BMW just bought back our 135i 2 weeks ago under CA Lemon Law over the HPFP on the N54 engine. I had it fail completely at high speed several times. Reduced power? HA! I had no power at all. Complete stall. The last time it all most killed me. We went through 3 fuel pumps.
The fix does reduce the HP of the engine. It was a very noticeable.
