b58 engine reliability
B58 to N55 Comparison. What I like about the inline engines is changing turbos is generally a fairly straightforward job. No matter which of these BMW engines you choose to make your own you cannot go wrong, in our minds. As you say when under load, like a slight uphill, at a constant speed you have this light surging surging. Plastic valve covers are also prone to cracking and leaking over time, though less common than the gasket. Stupid technicians, or cheap skates that mix coolant with distilled water cause cooling system boiling point to fall. Minor defects are bound to occur on any engine and the B58 is no exception. BMW UKS reply was change valvetronics and re-programme. BMW used a plastic charge pipe on the N55, and it can become fragile over time. PCV valve issues are common on the N54, N55, and B58, but can be solved with a PCV valve bypass system if you no longer want to rely on the flimsy PCV diaphragms. 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. Stock Power: 424 HPWorld Record HP: 1150WHP (~1350 crank horsepower!! However, it can be hard to catch with this symptom alone, as the B58 also has other oil consumption issues. 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. A few recalls and service bulletins do exist for the B58. Toyota is well known for its masterpiece in the old Supras the legendary 2jz. One problem that may be found are issues with the stock crank hub. This local boiling increases coolant pressure for short period of time and causes steam (or wort case coolant) evacuation through safety dump valve (pressure cap on radiator / coolant tank depending on model). Thank you, Zach! The B58 uses two solenoids. Why? Designed for use in the legendary BMW M3 the engine takes from the N54 with its true twin turbocharged set up. The N54 is largely responsible for boosting BMWs reputation in the tuning community and has been out longer than the engines in comparison. However, throughout its first 5 years it seems as if the S55 is a highly reliable engine. Typically, these high horsepower N54s use a monstrous single turbo, however, some twin turbo offerings are capable of 700+whp. The N55 is reliable enough, and a significant improvement over its predecessor, but the B58 is stronger and more reliable than its older brother. 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. Developed & Maintained by One of the most common leak locations is the water pump. Although, let's put a rumor to death quickly. Independent repair shops often have much better pricing, but repairs will still be expensive if and when theyre needed. B58 is reliable, bulletproof and can handle hella boost on stock block. The B58 is a marginally larger engine displacing 2,998cc compared to the N55's 2,979cc and weighs 18 lbs more, but while making notably more power. It has honestly amazingly smooth power delivery and sounds better. My regret (not even a problem) was that when moving from E to F, BMW matched gearboxes and diffs more closely to stock engine torques, which in my mind was a bit of step back, because you could always count on 3 things with BMW gearboxes in the past 1. they did not provided greatest feedback 2. they always had decent of headroom potential tune 3. every-time you changed gear you felt like you reloaded WW1 full caliber rifle. About other part of your comment. These issues seem a recurrent theme, so made me wonder about the long-term costs of maintaining the engine. Save my name, email, and website in this browser for the next time I comment. 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. To find out more, read our Privacy Policy. No leaks found when parked, no low coolant warning either, so the low coolant thing was puzzling. First, the B58TU1 is available in "ML" (middle output) or "OL" (high output). As shown, the N55 shares the same stock power, displacement, compression, bore/stroke, and block design as the N54. perhaps look for a used Audi 4 wheel drive convertible. Too much trouble. Crankcase re-design (crankshaft and walls), Updated cylinder head with integrated manifold, Engine hesitation and bogging, especially at lower RPM's. Three times this has happened and Ive only just reached 14500 miles. Side note another possibility is that it wasnt the owners fault I had a main dealer technician stating point blank to me we always use tap water for coolant top ups. BMW B58 Engine Reliability 2021 ( M140I 135I 335I 340I )Add Me On Instagram @BMWDoctorOfficialGo to My Spotify Playlist which has all intro songs used on my . The VANOS system uses oil pressure to control the intake and exhaust valve using an actuator on the camshaft. Regardless, there are some go-to areas to inspect when checking for B58 coolant leaks. What are your thoughts and experience with the B58? And if they are, can the transmission ratio be changed? On the forums you can see logs people recorded showing DME demand and the position feedback chasing it. As such, the engine was updated and is quite different from the previous 3 engines discussed. Lastly, issues with waste-gate rattle were mostly resolved on the N55. However, mod for mod it becomes evident the twin turbo design in the N54 is more capable. The BMW B58 engine is a remarkable one. 