View Full Version : Are the pre-cat 02 sensors the same for 04MM and Grand Marquis?
04allstock
05-17-2016, 10:46 AM
The dealership says they're the same, but the mechanic says they're not.
babbage
05-17-2016, 11:07 AM
NGK/NTK is OEM, All 4 are the same O2 sensor. The front sensors are most important.
I think they are the same as MM
Fastbob
05-17-2016, 03:21 PM
According to www.tascaparts.com and www.rockauto.com
on both cars the sensors are the same. Part number 5C5Z-9F472-BA for the pre cat sensors $39.81 each for genuine Ford parts. The rear sensors are different than the front, but the same on both cars also.
vegasmarauder
05-17-2016, 08:24 PM
They are the same. Only front vs rear is different (connectors different). I have changed out 6 sets of O2 sensors on MM's and the Ford parts work great.
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