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 X4 G02: Engines, Common Problems, and Buying Advice

A detailed look at BMW X4 G02 engines: B57D30, B58B30, B48, and B47. Typical faults, what to check on a used car, and maintenance tips. Learn how to extend engine life and avoid expensive repairs.

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Engine Mechanical ⚡ Express

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

The complete guide to BMW engines: typical problems of the B47/B57 diesels and B48/B58 gas engines, maintenance advice, and a checklist for buying used. Here's how to extend engine life and avoid a costly repair.

Engine Mechanical ⚡ Express

The Complete Guide to BMW B57, B48, and B58 Problems: What Every Owner Needs to Know

A complete guide to BMW B57, B48, and B58 engine problems: common failures, maintenance tips, and a used-car buying checklist. Find out how to avoid expensive repairs.

Engine Mechanical ⚡ Express

BMW B57, B48, B58, and N63 Engines: Complete Guide to Reliability, Problems, and Maintenance

A complete guide to the BMW B57, B48, B58, and N63 engines: longevity, common problems, maintenance tips, and a checklist for buying a used car.

Engine Mechanical ⚡ Express

BMW X7 G07 B57 30d ECU Tune: Bringing Out the Diesel’s Full Potential

An ECU tune takes the BMW X7 G07 B57 30d from 265 to 340 hp and 575 lb-ft, sharpening acceleration without sacrificing reliability. The process, the results, and the rules to follow.