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. If you get a downpipe and aftermarket tune youll definitely want to remove the cold start function. All rights reserved. Ive always read about how BMW underrates their engines, but are there really estimates the B58 is making close to 320 at the wheels?! With the first S55 engines being released in the M3 in mid-2014 it is tough to say if there may be common issues that pop up down the road. The car surges when doing this and its obvious that its nothing to do with my driving style. Thanks for the clarification and reply. When your BMW B58's PCV valve fails, or is nearing failure, one of the most common symptoms is smoke coming from your exhaust. According to my best measure it is about 250ml/1000 Km. Im guessing something might be coming up in future Im not sure if any other b58 owners have this or if its common The best one worth having and mentioned is S38B38 from the E34 M5 car. Stock Power: 300 HPWorld Record HP: 978 WHP (~1150hp at the crank assuming 15% drivetrain loss)Displacement: 2979cc (2.979L)Turbocharger: Twin turboCompression: 10.2 to 1Bore x Stroke: 84.0mm (3.31) x 89.6mm (3.53)Internals: Forged crank and rods. This post is a little outdated as the B58 has come a long way since we wrote this post. I have had all 3, I had a 535i e60, with the n54. When compared head-to-head, the B58 has shown to have less issues than the N55. Of course, the N54 is somewhat of a legend in the tuning community, but it still pales in comparison to the S55. Fortunately, BMW learned its lesson on the N54 and focused on improving the reliability of its future turbo engines. Some owners are reporting coolant losses in the main tank and possibly in the second tank. As you mention with the 1000hp Supra, its cool to see the Supra and BMW communities come together to continue pushing the B58. BMW used an electric water pump on the N55. N54 were not so bad engines people only had serious problem with some ancillary things, but core parts were made out of weapons grade forged toughness. Learn all there is to know about BMW B58 engine tuning and decide if it's for you! Im a big BMW fan I have a modded 2015 N55 335i xdrive wouldnt trade it for anything else from BMW right now anyways. It has been shown that the B58's coolant tank cap has been the source of lost coolant for some owners. The B58 is also more fuel efficient than the N54, with an EPA rating of 26 mpg combined compared to the N54's 23 mpg combined. This isn't absolutely necessary but will help get any possible filter debris out of the oil. Thanks! Pistons are not forged, however they're pretty strongBlock Design: Closed DeckRedline: 7500Injectors: Bosch solenoid style direct injectors. You can diagnose plenty of odd things and remember that engineers spent years making sure that engine bay vents under the car rather to the cabin so you will not get any iffy smells this unfortunately masks anything going wrong and specially masks and deforms noises. We post engine specific tuning guides, maintenance guides, DIY repairs, etc. My 2017 M240i with 27,000 kms is suffering from the same symptoms. First, let me say this is awesome info and Im grateful for it. Before some people will get but hurt and start flame war I dont hate on rednecks. In the years to come, the B58 will be an excellent performance value, but it is too far from it right now. Maybe FORD forums are for you? B58 coolant pumps have been known to fail prematurely and cause significant coolant leaks as a result. Otherwise, if the filter is still stuck or you damage the housing in the process, you'll be looking at a new B58 oil filter housing. Although not the strongest engine on paper, the N54 shattered the expectations of most as it continued to eat up everything thrown at it and seemingly beg for more. Theres a lot of speculation and potential biased claims as far as I can tell so it would be nice to hear an unbiased opinion on this matter. I bought it at about 75k. Hello, I own F20 120i 2018 with B48 engine (184hp). Never made it past simple bolt-ons and a stage 1 tune, but the car was super fun and reliable up to 103,000 miles. F11 151k miles (now only tuned by 30%, in the past was tuned onev 40%) Specialty tools assist in making the VANOS solenoid replacement straightforward. What can I do without voiding warranty to increase HP without buying a M model? 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. That could be said for many modern engines. Agree with you both there Tazzieman/Spjnr. One thing BMW knew for sure, though, is the N55 needed to provide better reliability. Ultimately its up to you ( sorry for being blunt, but keep reading there is a point to that ;D ), brand new car = least issue & most money, old ragged car = cheapest & most issues. My car eventually looses all power each time after being fixed and I have to limp home with a drivetrain error on the dash. I have a 440i with m performance and sound kit during cold start there is shaking in the car I can feel the shaking if I hold the stearing wheel with both of my hands I am not sure what might be causing the problem only have about 25k miles showed to dealer they dint find anything This applies to coolant hoses and coolant connecting flanges. Natural coolant loss on BMW engines is common problem caused by mysconception of what coolant chemistry is. 