BMW Knowledge Base

BMW N55 Engine: Specs, Common Problems, Tuning, and Ownership Tips

The BMW N55 is a turbocharged inline-six produced since 2009. Learn its specs, common problems (oil consumption, injectors), maintenance schedule, tuning potential, and how it compares to the N54 and S55.

BMW X5 G05 40i Buying Guide: Is It Worth the Money?

BMW X5 G05 40i: Reliability, Longevity, and Owner Experience

BMW 1 Series F20 (2011-2015): The Complete Guide to Buying, Owning, and Servicing

A complete guide to the BMW 1 Series F20 (2011–2015): model overview, common problems, maintenance tips, a pre-purchase checklist, real-world fuel economy, and ownership costs. Find out whether this rear-drive hatchback is worth buying.

BMW X7 G07 xDrive40i: Buyer’s Guide — What to Check Before You Buy

A used X7 G07 xDrive40i is a balanced full-size luxury SUV with the B58 inline-six, ZF 8HP automatic, and xDrive. The main risks are the air suspension and the electronics. Here's what to inspect before you buy.

BMW X7 G07 xDrive30d Buyer’s Guide: Should You Buy One?

BMW N52 Electric Water Pump: Why It’s a Wear Item and When to Replace It

Why the BMW N52 electric water pump is a wear item, when to replace it, and how to avoid an expensive engine repair. Maintenance tips, replacement cost notes, and a buyer's checklist.

BMW M40B18 Engine: Specs, Problems, and Service Life

BMW M40B18 engine: specs, common problems, and service life. What to know about its design, maintenance, and what to check before buying a BMW with this engine.

BMW 5 Series G30 520d: Review, Test Results, and Real Owner Experience