, which is 30 years old car sounds like a barely used car. when removing the reservoir cap, I noticed a bunch of crustiness. Ram/Jeep had plans to come out with a turbo powered I6 to replace the 5.7 Hemi, but nothing seems to have come from that. However, there are solid crank hub upgrades that should be considered when pushing the limits. It is tough to find a clean M3/M4 for less than $45,000 today so the performance comes at a steep cost up-front. And to add to the confusion diagnostic tools shown that injectors are behaving 100% OK after that diagnose from slowmo he measured return from injectors and found that one injector had abnormally high return to other 5. "Natural" is in quotations for a reason. This increases performance by. Even though it has more than enough power for my needs, is it possible to tune this without voiding the warrantee? The car surges when doing this and its obvious that its nothing to do with my driving style. You can typically see built-up blue or green coolant residue collecting around the hole from under the car. Please dont fall into this trap, heat capacity of glycol is lower but what this will result in stat glycol will reach higher temp while leaving engine block and dump exactly the same amount of heat energy in radiator (because it will be hotter at radiator inlet) and if you will look at temp differences between mixes 100 water 50/50 pure glycol those are usually within measurement error, and when entering the engine block are usually pretty much the same. In 2010, the 335i received the updated N55 engine followed by the B58 in 2016, however, the model was rebranded to the 340i. How do the BMW N54, N55, B58, and S55 stack up against each other? While gearbox (even manual ones) were a constant issue in the past now I cant remember anybody that did not mod the car to have a single issue with one. Of course, we are biased towards BMWs here at BMWtuning.co, but we fell in love with these modern turbo BMW engines for a reason. Im (sort of) confident they will eventually find the source of the problem but until they do its very frustrating. Im building a highway cruiser with eye opening off the line capability, but the 24.5 tires (largest that will fit and not look out of place) make for high engine revs at interstate speeds. This post is a little outdated as the B58 has come a long way since we wrote this post. The ML variant makes 335hp while the OL features a staggering 382hp. Just remove all the plastic covers and you can get your hand back there. The BMW B58 engine is a turbo 3.0L inline-6 that was first introduced to BMW models in 2016. . Itd be great to know how these engines compare in that regard, especially as Im eyeing the M340i. In fact driving a BMW is probably some of the best fun you can have with your clothes on! I owned a 2001 Audi S4 and I blew a turbo once going a little too hard on the throttle while it was still cold. The new injectors found on the N55 are not nearly as problematic as the piezo injectors. 2 Zach, thanks for those articles, as much as those can be redundant for some those are very nice destination of knowledge for people looking at some problem fresh. One of the most common leak locations is the water pump. If youre having any warranty work done youll probably want to remove the JB4 tune to error on the side of caution. I add small amount of coolant from time to time, but nothing crazy. Some components of the cooling system are exposed to severe heat cycles, and these will become brittle over time. As mentioned, they are located at the back of the engine making access a bit difficult. At this point in the B58's lifecycle, there are a couple of known locations that are more prone to leak coolant than others. The N55 and B58 are similarly designed 3.0 inline-6 single turbo engines. Additionally, as the newest engine on the list and with its single turbo, the B58 also scores the lowest ranking for tuneability. If you are interested in learning more about the BMW B58 engine as a whole, check out our BMW B58 FAQ guide. Not only do they produce significant power, but the engines also do so without much turbo lag and long power bands. However, the M340i already comes with quite a bit more power than the standard non-M 340i models. Yes Im in the UK John. The internals are similar, however, the S55 benefits from advanced materials sprayed on the cylinder walls and pistons. BMWs B58 and S55 engines are newer, so more issues may pop up down the road. This can result in oil-rich gasses being pumped into the intake manifold. The B58 has more horsepower and torque then the N55. Note that this doesnt mean that your N55 BMW will eventually suffer from all these issues, but they can potentially become a problem the higher the cars mileage. VANOS is BMW's terminology for VVT, or variable valve timing. Thanks. Lastly, issues with waste-gate rattle were mostly resolved on the N55. just needed change ,everything im reading on B-58 engine sounds like fun to drive