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. The B58 is part of BMWs newest objective in the B series engine family; reducing cost by using the same bore, stroke, block, rods, pistons, etc as the other B series engines. Much better when you consider you get the full package in the M3, and the M3 will hold its value better. DIY the basics (oil, brakes, spark plugs, etc) $500 to $1,200 a year The only real solution here is to replace the B58 water pump with a new or refurbished unit. Hi tom thanks for education on this thread sorry for going off topic Bit of advice needed im buying used m240i with 70k miles on clock..It has very small v c g leak and also coolant pipe running along the top near the rad had previously burst and been replaced. Thanks! Space is very limited but its doable. TuningPro.co is owned and operated by 8020 Media. 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. Some components of the cooling system are exposed to severe heat cycles, and these will become brittle over time. Woodcliff Lake, NJ - Jan. 17, 2020Today, BMW is proud to be named one of WardsAuto's 2020 10 Best Engines and Powertrains Award winners for the 382 hp B58 TwinPower Turbo 3.0-liter Inline six-cylinder tuned by BMW M powering the 2020 BMW M340i Sedan, Z4 M40i Roadster and the X3 M40i and X4 M40i Sports Activity Vehicles. Had the well known gasket issues. BMW Reliability Most Reliable BMW Engines. Soooo if you have some noise under load best record it from engine bay. Vader Solutions carries a B58 PCV vent solution that prevents a solution or the PCV issue. Sometimes, B58 coolant loss can be dependent on other things as well. In terms of engine and chassis design, BMW is still one of. Copyright 2021 - 2023 BMW Tuning LLC. Rear mounted VANOS and timing chain. Just remove all the plastic covers and you can get your hand back there. Original BMW coolant (the one in 1.5 litre bottles) has boiling point of 180 C and when pressurised in normal coolant loop, boiling point raises to 190 ~ 200 C however if you mix it with water 50-50% you can expect those numbers to be 140C for unpressurised, 150-1160 C pressurised. We are hoping to soon add an F80 M3 and F82 M4 GTS. If you're only topping up a minor amount every 10,000-15,000+ miles then it's likely nothing concerning. Over time, the housing and the electronics inside degrade and fail. Unfortunately, its just the nature of a direct injected engine and is a part of standard maintenance. 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. Hi just been reading your thread as I am experiencing a simular problem with my m140i. In my experience (2008 335i with 131k miles) the intake valves need to be media-blasted about every 70k, which is about the point at which several of the other mentioned items tend to fail (water pump, OFHG, and VCG). 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. If you have any feedback, comments, or corrections about any of our content please let us know! Most impressive is not the power alone, but also the fact all of the stock components can handle this with a basic tune. 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. Most B58 owners will have a trouble-free ownership experience and spend less on maintenance than if you were driving a N55-powered BMW. Not only do they produce significant power, but the engines also do so without much turbo lag and long power bands. 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. Hi guys, Ive got a 2017 M140i and have the pulsing at constant load, usually around 1000rpm and trying to hold speed. The engine room is simply too full with views inaccessible. Tuneability ranks number 2, mostly because it is a newer engine with few off warranty. Im impressed to say the least. Just purchased a 2021 M340. And thats the N54 which is regarded as one of the less reliable BMW engines. Thank you for the response and enjoyed the articles. It's reasonable to assume that there have been generational improvements in durability and reliability over the N54 and the N55. Do you want to get more excitement out of your B58-powered BMW? Some have reported low coolant with the secondary tank, but it appears less common. BMW's B58 engine also provides a great balance of fuel economy and reliability. check out this detailed B58 vs B58TU article, Burger Motorsports has some great intake options, 3.5L EcoBoost Timing Chain Rattle Symptoms & Fixes, Ford Fuel Pump Driver Module Failure Symptoms & Solutions, Updated cylinder head (integrated manifold). The B58 replaced the N55 and was launched in the F30 340i.. Your email address will not be published. Thanks for your help! Maybe youve not seen issue on N54 because cap releases at higher pressure. It is usually just one of the sensors but I would do both anyway. Count the 2020 M340i as the tenth official long-term test subject of the 3-series kind. The rough idle is a symptom of the VANOS solenoid. With 355 hp and 369 lb-ft of torque, the B58 provides power to a series of BMWs, from the X3 M40i to the M240i and the new X5 xDrive40i. Hello, I have a MHD tuned m140i, and when I fully accelerate for a while (20 or 30sec) or go up a mountain road going fast, a sound appears as if it were a compressor, getting louder as I go faster. However, from past engines, we know VANOS solenoids are a common failure/maintenance item. Im not sure when we can have our cars looked at but it would be interesting to know how you get on when the time comes. Merry Xmas all from Chris in Canberra, Australia! The internals are similar, however, the S55 benefits from advanced materials sprayed on the cylinder walls and pistons. The B58 