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 B58 Engine: Complete Guide to Operation, Common Problems, and Repair

A complete guide to operating and repairing BMW's B58 engine. Common problems: oil consumption, the timing chain, the turbo, the ZF 8HP transmission, electrics, suspension, and the cooling system—plus maintenance tips to extend engine life.

Read the article

Engine Mechanical ⚡ Express

BMW B58 Tuning: How to Tap the Hybrid Motor’s Potential—and Forget Its Drawbacks

How a B58 tune solves the hybrid motor's problems: it compensates for power loss on a depleted battery, sharpens throttle response, and delivers up to 510 hp. Includes maintenance advice and a checklist for buying used.

Engine Mechanical ⚡ Express

BMW B58 Engine: The Complete Guide to Tuning, Problems, and Maintenance

A complete guide to the BMW B58 engine: specs, common problems and their fixes, maintenance tips, a used-car buying checklist, and tuning stages. Learn how to extend the engine's life and avoid mistakes when building power.

Engine Mechanical ⚡ Express

BMW G11/G12 (2015–2016): Technical Secrets of the B58 and N63 Engines

The technical secrets of the B58 and N63 engines in the BMW G11/G12 (2015–2016): Valvetronic innovation, SCC segment cooling, 8th-generation Bosch DME modules, and the 8HP50/75 transmissions.

Engine Mechanical ⚡ Express

BMW B58 Engine: Lifespan, Problems, and Maintenance (2016–2022)

The BMW B58 is a turbocharged 3.0-liter inline-six gasoline engine in production since 2016. Here's what owners need to know about its lifespan (over 310,000 miles), the common failure points (oil pump, PCV valve, coolant leaks), and how to maintain it properly.

Engine Mechanical ⚡ Express

BMW B58 Engine: Legendary Reliability and Tuning Potential for Your Car

The BMW B58 is a legendary inline-six widely regarded as one of the best engines in the world. Specs, chip tuning advantages, maintenance tips, and a buying checklist for cars with the B58.

Engine Mechanical ⚡ Express

BMW X4 M40i (B58): Complete Guide to the Engine, Problems, and Tuning

A complete guide to the BMW X4 M40i with the B58 engine: specs, common problems, maintenance tips, a used-buying checklist, and tuning from Stage 1 to Stage 3.

Engine Mechanical ⚡ Express

BMW B58 Engine: Reliability, Problems, and Tuning — The Complete Owner’s Guide

A complete guide to the BMW B58 engine: specifications, common problems, maintenance schedule, a used-buyer checklist, and safe tuning. Learn how to extend engine life and avoid a costly repair.

Engine Mechanical Overview

BMW B58 vs S58

The B58 and S58 are both modern turbocharged inline-sixes from BMW's modular engine family — the B58 as the series-performance engine (M340i, M440i, X3/X4 M40i, Z4 M40i, Toyota Supra MK5), the S58 as the M-sport unit with two mono-scroll turbos (M3 G80, M4 G82, X3M, X4M). The architecture shares its bore

Engine Mechanical ⚡ Express

BMW B58 Engine: Reliability, Problems, Tuning, and the Complete Owner’s Guide

A complete guide to the BMW B58 engine: specs, common problems, maintenance schedule, used-buying checklist, and safe Stage 1 tuning. Here's how to get 217,000 miles out of this engine.