BMW Knowledge Base

Technical articles, diagnostic guides and deep dives into problem BMW components.

951 articles in the base · updated regularly

All Cooling System 22 OBD-II Diagnostics 34 Transmission 16 Buying Guide 60 Engine Mechanical 377 Car Overview 327 Maintenance 47 Suspension 1 Electrical System 24

Engine series:

All B47 B48 B57 B58 N20 N47 N52 N57 S55 S58

Engine Mechanical ⚡ Express

BMW N52 Diagnostics: The Complete Guide to Fault Codes, Maintenance, and Repair

A complete guide to BMW N52 diagnostics: common engine, transmission, and electrical faults, plus maintenance advice. Find out how to extend engine life and avoid costly repairs.

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Engine Mechanical ⚡ Express

BMW N52 Engine: Complete Guide to Ownership, Problems, and Tuning

A complete guide to the BMW N52 engine: specs, common problems, service intervals, a pre-purchase checklist, and tuning advice. Learn how to make this naturally aspirated inline-six last.

Engine Mechanical ⚡ Express

BMW N52 Engine: Service Life, Common Problems, and Valve Stem Seal Repair

BMW N52 engine overview: design, common problems (worn valve stem seals, coked piston rings, PCV valve failure, timing chain stretch), pre-purchase inspection, a step-by-step seal replacement guide, mechanic tips, and a maintenance schedule to extend engine life.

Engine Mechanical ⚡ Express

BMW Knowledge Base

BMW N52 Diagnostics: The Complete Guide to Fault Codes, Maintenance, and Repair

BMW N52 Engine: Complete Guide to Ownership, Problems, and Tuning

BMW N52 Engine: Service Life, Common Problems, and Valve Stem Seal Repair

BMW N52 Engine: Reliability, Problems, and the Complete Owner’s Guide

Siemens Piezo Injectors on the BMW N52: Problems, Diagnosis, and Repair

Oil Burning on the BMW N52B25: Causes, Diagnosis, and E90 Engine Repair

BMW E60 N52 Coolant Pipe Repair: Why It Leaks and the Aluminum Fix

BMW N52 Engine: A Complete Guide to Problems, Maintenance, and Lifespan

The Complete Guide to Cleaning Sludge and Deposits from a BMW N52 Engine

BMW Reliability Secrets: How to Extend the Life of the N52, N54, N47, N20, and M54 Engines