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 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.

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Maintenance ⚡ Express

BMW N52 Engine: The Complete Guide to Maintenance and Reliability

A complete guide to BMW N52 maintenance and reliability: specifications, service intervals, common problems, a pre-purchase checklist, and tips for extending engine life.

Car Overview Overview

BMW X5 G05 40i: Overview, Owner Experience, and Verdict

Car Overview Overview

BMW 3 Series G20 320d: Full Review and Owner Experience

Car Overview ⚡ Express

BMW F30: The Complete Guide to Reliability, Common Problems, and Picking the Best Engine

Everything to check before buying a used BMW F30: N20 timing chain risks vs the B48, common problems, a pre-purchase inspection list, and realistic running costs. Pick the right engine and avoid expensive repairs.

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.

Car Overview ⚡ Express

BMW E34 M5: The Complete Guide to S38 Engines, Tuning, and Buying

A complete guide to the BMW E34 M5: S38B36 and S38B38 engines, tuning, common problems, maintenance advice, and a buyer's checklist. Find out whether the legendary sports sedan is worth buying in 2025.

Buying Guide Overview

BMW 530d G30: Buyer’s Guide

The BMW 530d G30 pairs the 265-hp B57 diesel with ZF's eight-speed 8HP automatic. What to check before you buy: service history, EGR, AdBlue, cooling, and transmission fluid.

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.

Car Overview ⚡ Express

BMW M5 F90 (S63B44T3): The Complete Guide to Tuning, Reliability, and Buying

A complete guide to the BMW M5 F90 (S63B44T3): tuning from Stage 1 to a full build, reliability, weak points, and a used-car checklist. Here's how to make 700+ hp without opening the engine.