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 E90 (2005-2011): Buying, Owning, and the Reliability Secrets of the Legendary 3 Series

The BMW E90 (2005-2011) is the iconic 3 Series and still the benchmark for handling. Inside: the N52, N54, N55, N47, and N57 engines, common problems, the maintenance schedule, and a pre-purchase checklist—plus how to extend the car’s life and avoid costly repairs.

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BMW 5 Series G30 530d: The Diesel Six, Reviewed

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Common BMW Problems: A Complete Fault Guide for Owners

A complete guide to common BMW problems: N20, N55, B48 and B58 engines, the N47 diesel, the ZF 8HP transmission, suspension, body and electronics. Learn how to extend your car's life and avoid expensive repairs.

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BMW 1 Series (F20/F21): Hidden Problems and a Complete Buyer’s Guide

An in-depth buyer's guide to the BMW 1 Series F20/F21: hidden problems of the N47 diesel and N13 gasoline engines, engine reliability ratings, a buyer's checklist, and maintenance tips. Find out how to avoid costly repairs.

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BMW 5 Series G30 530d: Engineering Breakdown and Ownership Experience

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BMW E46: The Complete Guide to Weak Spots and Common Problems for Owners

A complete guide to BMW E46 weak spots: engine, transmission, electrical, and body. Learn the typical problems, symptoms, and fixes—plus a pre-purchase inspection checklist.

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BMW F10 (N20): A Complete Breakdown of Problems, Longevity, and Cost of Ownership

A complete look at the BMW F10 with the N20 engine: common problems (timing chain, oil consumption, VANOS), weak points in the transmission and chassis, a buyer's checklist, maintenance advice, and cost of ownership.

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BMW X3 F25: The Complete Guide to Reliability, Problems, and Maintenance

A complete guide to BMW X3 (2010–2017) reliability: typical N20, N55, and N47 engine problems, maintenance advice, and a pre-purchase checklist. Learn how to extend its service life and avoid expensive repairs.

Car Overview Overview

BMW X7 G07 xDrive40i: Overview, Reliability, and Owner Experience

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BMW 1 Series E87 With the N52 Engine: Complete Overview, Problems, and Maintenance

A complete overview of the BMW 1 Series E87 with the N52 engine: specs, common problems, maintenance tips, and a checklist for buying a used car.