BMW X3 ECU Remapping & Engine Tuning

Which X3 engines gain the most?

The second-generation F25 xDrive28i was sold with two quite different engines, so check which one your car has. With the naturally aspirated N52 3.0 six it goes from 255 to 275 bhp (+7%). With the N20 2.0 turbo four-cylinder it goes from 241 to 283 bhp (+17%), so after a remap the smaller turbo engine is 8 bhp stronger than the six, and it gains 100 Nm of torque against the six’s 36 Nm.

The first-generation E83 petrols gain less than the turbocharged F25. The 3.0si, with the naturally aspirated N52, goes from 272 to 287 bhp (+5%), and the N46-engined 2.0i from 150 to 168 bhp (+12%).

The E83 diesels are all turbocharged. The M57 3.0 six in the 2004–2010 3.0d goes from 218 to 248 bhp (+13%), and the 3.0sd, its most powerful version, from 286 to 316 bhp (+10%). On the G01, the B47-engined xDrive20d goes from 188 to 218 bhp (+15%); most of the other G01 figures, including every petrol, are still in development.

X3 generations we cover

E83 (2003–2010). The first X3 was built from August 2003 to August 2010. Petrol engines were the N46 2.0 four and M54 and then N52 2.5 and 3.0 sixes; diesels were the M47 and later N47 2.0 and the M57 3.0, including the 3.0sd.

F25 (2010–2017). Built from September 2010 to August 2017. The xDrive20d and sDrive18d moved from the N47 to the B47 2.0 in 2015, the xDrive30d used the N57 3.0, and the xDrive28i was offered with both the N52 six and the N20 turbo four.

G01 (2017–2024). Built from August 2017 to August 2024, with B47 and B57 diesels, B48 2.0 petrols and the B58 3.0 six in the M40i. The X3 M, coded F97, is a separate model that we don’t list here.

Last updated 19 October 2026