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 Engine: Reliability, Maintenance, and the Secrets to Long Life

The BMW N52 is a naturally aspirated inline-six that powered the E90, E92, and E93 from 2006 to 2013. Here's what you need to know about its specs, service schedule, common problems, and how to push it past 186,000 miles.

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Engine Mechanical ⚡ Express

BMW N20 Engine: Reliability, Problems, and the Complete Owner’s Guide

A complete guide to the BMW N20 engine: specs, common problems (timing chain, water pump, oil leaks), maintenance schedule, and a used-car buying checklist. Learn how to extend the engine's life and avoid costly repairs.

Engine Mechanical ⚡ Express

BMW F10 Chip Tuning: The Complete Stage 1 Guide for N20, N55, N52, N53, N47, N57

A complete guide to Stage 1 chip tuning the BMW F10 for the N20, N55, N52, N53, N47, and N57—power gains, maintenance after the flash, and the typical emissions problems.

Engine Mechanical ⚡ Express

BMW E60 N62: The Complete V8 Guide—Problems, Maintenance, and Buying Advice

A complete guide to the N62 V8 in the BMW E60: technical highlights, common problems (worn valve stem seals, coolant leaks, ignition coil failures), maintenance advice, and a pre-purchase checklist. How to extend the life of the V8 and avoid expensive repairs.

Engine Mechanical ⚡ Express

The Complete Guide to BMW N55 (F30/F31) Maintenance: Longevity, Problems, and Tuning

Complete guide to the BMW N55 engine in the 335i (F30/F31, 2012–2015): maintenance schedule, typical problems (cracked charge pipe, oil leaks, HPFP failure), tips for extending engine life, and safe tuning. Find out how to make your N55 last and avoid costly repairs.

Engine Mechanical ⚡ Express

BMW Knowledge Base

BMW N52 Engine: Reliability, Maintenance, and the Secrets to Long Life

BMW N20 Engine: Reliability, Problems, and the Complete Owner’s Guide

BMW F10 Chip Tuning: The Complete Stage 1 Guide for N20, N55, N52, N53, N47, N57

BMW E60 N62: The Complete V8 Guide—Problems, Maintenance, and Buying Advice

The Complete Guide to BMW N55 (F30/F31) Maintenance: Longevity, Problems, and Tuning

The Complete Guide to BMW Engines: Common Problems, Maintenance, and Pre-Purchase Inspection

BMW B58 Engine: Complete Guide to Operation, Common Problems, and Repair

BMW Timing Chain: How to Avoid a Costly Repair and Pick a Reliable Engine

Rating Criteria

What Limp Mode Looks Like on the BMW X5