In Reply to: Alex you really don't need it, runs better without posted by Brett A. on January 31, 2001 at 16:34:49:
I wanted any opinions on using a Bosch O2 sensor from a late 80's Ford Mustang V8 for my 86 535i. Mustang's is $37 and the cheapest BMW $90.
I'm replacing the cat on the weekend.
While you "might" gain a somewhat smoother idle, the car will run too rich and your fuel economy will not be as good as it could be.
I have the number for the 3-wire Bosch part at the shop. The only difference between it and the OEm BMW part is the connector.
It's an easy clip and reconnect job.
Email me if you want me to email the part number back to you.