Oxygen Sensor Replacement Estimate for Mercedes-Benz 400SEL

Mercedes-Benz 400SEL Oxygen Sensor Replacement costs $259 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$258 to $268
Labor: $70 -$80
Parts: $188
Average Dealer price
$470
Average Shop price
$319
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CarServiceYourMechanic PriceShop/Dealer Price
1993 Mercedes-Benz 400SELV8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$273.54Shop/Dealer Price$349.84 - $521.55
1993 Mercedes-Benz 400SELV8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$269.78Shop/Dealer Price$345.25 - $514.23
Show example Mercedes-Benz 400SEL Oxygen Sensor Replacement prices

Parts required for a Mercedes-Benz 400SEL Oxygen Sensor Replacement

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Tien
18 years of experience
Tienwas friendly he was accurate he explained everything to me and with his experience and his professionalism coupled with his pleasant demeanor, I do not prefer that anyone else works on my vehicle. Tien is my mechanic with your mechanic thank you very much have a great day. By the way I been telling all my friends about Yur Mechanic.
1999 MERCEDES-BENZ C230 - WIPERS ARE NOT WORKING INSPECTION
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19 years of experience
Awesome Service ; Super Friendly :)
2011 MERCEDES-BENZ SLS AMG - CAR IS NOT STARTING INSPECTION
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Rodney
31 years of experience
This was my first time using a at home service for my car , after reading the comments from other customers I decided to give it a try , and oh my gosh I was totally shocked by the professionalism that Rodney provided he showed up early which I was fine with cause I am a tickler for being on time and on time he was , so that was a big check mark , professionally dressed with company logo uniform . Not only did he find out the problem with my car but also did a inspection of the entire car , let me know that my tires were low and recommended that as soon as i get it running go and get them inflated and told me what pressure for front and the rear . So yes I was very happy with Rodney and the service he provided and the overall attention of the company putting customers first . Looking forward to seeing Rodney next week for the repairs .
2005 MERCEDES-BENZ ML350 - CHECK ENGINE LIGHT IS ON INSPECTION
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Brikk
13 years of experience
Excellent service
2002 MERCEDES-BENZ C230 - CHECK ENGINE LIGHT IS ON INSPECTION
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All about Oxygen Sensor Replacement

With each new model year, manufacturers are adding more oxygen sensors to better manage engine operation. Some high performance engines have an oxygen sensor for each cylinder as well as one for the rear of each catalytic convertor. The sensors are located either underneath the hood or underneath the car. The oxygen sensors are connected (screwed) to the exhaust pipe, either in front or back of the catalytic converter. The front (upstream) sensors measure the amount of oxygen in the exhaust system. The purpose of the front oxygen sensor(s) is to measure how rich or lean the gases are as the gases exit the combustion chamber. Depending upon whether the exhaust gas is lean (high in oxygen content) or rich (low in oxygen content), the amount of fuel entering the engine is adjusted by the engine management computer to try and maintain an ideal mixture that produces the lowest emissions output from the catalytic convertor. Rear (downstream) sensors are located behind the catalytic converter. The purpose of the rear oxygen sensor(s) is to monitor the oxygen content of the exhaust gases leaving the catalytic convertor. If one or more of the oxygen sensors are faulty, your car may not pass the emissions test. If you drive your car with a faulty oxygen sensor, you may get poor gas mileage and it can damage the catalytic converter.

Oxygen Sensor Replacement Estimates for Popular Mercedes-Benz Models