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 B47: The Complete Diesel Engine Guide for BMW Owners

A complete guide to the BMW B47 diesel: specs, real-world fuel economy, common problems (balance shaft, oil leaks), the service schedule, and a used-car buyer's checklist. Find out how to extend engine life to 186,000 miles.

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Engine Mechanical ⚡ Express

BMW B47 Engine: Service Life, Problems, and Ownership Secrets

The BMW B47 is a dependable 2.0-liter diesel producing 197 hp and 295 lb-ft of torque. Learn about its real service life, typical problems, how it stacks up against the N47, and the operating tips that extend its life.

Engine Mechanical ⚡ Express

BMW B47 and B48: Everything You Need to Know About Engines, Problems, and Maintenance

A complete breakdown of the BMW B47 (diesel) and B48 (gasoline) engines: specs, fuel economy, common problems (timing chain, oil consumption, corrosion), maintenance tips, and a used-market buying checklist.