Oilslickwillie

Hi there, I have a X3 E83 3.0ltr D sport Auto 216bhp, 160kw on a 05 plate, can anyone help with my shock absorber question, which is why is there so many different OEM numbers on the shocks, what’s the difference between them all, are they compatible between different specs & engine type of X3, & how come my shocks on my car at the moment are the same OEM number which if fitted to the 2.0 petrol version???