And I do own a 1990 bmw E34 520i with the M20B20 engine ,wich is very close to 300000 kms with no problems. The B58 is not only reliable judging by BMW standards but by international standards. There are more tuning options available, however, the N55 single turbo design limits it tuneability as compared to the twin turbo S55. As such, the engine was updated and is quite different from the previous 3 engines discussed. All BMW petrol engines past n54 run above 100C in normal operation when you press the fun pedal, the coolant temp will rise a bit but locally on cylinder slews it can reach 160 C easily. And if they are, can the transmission ratio be changed? My 2019 m140 with 9800 miles has just started doing the same thing,most noticeable in eco pro mode or comfort.As soon as i maintain a consistent low speed of 30mph at 1000rpm the car starts surging,the revs dont increase but i can hear the surging through my remus exhaust which is annoying. The BMW b57 and b58 seem to be solid engines with no glaring design flaws, and a solid reliability record when looked after. Lets look at both engines in detail to find out why the N55 is not as reliable as the new B58. The N54 might not be extremely reliable when it comes to things external to the engine. Though some will shame the cost cutting by developing engines with the same specs I think it is a wonderful idea. The BMW S55 is an impressive engine from top to bottom and will continue to shine in the tuning world. However, it wasnt as drastic of an improvement as some say. ps. B58 to N55 Comparison. It manages a respectable 322-382hp and 332-369 lb-ft from the factory. So, we've got a bit of a headache here. We may receive a commission for purchases made through these links. Not as much as upgrading coolant pumping ability via a different pulley which is maybe a 10$ mod. B58 reliability concerns No engine is perfect, and some samples of the B58 suffer from minor issues. Bimmerly is a hub for BMW enthusiasts. The B58 is definitely an awesome engine and were impressed with how quickly things are moving forward with the platform. 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). No leaks found when parked, no low coolant warning either, so the low coolant thing was puzzling. 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. As with most larger SUVs and 4x4s , especially if your roads are hilly or twisty or you carry loads. Two of our N54's are nearing 120,000 miles on original VANOS components. 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. 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. Independent repair shops often have much better pricing, but repairs will still be expensive if and when theyre needed. It says a lot that Toyota opted to use the B58 in a model that made them known for building a beautiful engine in the 2jz. The most common problems are water pump failure, cracked charge pipe, valve cover gasket leak, and oil filter gasket leak. I have 7 series with N55, I did remap (stage 1) and able to gain 400hp and 560NM torque. Deposits can cause misfires and power loss. The new injectors found on the N55 are not nearly as problematic as the piezo injectors. Once youve done it a few times it becomes very quick and easy. 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. I'm a fan of servicing my vehicles probably more than they need it, but then you've always got piece of mind. Any of the engines mentioned in this article will experience carbon build-up. Thanks! Jake and I have both had excellent experiences with reliability on our N54 powered 135i and 335i, respectively. A 2017 340i M Sport uses the B58 engine, which is a single turbo. Thank you, Zach! You can get old one with slowmo (really helps) for about 100 quid. Ive followed the bro science in the Fxx community and couldnt help but wonder, if the timing gets thrown due to a spun crank hub, why not make a fix then? Even more so after reading so many comments here where almost new cars had to change engines, Seriously dude, I think you might be overreacting 300k is nothing. BMW UKS reply was change valvetronics and re-programme. All of the power also comes coupled with reliability, which only ranks below the B58 due to the nature of the S55 being a higher performance engine that will generally cost more to maintain. Im looking to buy a used 2019-2020 BMW xdrive convertible with less than 10 k miles. The upgrades to the B58 include a closed deck block, forged steel crankshaft, air-to-water-intercooler, and an upgraded fuel pump. Replace the accessory belt every 80,000 miles. However, as the engine ages, we recommend replacing the valve cover along with the gasket. In this guide, we'll be covering the following B58 engine problems: We'll break down these B58 engine problems in-depth and discuss why they made the list. A failing injector may trigger a check engine light and depending on the severity the car might not be