M50 Oil Level Switch
Hello. I know I've asked this before, but still looking for an answer to my problem.
Question: Is there a difference between the 1992 525i (M50) and 1995 520i (M50)oil level switches?
I've been looking all over online, and so far as I can tell, this was a common part on the M50 engine for several years. What I can't seem to find out is whether there was a difference in the part between the two model years. The part in my 95 car doesn't seem to have the metal wire guard on it, or the wire that extends from the part. Yet, the dash shows that the oil level is consistently at one quart and that the engine requires service. I have a good working switch from my old 1992 car which has the wire protector and the wire on it (as shown in the pic below). Problem is, there doesn't seem to be a connector in the engine wiring to connect it to. The realoem diagram shows one switch, part number 12611748193, but two different mounting plates. One of them has the wire guard, the other (Cover lid/#10) has nothing but the O-ring. #10 has a part number shown in the part number legend, the other (the metal guard piece) does not, indicating that it's used or shown on another diagram. I've looked at several different diagrams and can't locate which other applications this plate is used.
So, is there a difference in the way that these switches were wired between the two model years? If my 95 switch is missing something and is not plugged in, why does the dash display read anything at all? Does the 520 use a slightly different switch than the 525 (like from a 3 series? The 518 doesn't seem to use this switch at all.)? If the switch in my car isn't supposed to have the wire coming up the side of the pan, where DOES it plug in?
Sorry, but, this has me baffled.
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