BMW X5 ECU Remapping & Engine Tuning

Which X5 engines gain the most?

Some of the smallest percentage gains on this page belong to the first-generation E53 V8s: the 2000–2003 4.4i goes from 286 to 305 bhp (+6%) and the 4.6is from 347 to 360 bhp (+3%). The E70 30i, with the naturally aspirated N52 3.0 six, goes from 272 to 287 bhp (+5%).

Turbocharging changes that. The turbocharged N55 six in the F15 35i goes from 302 to 352 bhp (+16%), and the E70 X5 M’s twin-turbo S63 V8 makes the largest increase in our X5 figures.

All X5 diesels are turbocharged, and the gains vary with how much the engine already makes. The F15 25d, the only four-cylinder diesel X5 we list, goes from 215 to 263 bhp (+22%). The E70 40d, with a twin-turbo N57 six, goes from 306 to 357 bhp (+16%). The M50d, whose N57S uses three turbochargers, starts from 375 bhp and reaches 420 bhp in the F15 (+12%). That is the smallest percentage gain of the F15 diesels, from the highest starting output, though it still adds 45 bhp and 80 Nm.

X5 generations we cover

E53 (1999–2006). The first X5 used the M54 3.0 six in the 3.0i, M62 and then N62 V8s in the 4.4i, the M62-based 4.6is and N62-based 4.8is, and the M57 3.0 turbodiesel six in the 3.0d.

E70 (2006–2013). Built from July 2006 to July 2013, with the N52 and later the N55 twin-scroll turbo six, the twin-turbo N63 V8 in the xDrive50i and the S63 in the X5 M, plus N57 diesels up to the tri-turbo M50d.

F15 (2013–2018). Built from April 2013 to July 2018. The 25d used the N47 2.0 and, from August 2015, the B47; the 30d and 40d used the N57 3.0, and the 50i the twin-turbo N63 4.4 V8.

G05 (2018 onwards). Built from August 2018, with the B57 3.0 diesel in the xDrive30d and the twin-turbo N63 V8 in the xDrive50i. Our G05 figures are still in development.

Last updated 19 October 2026