drivable. That got lemoned (hpfp issues). Notably, the engine stepped down from the true twin turbo design, found in the N54, to a twin power single turbo. The latest iteration of BMW's iconic six-cylinder inline engine . The main tank is essentially what would be standard on all cars, while the secondary tank is for the B58 air-to-water intercooler. Change places of where your camera is so you can better locate it etc. Check your turbo coolant level (smaller of the two reservoir caps). JavaScript is disabled. Ive had issues with my 2018 440i not idling correctly. That can be an extremely pricey job, ranging between $500-$1,000 at most dealerships. Compared to the competition, we believe BMW is building the best mass production turbo inline-6 engines in the world right now. Ever since the twin turbo N54 hit the markets in the 2007 BMW 335i, BMW has been building on the design of the turbocharged, direct injected inline 6 engine. Coolant loss The B58 uses two coolant tanks in its system. . 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. In reality these are a tiny % of the number of engines out there.And usually someone has abused it or skipped a service.I expect the engine to be very reliable and well suited to the vehicle.At least as good as any Defender engine! Of course, this may vary a lot from shop to shop. This is where the B58's heat encapsulation system may come into play. If youre going to the dealer for everything then both the N55 or B58 could get expensive. 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. If possible, How much would it cost? You did bring up an excellent point with localized areas where coolant temp may be hotter leading to evap. This engine was manufactured by BMW in 2015 and was still in use. The ML variant makes 335hp while the OL features a staggering 382hp. 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. The B58 is not only powerful, fantastic to use, affordable, and reliable (from what we can tell, it's still a relatively new engine), it also has innovative tech, such as mild-hybrid systems in. 423whp/457wtq in SAE correction (439whp STD) for this B58 2018 340i Customer shared this dyno earlier today running the latest v1.6 Stage 2 93 octane (98RON for those in Europe) OTS map. I sent the original map to the tuner and they modified it then I reinject the modified map by myself. In our opinion, BMW nailed the design and specs on the S55 and is truly the most capable engine in this comparison, by a long shot. Your email address will not be published. hopefully BMW will sort this out. The N55 is reliable enough, and a significant improvement over its predecessor, but the B58 is stronger and more reliable than its older brother. My history with bmw is: Any bmws with the 40 engine will have the b58 including the Z4 and mk5 supra, Did the crank hub in the S55 get revamped for Toyota? e90 200k miles. Early models feature the 322hp or 335hp B58, while MPPK (M Performance Power Pack) models get the 355hp version. Ive replaced the worst offender pipes, and used pure bmw coolant ever since in it. Sometimes, B58 coolant loss can be dependent on other things as well. More important than the upper-limits, the N54 was most impressive due to its ability to produce big power without requiring significant supporting mods, such as upgraded fueling. 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. 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. There do not seem to be any common issues yet, however, that may be subject to change as the engine ages and more come off their factory warranty. The B58 oil filter is prone to shearing at the bottom. Although, let's put a rumor to death quickly. Enjoy your new B58! Obviously, with so many potential causes for a low coolant warning, the fix depends entirely on what caused the leak in the first place. You can use the opportunity to negotiate the price down, and use the cash to replace the most common issues that actually do happen on bmw engines (rocker cover gaskets etc there are few useful write-ups on what you can actually find on each model so do some reading before you look at listings again). Regardless, the B58 is working up to be a reliable engine in its young career. It provides an opportunity to improve one single design, as opposed to totally re-designing engines. However, it also carries some notable changes that may affect performance and reliability. The B58 engine produces 320 horsepower and 332 lb-ft of torque in the F30 340i. Despite it being a relatively young design, the B58 seems to be a very reliable engine. In the years to come, the B58 will be an excellent performance value, but it is too far from it right now. 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. I had the 4.2 I6 in both my 1975 Landcruiser (FJ40) and my 1978 Jeep CJ-7. Merry Xmas all from Chris in Canberra, Australia! 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