BMW Knowledge Base

E90 Weak Spots Depend on the Engine

E90 won't start: N47/N57 often a fuel issue (injector return), N54 the HPFP, and on every engine the usual suspects are the battery / IBS sensor on the negative terminal.

BMW E60 Limp Mode: Engines, Causes, Diagnosis

E60 limp mode: M57 swirl flaps snap off and get sucked into the engine, N47/M57 EGR cokes up, N54 HPFP, N62 VANOS.

BMW X3 G01 xDrive20d (B47) — Overview

The X3 G01 xDrive20d is the best-selling X3 in Germany. A B47 four-cylinder diesel with xDrive and the ZF 8HP — an efficient compact SUV with real towing capacity and everyday practicality.

BMW 5 Series G30/G31: Overview, Weak Spots, and Buying Guide

The G30/G31 uses BMW's modular B-series engines throughout (B47, B48, B57, B58) with SCR/AdBlue on the diesels. Main topics: B58 coolant loss, NOx sensors, the AdBlue system, mild-hybrid items from the LCI onward, and occasional transmission limp mode on outdated software.

Pre-Purchase Guide: Is a Car Buying Service Worth It for a BMW X7 G07 xDrive30d?

BMW X7 G07 xDrive30d Buyer’s Guide: Reliability and Common Problems

How the Ignition System Works

BMW ignition coils are a common wear item on gasoline engines from the N52 onward. Failures cause misfires, limp mode, and catalytic converter damage. Pairing the job with spark plug replacement is the standard maintenance package.

BMW 3 Series G20 320d (B47): Diesel Reliability, Longevity, and Owner Experience

BMW X5 G05 40i: Reliability and Long-Term Ownership Experience