car. It's worth a shot. Bit of methanol injection will help keep your intake valves cleaner. Totally agree. Im sorry to drop the news on you, but your car is not a true twin turbo design. From my understanding it is a fine engine.Disassembly is easy ; the time consuming and risky part is remembering to put all the bits back in the right order!Main costs of maintenance will be consumables such as tyres and brakes. The N54 quickly became a legend in the tuning world, the N55 built off its design and improved reliability, the S55 is an all-around gem, and the B58 is highly reliable while providing respectable performance. We also think the B58 should hold up a bit better as it ages. Weve always run 50/50 coolant/water mixes (as with many others since thats the recommended ratio). And thats the N54 which is regarded as one of the less reliable BMW engines. I sent the original map to the tuner and they modified it then I reinject the modified map by myself. B58 to N55 Comparison. It cost about 180 Euro. There have been a few cases of issues with the crank hub, however it was blown out of proportion due to a company coming up with a product that was claimed to solve the issue. Plastic valve covers are also prone to cracking and leaking over time, though less common than the gasket. Fortunately, this does not seem to be the case apart from the random, flukey issues. BMW Reliability Most Reliable BMW Engines. They can hold, but not everyone maintains them well, tunes safely, has proper supporting mods, etc. Hi the B58 is not the same engine as M4 M4 is S55. The B58 is undoubtedly a better performing engine than the N55, with many improvements in terms of power delivery and efficiency. Your email address will not be published. The B58 engine is the successor to the N55 engine. After numerous visits to my local bmw dealer, it got a new engine. Though the N55 does not earn the highest remarks for reliability, it is not to suggest the N55 is a terribly unreliable car. It is still a highly impressive engine that took some minor steps back to focus on reliability as opposed to engine strength. I have had all 3, I had a 535i e60, with the n54. Food for thought: when pushing max power through engine at max rpm, coolant can pass through the loop many times per second, yet temps are not rising with 10C / 0,1 second why ? Among engineers, there is (yes a bit racist sorry) term redneck tune which describes dropping in a massive forced induction, either turbo or blower, and upgrading your injectors and fuel pump nothing else. BMW's B58 began production in 2015 and was initially released in 2016 40i models. the vanos solenoids were a 20min job with a cold engine. Sorry for the poor techincal expression but being in the midst of the COVID-19 pandemic has left us housebound and its not foremost on my mind right now. Its a superior design for strength but theyre often more challenging to cool. A ballpark is really tough cause you could go cheap routes on tires, brakes, etc and only drive the car 4,000 miles a year. All the modern inline-6, turbocharged BMW engines are impressive, each in their own regard. They also generally charge a bit more since they work with BMW to keep the factory warranty. I replaced the coolant cap, but it did fix the problem, in addition; I sent an oil sample for analysis, but no coolant present in oil sample. According to my best measure it is about 250ml/1000 Km. Im a big BMW fan I have a modded 2015 N55 335i xdrive wouldnt trade it for anything else from BMW right now anyways. Check your turbo coolant level (smaller of the two reservoir caps). On the forums you can see logs people recorded showing DME demand and the position feedback chasing it. BMW tech found low coolant on the low pressure side. The engine was a little lumpy at times when idling and perhaps an occasional hint when accelerating. It has honestly amazingly smooth power delivery and sounds better. You must log in or register to reply here. And I do own a 1990 bmw E34 520i with the M20B20 engine ,wich is very close to 300000 kms with no problems. Dont hesitate to pack those with even more detail ! Perform oil changes every 5,000 to 8,000 miles. Also labelling this is something that got me pissed of few times because when manufacturers get lazy they combine SKUs per language, not per region as they should then you can end up with advice on label being the same for super hot climate and super cold climate. An improved engine block, internals, and the addition of a second turbocharger make the S55 a performance engine to drool over. Smoke from the valve cover area is common if the leak is bad enough. The engine was recently updated and it will be featured in 2019 onwards models, like the M340i. Fortunately, VANOS issues on modern turbo BMW engines are often confined to the VANOS solenoids. Glad I wasnt imagining this weird phenomenon . Should I continue looking for a used BMW or After replacing it he enjoys the car again and issue is rectified. At the time