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

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

A guide to Siemens piezo injector problems on the BMW N52 engine: failure symptoms, OBD2 code diagnosis, repair (cleaning vs replacement), prevention, and a checklist for buying a used car.

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Engine Mechanical ⚡ Express

BMW N74 Engine: Complete Overview, Problems, and Maintenance of the Twin-Turbo V12

A complete overview of the BMW N74 engine: technical highlights, common problems, maintenance, and a used-buying checklist. Find out whether a V12 BMW is worth buying in 2025.

Engine Mechanical ⚡ Express

BMW E36 M43B16: The Complete Guide to the 1.6-Liter Engine

A complete guide to the BMW E36 M43B16 engine: specs, common problems, maintenance and oil change advice, plus a buyer's checklist. Here's how to extend the engine's life.

Engine Mechanical ⚡ Express

Tuning the BMW N57 to 402 hp: Real-World Ownership, Oil, and Leaks

Real-world experience with a BMW N57 tuned to 402 hp and 575 lb-ft: oil choice, additive mistakes, change intervals, and heat management. Owner advice at 127,000 miles.

Engine Mechanical ⚡ Express

BMW F80 M3: Complete Guide to the S55 Engine, Problems, and Tuning

A complete guide to the BMW F80 M3: the S55 engine, common problems (crank hub, intercooler leaks), maintenance advice, a buying checklist, and tuning stages from Stage 1 to Stage 2. Learn how to extend your M3's life and avoid expensive failures.

Engine Mechanical ⚡ Express

BMW B58 Engine: Legendary Reliability and Tuning Potential for Your Car

The BMW B58 is a legendary inline-six widely regarded as one of the best engines in the world. Specs, chip tuning advantages, maintenance tips, and a buying checklist for cars with the B58.

Engine Mechanical ⚡ Express

BMW N62 Engine: Complete Guide to the Valvetronic V8

A complete guide to the BMW N62 engine: technical details, variants, the Valvetronic system, common problems, and maintenance advice. The full story on BMW's Valvetronic V8.

Engine Mechanical ⚡ Express

BMW M57TU Engine (E60): Reliability, Common Problems, and Tuning

The BMW M57TU diesel in the E60 explained: service life, typical problems, maintenance intervals, and Stage 1/Stage 2 tuning. Buying tips to extend the life of the engine.

Engine Mechanical ⚡ Express

BMW X4 M40i (B58): Complete Guide to the Engine, Problems, and Tuning

A complete guide to the BMW X4 M40i with the B58 engine: specs, common problems, maintenance tips, a used-buying checklist, and tuning from Stage 1 to Stage 3.

Engine Mechanical ⚡ Express

BMW B58 Engine: Reliability, Problems, and Tuning — The Complete Owner’s Guide

A complete guide to the BMW B58 engine: specifications, common problems, maintenance schedule, a used-buyer checklist, and safe tuning. Learn how to extend engine life and avoid a costly repair.