Engine Systems & Internals

BMW Engine Swaps — What Fits Where Engine swaps are a time-honored BMW tradition. The modular engine design and shared platforms make many swaps surprisingly straightforward…

BMW N47 Diesel Engine — Timing Chain Failure Explained Overview The N47 is BMW's 2.0-liter four-cylinder turbodiesel, produced 2007-2014. It's a capable and efficient engine, but…

BMW S54 Engine — The E46 M3 Legend Overview The S54 is BMW M's 3.2-liter naturally aspirated inline-six, powering the E46 M3 (2000-2006). It's widely considered one of the…

BMW S65 V8 — The Only V8 M3 Engine Ever Made Overview The S65 is a 4.0-liter naturally aspirated V8 that powered the E90/E92/E93 M3 from 2007-2013. It's the only V8 ever fitted…

BMW VANOS — How Variable Valve Timing Works What Is VANOS? VANOS (VAriable NOckenwellen Steuerung — Variable Camshaft Control) is BMW's variable valve timing system. It adjusts…

BMW N74 V12 — The Last Twelve-Cylinder Overview The N74 is BMW's 6.6-liter twin-turbocharged V12, used exclusively in the 7 Series and Rolls-Royce models. It's the last V12 BMW…

BMW B57 Diesel — Modern Six-Cylinder Turbodiesel Overview The B57 is BMW's modular 3.0-liter inline-six turbodiesel, replacing the N57 from 2016. Part of the same modular family…

Stage 1 vs Stage 2 vs Stage 3 — What's the Difference? You'll see these terms everywhere in the BMW tuning world, but they're not standardized — different tuners define them…

BMW Valvetronic Fault — Diagnosis and Fix A Valvetronic fault puts your BMW into a reduced-power limp mode. Here's what's happening and how to fix it. What You'll See "Drivetrain…

BMW Misfires — Finding the Cause A misfire means one or more cylinders aren't firing properly. It's one of the most common BMW issues and can range from a €30 spark plug to a…