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

Maintenance ⚡ Express

BMW ZF 8HP Transmission Fluid Change: Complete Owner’s Guide

A complete guide to ZF 8HP ATF changes on BMW: change intervals, fluid and pan selection, step-by-step instructions, service costs, and the mistakes owners make most often.

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Buying Guide Overview

BMW X5 G05 40i Buyer’s Guide: What to Check Before You Buy and Whether It’s Worth It

Car Overview Overview

BMW X5 G05 40i: Review and Ownership Experience

Car Overview Overview

BMW X5 G05 40i: A Closer Look at the Flagship B58 Crossover

Buying Guide Overview

BMW 5 Series G30 530d: Buyer’s Guide

Car Overview Overview

BMW 530d G30 (2017): Diesel 5 Series Review — The Best Compromise in Its Class

Engine Mechanical ⚡ Express

BMW N62B48 Engine: A Complete Guide to Problems, Maintenance, and Ownership

Complete guide to the BMW N62B48 engine: specs, common problems (oil consumption, coolant leaks, ignition coil failures), maintenance tips, and a checklist for buying a BMW with this motor.

Car Overview Overview

BMW 3 Series G20 330i: Review, Test Drive, and Owner Impressions

Car Overview ⚡ Express

BMW 7 Series G11: Complete Guide to Reliability, Problems, and Maintenance

A complete guide to BMW 7 Series G11 (2015–2022) reliability: common problems, maintenance advice, and a pre-purchase checklist. Learn the weak spots in the air suspension, electronics, and engines to avoid costly mistakes.

Engine Mechanical ⚡ Express

M52 Engine Repair on the BMW E39: Head Gasket Replacement and Common Problems

A detailed guide to repairing the M52 engine in the BMW E39: head gasket replacement, diagnosing common failures (air in the cooling system, stripped threads), tips for extending engine life, and repair costs.