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BMW Repair/BMW oxygen sensor
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Question
Hi, MY BMW 328i ,E36, 1998, has Oxygen sensor(4wires) it comes out with 4 colors RED,WHITE,YELLOW and BLACK, I'd like to know which ones are heaters,ground ant Signal.
Thank you for your time!
Lorik, the wiring diagram show power for the heater circuit being Red w/white tracer stripe. Ground for the heater is brown wire. The signal wires show Yellow and Black. The yellow wire should be power for the signal and the black wire the actual modified signal into the DME. Not sure on that the way the 6 cyl. diagram is layed out. The 4 cyl diagram is this way clearly. Don't imagine they would reverse their wiring for the 6 cyl. Your colors don't match up. I don't know why, maybe an aftermarket O2 sensor? Anyway, let your voltmeter be your guide.
-Evan
Related Articles
Evan Slater
Expertise
All 1999 model year and newer. Don't know much about pre OBD2 stuff. E46 and newer I am Especially good with late models. I NEED YEAR & MODEL OF VEHICLE! when asking questions. Please give last seven digits of the VIN number. Please give as much background info as possible when asking questions. Please read past questions and answers to avoid duplicate questions.
Experience
6 years automotive experience and 3+ years working as a Dealership Master Technician. Will offer dealership Technician perspective with knowledge of common failures/problems, part weaknesses, Service Bulletins, and Improved components. Will not give tipical Dealer Bull
Organizations
Current BMW dealership Master Technician
Education/Credentials
Graduate UTI Phoenix 2002 (won 9 out of 15 possible top student awards) BMW STEP Graduate 2004, Over 90% average on BMW ACT competition question for 3 years. BMW Master Technician Level 4 with Master Tech training. ASE Master Certified Technician.
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