Which BMW Has the B47TU (Updated B47)? Models & Changes Explained
Photo by Rana Singh on Unsplash The BMW B47 diesel is one of the more important engines in the current used BMW market. It powers more models than almost any other unit in BMW's lineup, from the entry-level 318d to the X5 30d. Most buyers know the B47 as 'the diesel that replaced the N47 and fixed the timing chain problem.' That's accurate as far as it goes, but there's more to the B47 story, and the B47TU (Technical Update) is a significant revision that many owners don't know they have. This guide covers which cars have the standard B47, which have the B47TU, what changed between them, what goes wrong on each, and whether the reliability improvements are as meaningful as BMW claims. B47 vs B47TU: What's the Difference? The original B47 (2014–2018) BMW introduced the B47 in 2014 as the direct replacement for the N47 diesel. The headline improvement was the timing chain, moved from the rear of the engine to the front, making it significantly cheaper and easi...
