I replaced the OPG on my E46 wagon at 110k. Had to drop the front subframe and disconnect the steering rack for the pan to clear for removal. It was an all day job, hoping not to do that one ever again.

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09/1996 M3 Alpine/Modena manual sedan (1 of 26)
05/1998 M3 Estoril/Grey automatic sedan (1 of 185)
09/2011 X5 35i Alpine/Schwarz Premium