[Mark e90]

How do I know if my car has n52 or n53 engine ? It's a 2006 325i 2497cc 218bhp I live in uk

[e90ftw]

The N53 came out in 2007. Check out http://www.bmwarchive.org/vin/bmw-vin-decoder.html

[E81]

There is no 2,5l 218bhp N53. So it must be N52.

[Saintor]

Originally Posted by E81

There is no 2,5l 218bhp N53. So it must be N52.

There was a 190HP version in 5-series.
http://en.wikipedia.org/wiki/BMW_N53

Engine Code Displacement Power Torque Bore Stroke Compression Year
N53B25-U0 2,497 cc (152 cu in) 140 kW (190 hp) @ 6100 rpm 235 N·m (173 lb·ft) @ 3500-5000 rpm 82.0 78.8 12.0:1 2007

[3s4u2]

06 325i - 330 has a N52
325i: 215 hp @ 6250rpm, 185 lb-ft. torque @ 2750 rpm, single stage induction system.
330i: 255 hp @ 6600rpm, 220 lb-ft. torque @ 2750 rpm, three stage induction system.