Well aware of the difference, have found info here that both OE and OEM will last. The China made knock-offs fail.

FWIW, I went OE when the E-Bay special failed in under 6 mos, $110 from Ferman BMW on Hwy 19 in FLA.

__________________
'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!