MT Auto Parts Blog | Expert Tips for BMW enthusiasts on BMW Parts, Accessories, Engines and More

  Photo by Sevak Khachatoorian on Unsplash The BMW N20 engine has a complicated legacy. Introduced in 2011 as a replacement for the naturally aspirated N52 six-cylinder, the N20 was BMW's first turbocharged four-cylinder in the modern era — a 2.0-litre unit designed to deliver six-cylinder performance with four-cylinder economy. In terms of outright capability, it largely delivered on that promise. In terms of long-term reliability, it developed a reputation that is difficult to ignore. If you own an N20-powered BMW or are considering buying one, this guide covers everything you need to know: what goes wrong, when it goes wrong, how serious each fault is, and what the repair costs look like in the UK. What Is the BMW N20 Engine? The N20 is a 2.0-litre turbocharged inline-four petrol engine fitted across a wide range of BMW models from 2011 to approximately 2017, when it was progressively replaced by the B48. The N20B20A is the primary variant — the code you'll see in parts cata...

Image: BMW B48B20A complete engine with just 25K miles for sale at MT Auto Parts for £1,899.99 The BMW B48 engine has a strong reputation, and for good reason. Introduced in 2015 as the replacement for the N20, the B48 2.0-litre turbocharged four-cylinder addressed most of the complaints that had dogged its predecessor and arrived as part of BMW's thoroughly engineered B-series modular engine family. In nearly a decade of production, it has proven to be a capable, enjoyable engine that holds its own against comparable units from Audi and Mercedes. That said, it is not without its issues. The B48 has specific weaknesses that owners and prospective buyers should know about. Not because they make it a bad engine, but because knowing what to watch for is the difference between a £200 repair and a £2,000 one. This guide covers everything: what the B48 engine is, which cars it powers, what goes wrong, how to maintain it, and what to look for if you're buying a B48-powered BMW or loo...