Where are the O2 sensors located on a 2003 Mercury Marauder

Asked by Hal1528 Nov 30, 2020 at 08:31 PM about the 2003 Mercury Marauder 4 Dr STD Sedan

Question type: Maintenance & Repair

I suspect that a faulty O2 sensor is causing variations in gas mileage.

2 Answers

157,475

They are in the exhaust one one both sides before (up stream) the catalytic converts and 2 after the converters (down stream). I own a low mileage 2004 Marauder. Great cars.

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157,475

**^^one on both sides...Total of 4.

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