BMW B37 Engine Problems: Common 1.5 Diesel Faults Explained
Photo by Konrad Bednarek on Unsplash The BMW B37 engine is a 1,496 cc three-cylinder turbocharged diesel introduced in 2014 as part of BMW's modular engine family. The B37 was replaced by the four-cylinder N47 in the entry-level positions of several F-generation BMW models. The N47 offered lower fuel consumption and reduced emissions in a compact package. With only minor calibration differences, it was also used in MINI Cooper D models from the F56 and F55 generations onwards. In the UK, the B37 is most commonly found in the 116d (F20/F21), 216d Active Tourer (F45) and Gran Tourer (F46), and X1 sDrive16d (F48). Depending on the variant, it produces between 94 and 114 HP, with torque figures varying by model and specification. The B37C15U0 delivers around 114 HP, while the lower-output B37C15K0 produces approximately 94 HP in models carrying the 114d and 214d badges. This article covers the faults that appear most often on B37-powered cars: what causes them, what to look and list...