Please debate, disagree, call me stupid ... ... I'd like the possibility of getting a bit smarter on all of this. And I'd like my timing corrections to drop - I'm pretty sure my setup is at fault. What’s your experience with N54 spark plugs & gapping? What do you run and what are your mods, boost, & power? These plugs are suggested for most turbo BMW motors including the N20, N54, N55, S55, N63, N63TU, S63, and S63TU applications. Note BMW B58 uses a different NGK part found here.

For a customer to request reimbursement for a “qualifying customer-pay repair” performed either by an authorized BMW center or independent repair shop located in the United States (including Puerto Rico), please have him/her submit his/her reimbursement request “online” at www.BMW-RP.com . For the above-referenced vehicles, BMW of North America, LLC (“BMW NA”) is extending the limited warranty for the fuel injectors to: NGK is the brand leader in the UK spark plug market and are the world’s biggest supplier to many major car manufacturers. Each and every one of their products are designed to meet the most rigorous standards and are the professionals’ choice because of their quality and technical excellence. Their plugs can be found in use by teams in F1, WRC and MotoGP. Put simply, NGK genuine spark plugs are the workhorse at the heart of smooth-running engines around the world. Moving over to a 1-step colder NGK spark plug did seem to help clean up timing and misfires became less common. Exact results can vary from car to car. Still, the OEM plugs can start becoming more problematic too far beyond 400whp. If you’re around that number and aren’t having issues then there isn’t much reason to change things. Can you speak on the impacts of running WMI and how that relates to the spark plug setup? Does WMI sufficiently cool the engine enough to make up for a full 1 step colder? What about gap sizing?

It’s important to have the right spark plug setup on your modded N54 engine. They’re pretty simple parts but play a major role in proper engine operation. With many different considerations it can be challenging to determine the best setup for your BMW. Determining the right N54 spark plugs and gapping isn’t a perfect science, but there are general guidelines to follow. I don't believe I should see any oil or carbon on the spark plug crush washer or head spark plug mating surface. This would seem to indicate that the plug washers are not sealed, correct?

These aren’t exhaustive lists, but a few common BMW spark plugs. Champion are OEM on many newer BMW engines. Bosch and NGK are also common OEM spark plugs for BMW. N54 1-Step & 2-Step Colder Spark PlugsWhen installing the plugs with Precision Raceworks coils on the N55 engine, we recommend setting the gap down to 0.022" While colder options may exist the 1-step and 2-step colder spark plugs are the most common choice on the N54. Among the two most popular are the NGK 97968 1-step colder and NGK 97506 2-step colder. These are generally good options even for 600-700+whp builds, which is why we don’t fully agree with the 75-100 horsepower rule. As you increase boost and power on the N54 you’re increasing cylinder combustion pressures. That leads to more heat than the N54 OEM Bosch spark plugs were designed to handle. In turn that may cause pre-ignition and spark plug overheating. Not good. However, going too cold can cause spark plugs to foul faster than normal. This is because colder plugs may remove too much heat and not successfully burn off deposits. Even then it’s best to run the factory gaps and adjust as necessary if you start noticing misfires or other issues. Some people instantly recommend gapping down to 0.022″, 0.020″ or 0.018″. We think it’s too aggressive for most, but there are some general guidelines. Here’s a rough breakdown:

I don't know if anyone is paying attention to their plugs - but the 95770 have use once double wall aluminum crush washers. I would love someone to debate this. Mine have been in and out several times in 7k miles and I think that's an issue.

deeper into the chamber is a country mile inside of a combustion chamber, and short of getting in the way of the spray pattern, would seem to be a good thing. Laser Iridium spark plugs provide superior ignitability and long service life. The smallest tip diameter available ensures slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions. Which spark plug is right for each person, engine, mods, tuning, etc can vary a lot. That’s why we put some larger and overlapping power levels above. It’s not like all OEM spark plugs are going to start having endless issues right at 375-400whp. Likewise, 2-step colder spark plugs are probably OK even at 400whp. Okay its gotten to that point where the influx of newcomers to the platform is rapidly rising and there are several common questions that get asked repeatedly and this will focus on a few maintenance items. For the sanity of the veterans to the platform, it is nice to have threads like these to reference. This post will hopefully answer some of those questions and I will update this as much as possible as information evolves. Lets get to it: The factory N55 spark plugs are the Bosch ZR-5-TPP-33 and are a decent option for the N54 too. They’re actually 1-step colder than the N54 spark plugs, so they can help support some extra power. We prefer moving to an iridium spark plug – like the NGK options – at roughly 450-500+whp levels. Even below that we would still opt for the NGK 97968 1-step colder N54 plugs.

These plugs are suggested for most turbo BMW motors including the N20, N54, N55, S55, N63, N63TU, S63, and S63TU applications. Below we’ll list a few of the best spark plugs for the BMW N54 engine. Many of these are highly proven spark plugs. However, there are other good options that people have success with. As such, this isn’t an exhaustive list of all plugs for the N54 engine. These are simply products we recommend based on personal experience running these on our 2007 335i, 2008 135i, and 2008 535i. I should be in the 475 – 500 WHP range so I am just curious if you would recommend deviating from the recommendations above considering the WMI setup. Ultimately, there aren’t perfect answers to any of these questions and sometimes it requires some experimenting. Following the general guidelines won’t hurt, though. We’ve found a lot of these guidelines work well on most N54 spark plugs. The ceramic insulation for the ground electrode on the 97506 is 5mm wide inside the steel shaft, versus 3.8mm for the 95770.I am boosting up as much as 21 – 22 PSI as I don’t care if the turbos go out because I am planning to go larger. NGK is the brand leader in the UK spark plug market and are the world's biggest supplier to many major car manufacturers. Each and every one of their products are designed to meet the most rigorous standards and are the professionals' choice because of their quality and technical excellence. Their plugs can be found in use by teams in F1, WRC and MotoGP. Put simply, NGK genuine spark plugs are the workhorse at the heart of smooth-running engines around the world. There should be NO carbon or oil on the crush washer or the head seating area, yet I have it on multi-install 95770s all torque to spec. I would love someone to debate this as well. For a B58 Engine with a Stage 1 or Stage 2 tune, you will need the Genuine BMW B58 High Power Stage 1/2 Spark Plugs