also features a unique heat encapsulation system around the engine. Ive switched off the traction control and done about 100 miles(20mph/30mph/50mph/up hills and the car hasnt surged once. Acnam Infotech, BMW Tuning - BMW Performance & Tuning Guides, News, Videos. Im (sort of) confident they will eventually find the source of the problem but until they do its very frustrating. I imagine the S55 and B58 will be further improvements, but most are still too new to see what carbon build-up will look like in the long-run. Ill try to describe what I suspect as a secondary issue. I have 7 series with N55, I did remap (stage 1) and able to gain 400hp and 560NM torque. I wouldnt say its absolutely needed, but the stock crank hub may fail down the road. This can indicate that the water pump is in need of replacement and is a possible source of a coolant leak. Disintegrated oil filters pop up frequently, but are not serious in most cases. 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. Im trying my best to absorb as much as I can. 350-400whp will require at least a decent set of performance tires. when removing the reservoir cap, I noticed a bunch of crustiness. Stock Power: ~330hpWorld Record HP: 655WHPDisplacement: 2998cc (2.998L)Turbocharger: Single Twin Power TurboCompression: 11.0 to 1Bore x Stroke: 82.0mm x 94.6mm (3.23in x 3.72in)Internals: Forged crank and rods. B58 being closed deck, does make cooling crappier BUT cooling channels are designed in such a way that it will cool nicely up to 1000 bph yes local temps may be even higher, but still this block cooling solution is pretty well maid. Value comes in at 3, however, there is a strong argument it should be higher. 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. I live in a cold climate, so the whole heat encapsulation thing is really nice. I couldnt imagine them using it if there was in fact an issue. Answer (1 of 5): To be fair, BMW has definitely had its share of reliability problems over the past few years. I hope to get a 2015 M3 in a few years time as i would love to drive the S55! Cast pistons.Block Design: Closed DeckRedline: 7000. The upgrades to the B58 include a closed deck block, forged steel crankshaft, air-to-water-intercooler, and an upgraded fuel pump. Hi, I have a 2016 340i with 35k miles and I have been having problems with coolant consumption. Disclaimer: This site contains affiliate links. Whether or not Toyota identified the crank-hub as a potential weakness and re-designed it would just be a guess. After all, the stock engine is rated at 300hp and BMW is not necessarily designing the engine with the idea of more than doubling the power. Ok, definitely my thought process as well. 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 . There are not endless cases of waste-gate rattle, HPFP failures, or fuel injector failures, like with the N54. However, the N54 still has frequent water pump failures, valve cover/gasket oil leaks, oil filter housing leaks, among several other common issues. 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. I do love a straight 6. Check your turbo coolant level (smaller of the two reservoir caps). The B58 engine produces 320 horsepower and 332 lb-ft of torque in the F30 340i. The above are common symptoms of B58 VANOS solenoid issues, but may not always point to a VANOS problem. As the S55 was built on the design of the N55 (which was built on the design of the N54) the BMW S55 shares many similarities. Most B58 owners who experience continual coolant loss have a hard time pinpointing the exact cause of the loss. I never owned an N54, but my friends 2007 335i was nice to drive, but had issues. Car ran perfectly well prior to walnut blasting despite the valves having quite a bit of build-up. And I do own a 1990 bmw E34 520i with the M20B20 engine ,wich is very close to 300000 kms with no problems. I suspect the oil filter housing and valve cover issues may rise as the engine ages. Thank you. Cant wait to compare the BM3 to the Dinan Stage 1. Our site is dedicated to all things BMW Tuning related. It's worth a shot. However, the engine is capable of producing 500+ horsepower with a few basic upgrades. It's a pretty labor-intensive job. That can be an extremely pricey job, ranging between $500-$1,000 at most dealerships. Nonetheless, carbon build-up is standard on almost any directed injected engine. Notable changes from the N55. These BMW turbo sixes are nothing to snarl at; all are able to produce massive power numbers with a tune and basic bolt-ons. Certain G series models began receiving the updated B58TU1 in 2019. It cost about 180 Euro. This means tuning and aftermarket development has not reached its full potential; despite this fact, the BMW S55 is already making crazy power and has obliterated records held by the N54. Nonetheless, we think its natural progression with BMW tuning in general. Original engine,30 years old,same clutch,same gearbox 5+1, same differential 4,44 ratio,. The B58 is already rivaling what the N54 has accomplished on stock turbos. We recommend changing the oil soon after this occurs. It seems the coolant loss has now accelerated. I'm not mechanical but have watched numerous videos on You-tube by BMW repairers and the same theme comes up time and time again - poor design of the add-on bits around the engine meaning that to replace a gasket worth a few dollars can take disassembling large