What Are Common BMW S55 Engine Problems? M3 and M4 Owner Guide
Photo by eloy on Unsplash The S55 has a reputation that precedes it. Not for the reasons the N54 or early N63 do, not because it's plagued with catastrophic design flaws or secretly terrible, but because it powers the F80 M3 and F82 M4, and M car, which owners talk a lot. Online forums, YouTube teardowns, tuner blogs. Every fault gets scrutinised at a level that a standard 340i owner would never recognise. The engine itself, when you strip away the noise, is genuinely good. BMW's M division built it from the ground up, with a closed-deck block, forged internals, a 7,600 rpm redline for a turbocharged six, and it launched in 2014 in one of the most discussed M cars of the modern era. It powers the F80 M3, F82/F83 M4, and, in the Competition specification, the F87 M2. If you own one of these cars, this guide is written for you. We're going to be straight with you about what actually goes wrong, how often, and what to do about it. Some problems are real and need attention. S...
