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

Car Overview Overview

BMW 5 Series G30 530d: Long-Term Ownership and Reliability

Read the article

Engine Mechanical ⚡ Express

BMW S58B30: Complete Guide to the Engine, Problems, and Maintenance

A complete guide to the BMW S58B30: specifications, common problems (cooling system, oil consumption, rear subframe squeak), maintenance intervals, and a used-car buying checklist. Find out whether a BMW with this engine is worth buying.

Electrical System ⚡ Express

Hidden BMW Features: The Complete Coding and Setup Guide for Owners

The complete guide to BMW coding: the top 8 hidden features, step-by-step instructions, common mistakes, and a checklist for buying a used car. Learn how to activate Brake Force Display, full-screen CarPlay, and other options.

OBD-II Diagnostics ⚡ Express

P0340 on BMW M52TÜ: Why You Shouldn’t Replace the Exhaust Camshaft Sensor

The P0340 code on a BMW M52TÜ often points to the wrong sensor. Here's how proper diagnosis with a multimeter saves you from wasting money on the exhaust camshaft sensor—and which parts to buy.

Engine Mechanical ⚡ Express

BMW M52B28 Tuning: From Stock to Turbo — The Complete Engine Guide

A complete guide to tuning the BMW M52B28: from diagnosing the stock engine to running a turbo at 1.2 bar. Learn how to catch the typical problems, prep the engine for more power, and hit 400+ hp.

Maintenance ⚡ Express

The complete guide to BMW N52 engine maintenance: intervals, CBS, and common problems

A complete guide to BMW N52 engine maintenance: CBS service intervals, common problems, recommended parts, and a checklist for buying a used car.

Engine Mechanical Overview

BMW Engines by Year of Production — All Series

This chronological overview lines up every major BMW engine by production period. Ideal for matching an engine to its vehicle generation and for understanding the arc of BMW's engine development.

OBD-II Diagnostics Overview

BMW Oxygen Sensor: Control and Diagnostic

Sensor aging, trouble codes 2C77/P0135, and the difference between the pre-cat and post-cat sensors.

Engine Mechanical ⚡ Express

BMW N52 Engine: Problems, Service Life, and Reliability Secrets

The BMW N52 is a four-cylinder turbocharged engine (2011–2017). Learn its typical problems: timing chain, carbon buildup on the valves, oil leaks. Service life up to 199,000 miles. Maintenance tips and a buying checklist.

Engine Mechanical ⚡ Express

BMW N52 Engine: Problems, Service Life, and Ownership Secrets

The BMW N52 is a legendary naturally aspirated engine produced from 2004 to 2015. What to watch for—and what to check before buying one.