I have alot of experience working on the 325 engine, but I do not know much about the 323 or 328. I have a 525 with 180k that runs great and I am getting ready t buy a E90 for my son and wanted to know if the 323 or 328 have any issues different than the 325.

Garry
95 525i 180k
99 M3 Conv. - sold
01 540 sport 5 speed - sold
84 533 - sold
82 320 - sold95 525i
171k