Originally Posted by
billschusteriv
Short history: I bought a OEM waterpump for my E30 that crapped out on me after 10k miles. I opted to buy the OE one so I could return it to the stealer should it fail.
Some parts it matters... some it doesn't. It would probably help if we collectively share stories like that or have a list of parts that we recommend each other buy OE or from a certain vendor.
On the other hand, Marcus had the OE high pressure fuel pump (HPFP) on the E9x when it failed... only to have it fail again... and again...