My salesman said my 05 525i had a 3.0l. I kept saying are you sure and bought it thinking it was definately a 2.5 despite what he said. Then I got the spec sheet from the parts department and that confirmed it. You would think a BMW salesman would know what engine is in the car. He also didn't tell me about the heated steering wheel, power headrests, and various other little things .

 

I still have the 325 06 with 215HP and it's fast enough for me. OP, did you check how fast other cars are of the same year that's comparable to your car? Just because your BMW might not be as fast as the years after it doesn't mean it's not fast at all; especially for it's year. Also, I highly doubt anybody else will know what you are really packing under the hood anyways since you do have a 525i that's E60. Most people, including E60 owners, might not even be able to tell the difference in your E60 compared to later models because the resemblance is almost the same. Someone can easily just assume you are driving a 07 525 with 215HP. Cheer Up. You got a BMW.

 

The 2007 530i possesses a wonderfully smooth, refined engine. I leased mine, knowing that the 535i was around the corner (although the incentives were enormous too). No regrets. I think the 530i and the 330i are real gems.