BMW N57 Engine Problems: Common Faults, Symptoms & Fixes
Image: BMW N57D30B Complete Engine for Sale at MT Auto Parts, priced at £4,899.99 The BMW N57 is a 3.0-litre straight-six diesel engine that has powered a wide range of BMW models since 2008. In the F generation line-up, it appears in the 30d and 35d badged variants across the 3, 5, 7 Series, and X3-X7 models. It replaced the well-regarded M57 engine and, on the whole, earned a better reputation than BMW's troublesome N47 four-cylinder diesel, but it has its own set of known weaknesses. This article covers the most common N57 problems, what to look for, and what each fault typically involves to fix. N57 Engine Variants: What's in Your BMW The N57 comes in several main versions, ranging from single-turbo engines to more complex twin- and triple-turbo configurations. Understanding which one you have matters when sourcing replacement parts, as the turbocharger setup and engine specification can affect repair costs. N57D30A – Single-turbo unit producing around 245 PS (241 bhp). Fo...