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

Model:

All 3-er G20 3-er F30 5-er G30 5-er F10 5-er E60 X3 G01 X3 F25 X4 G02 X5 G05 X5 F15 7-er G11/G12

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.

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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.

Car Overview Overview

BMW 3 Series G20 330i Test Drive: Sport, Comfort, and Technology

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BMW 5 Series G30/G31: The Complete Guide for Owners and Buyers

Model overview, common problems, recall history, maintenance tips, and a used-car buyer's checklist for the BMW 5 Series G30/G31.

Car Overview Overview

BMW 5 Series G30 520d: Owner Experience, Test Drive, and Buying Guide

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BMW E38 (1994–2001): A Guide to the Legendary 7 Series for Owners and Buyers

A complete guide to the BMW E38 (1994–2001): engineering highlights, body weak spots, engine overview, maintenance schedule, and a buyer's checklist. How to choose one and keep the legendary 7 Series running.

Car Overview Overview

BMW X7 G07 xDrive40i: Review and Real-World Ownership

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BMW F30: Full Breakdown of Problems, Reliability, and Buying Guide

A complete breakdown of BMW F30 problems: common failures in gasoline and diesel engines, suspension, and electrics. Buying advice for used examples, an inspection checklist, and maintenance recommendations. Based on owner and BimmerB expert experience.

Car Overview Overview

BMW 330i G20: Owner Experiences, Test Drives, and Verdict

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BMW X5 E70: The Complete Guide to Buying, Ownership, and Maintenance

A complete guide to the BMW X5 E70 (2006–2013): the N52, N62, N63, and M57 engines, common failures, maintenance, ownership costs, and a checklist for buying a used one.