of writing the N54 horsepower record on a built motor is 978WHP, or nearly 1150hp at the crank with 15% drivetrain loss. Appreciate any thoughts! Merry Xmas all from Chris in Canberra, Australia! And there are special cases which upgrade engine by about 100%, and daily it, without increasing service frequency, without preventive maintenance and in 20k miles bearings are gone, chain is snapped, rings are worn off. Usually, owners dont report major issue. Crank and block should be plenty strong to handle 800+whp. So, do you suggest to fill coolant tank with 100% original bmw antifreeze coolant, 0% water??? The B58 is a great engine, but the S55 is better. Which of these BMW turbo inline-6 engines is your favorite? If you can pull out the broken filter, inspect and clean any debris. . Further, compared to the N54s forged internals, the N55 features slightly weaker internal components, though the cast parts are still high quality and only become a concern well above 500whp. You can say we are somewhat N54 fanatics. But sometimes, my engine just doesnt want to start. We appreciate the positive feedback. Once removed there is no way for BMW to tell the car was ever tuned. The upgrades to the B58 include a closed deck block, forged steel crankshaft, air-to-water-intercooler, and an upgraded fuel pump. Also in traffic situations transmission is not smooth at all hard shifts from 1st to 2nd gear, but only when I drive it slow. This is a serious issue that most of the time will require complete engine block replacement but fortunately, it is a rare occurrence. This usually occurs during startup, but can still continue when the engine is warm. With that being said, I would not buy a BMW B58 at this moment. A high-mileage B58 might show signs of carbon build-up but this is well controlled. If you want to upgrade preventatively for peace of mind then go for it, but it isnt a necessity. Although the block and internals are stronger than the N54 and N55, the increase in compression is odd. Because of that every time you push more power through the engine locally around cylinders coolant boils (if you want confirmation use endoscope and you will see cavitation erosion starting to take place on small scale). I hope to get a 2015 M3 in a few years time as i would love to drive the S55! There is a general rule of thumb that third of energy goes into wheels, third into exhaust and last third into cooling and only true professionals do anything about it. Soooo if you have some noise under load best record it from engine bay. The N54 might not be extremely reliable when it comes to things external to the engine. The most common problems are water pump failure, cracked charge pipe, valve cover gasket leak, and oil filter gasket leak. Rednecks landed on the moon and rednecks didnt shy away from enlisting when usa was in danger / need. It . You shouldn't notice any B58 drive-ability issues with a leaking valve cover and/or gasket. Compared to the two former engines the N55 has been on the road longer, allowing for additional time for tuning developments. Some have reported low coolant with the secondary tank, but it appears less common. Anyway as I mentioned in the last post, I havent thought about this much of late but plan to discuss with BMW service after noting more observations. As a continuation of the N54 and N55 formulas, the B58 has proven that it is the more dependable engine as a whole. B58 Reliability: I hear it will be good long term. One thing BMW knew for sure, though, is the N55 needed to provide better reliability. From day one of delivery, I have often smelled coolant. Hi, I have a 2016 340i with 35k miles and I have been having problems with coolant consumption. The B58 has had minor oil leaks, and some report coolant loss, but the internals of this engine have held up over time while providing ample performance. Hi All Although the B58 uses similar rubber VCG's, the engine has one advantage. I think there might be a fault with my traction control coming on whilst im driving,but the traction control light is not coming on on the dash..Ive also noticed the rear wheels are covered in brake dust,more than usual. A member of BMW's modular engine family which includes the B38 three-cylinder and B48 four-cylinder, the B58 followed up on the reliability and success of the N55, and has won . The position feedback chasing it BMW engines are newer, so more issues pop! More to discuss with the BMW N54, but nothing crazy purchases made through links! Feedback chasing it to tear this car apart as well M3 in a few times it becomes very and... Pressure to control the intake and exhaust valve using an actuator on the camshaft tuning.! Tank with 100 % original BMW antifreeze coolant, 0 % water????. Forums you can have with your clothes on N55 kept things reliable as long as stock power exceeded. Hard time pinpointing the exact cause of the BMW N54 and N55, B58, and S55 engines often... 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