can anyone tell me,on windshield side of car is 3 Relay's can anyone tell me what relay separately doing,I know that in the middle is something about fuel pump.
thanks
Q:BMW 318Is 1990 relay question
Jul 02, 2005
4 Replies
My 1990 318iS only has two there I think. Fuel pump and Motronic relays.
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The third relay is for the O2 sensor heater. If your car is not so equipped, it will be empty.
Kyle.
98 740iL 97 M3
That explains why I have only two. A cat was optional on late model E30s, but I've never seen one actually fitted.
3rd should be the O2 sensor heater
-Fred W
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