number of parts at quite a high cost, possibly on older cars I think?. Yes Im in the UK John. This can result in oil-rich gasses being pumped into the intake manifold. Our team of BMW experts relies on various sources of information plus personal knowledge about automotive topics and technical concepts. There are countless videos of B58 BMW owners with this exact symptom resulting from a damaged PCV. Of the engines referenced in this post Toyota is only using the B58. The BMW B58 engine can handle around 600-650whp and 550-600wtq on the stock block and internals. Love the car but hate the pain! Bit of methanol injection will help keep your intake valves cleaner. Two of our N54's are nearing 120,000 miles on original VANOS components. Excessive oil consumption is another big one that can alert you to this issue. It does not have signs of issues with any of its internal components. Its a pretty simple 20-45 minute install and uninstall. Thank you for your comment. My car is going in to BMW on Thursday. Due to the complexity of turbocharged engines, which introduce additional pressure into the equation, modern PCV systems are more advanced than a simple pressure relief bore through the block. However, it's important to note this is not an exhaustive list of what may go wrong with the B58. One dependable BMW engine, the N52 inline-6 featured in the E90 325i, 328i, and 330i, has already been covered in detail. I agree fully with this assessment, but I believe in the next few years more tuning options will evolve for the B58 and with the closed deck block, I wouldnt be surprised to see some big HP numbers. Everyone and their brother has done the LS swap and its become boring. Thanks Zach! Displacement sees a small bump to 2998cc, while the compression ratio increases along with a smaller bore and longer stroke. You are using an out of date browser. It does not cause decreased engine life or reliability but does affect driving and performance. Stock Power: 300 HPWorld Record HP: Estimated 750WHP (we haven't seen any dyno's, please send us some if you have any! Inline 6s are well known in Australia. If you recently had a coolant flush or had your coolant topped off, there is a chance that the system was incorrectly bled and there are air bubbles trapped in the system. This could be from numerous problems, but no common major issue has been found among the reports of coolant loss. what a great site you have! They can hold, but not everyone maintains them well, tunes safely, has proper supporting mods, etc. 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. Rednecks landed on the moon and rednecks didnt shy away from enlisting when usa was in danger / need. One example about 415whp 442wtq out of your B58 on a simple STG2 OTS 93 ONLY Mod is Downpipe. 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. (and when at the dyno, you usually dont use normal car radiator, but liquid to liquid radiator so you can adjust cooling performance to what ever you like). 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 high-pressure fuel pump issues that plagued the N54 was still an issue on early N55 models, however, the issue was resolved shortly after the release of the engine. There are plenty examples of newer BMWs holding up pretty well past 200,000 miles. Then remove and replace passenger side. Hardly worth mentioning as it is only a handful. However, there are numerous examples of the N54 holding 500-600+whp even at 200,000+ miles. The VC is prone to cracking and leaking, too. Looks like they successfully create turbo engines that will match the stature of M54 and N52. Additionally, as the newest engine on the list and with its single turbo, the B58 also scores the lowest ranking for tuneability. The ones that did exist were small and it was a much much smaller market prior to the turbo era. We use cookies to improve your experience on our website. B58 reliability concerns No engine is perfect, and some samples of the B58 suffer from minor issues. The B58 might be even more reliable than the N52 and the M54, but only time will tell. Expect B58 solenoid issues to arise around the 80,000-100,000 mile mark. 2015 335i 4 series coupe has been a great auto. Well, I have N54 running 550whp on td04s. **Ranks are as compared between the four turbo, inline 6 engines**. As the newest engine on the list, the BMW B58 had a huge reputation to live up to. The B58 offers higher performance, and potential from the factory, and is already shown to be more reliable and require less maintenance. . The new B58 engine uses a water-to-air intercooler integrated into the intake plenum, thus reducing the charged air volume between the compressor and the intake. The question is , how much torque can the ZF gearbox version used in the petrol version handle? Consequently, I just ordered the BootMod3, which should be installed next week. ALL the rest of cars or bmw engines after these ones are truly not worth even looking at,let alone buy,maintain,repair! 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. 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. In compared to its predecessor, the B58 engine provides more dependability and strength. Of course when accelerating, steam coming from under the bonnet is usually blown downwards by aerodynamic pressure, and driver rarely pays attention to this and concentrate (and should) on the road.
b58 engine reliability