I doubt it. Usually the harnesses are for Hyundai and similar. Unless you are 'good' its a trip to a radio installer. BTW the three worst people to follow into a dash are 1) Radio installers 2) Alarm and Imobiliser installers and 3) Plumbers. Hope you know a good one.
Good - Fast - Cheap: Pick any two.
E23 735i; E32 735iL; E34 535i; 2 X E38 735iL (Oxford Green and Alpine White); R50 Cooper; R55 Cooper Clubman.
E21 318i; E30 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
I've just changed my wiper blades and now my reverse lights don't work. Should I change my fuel pump relay?