Oxygen Sensor Replacement Estimate for Mercedes-Benz E420

Mercedes-Benz E420 Oxygen Sensor Replacement costs $236 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$183 to $263
Labor: $70 -$80
Parts: $113 -$183
Average Dealer price
$319 to 459
Average Shop price
$225 to 312
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CarServiceYourMechanic PriceShop/Dealer Price
1994 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$267.68Shop/Dealer Price$342.51 - $509.83
1994 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$264.03Shop/Dealer Price$338.06 - $502.73
1995 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$264.03Shop/Dealer Price$337.98 - $502.59
1997 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$229.40Shop/Dealer Price$294.74 - $433.41
1997 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$192.20Shop/Dealer Price$248.17 - $358.89
1995 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$267.68Shop/Dealer Price$342.50 - $509.82
Show example Mercedes-Benz E420 Oxygen Sensor Replacement prices
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Parts required for a Mercedes-Benz E420 Oxygen Sensor Replacement

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Awesome experience!! Chris was great!! I was extremely satisfied with his service. I would recommend him to family and friends. Besides delivering a new battery and installing it, He checked all the fluid levels, checked the tire pressure and made sure all the the malfunction lights went away. He was very professional, knowledgable and friendly.The final bill was less than I was quoted, because he gave me a $20.00 discount.I asked for his card so that I could request him if I need YourMechanic services again. Love this company!!!
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27 years of experience
great idea, great process, you are fine you have a great service
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21 years of experience
Thanks Chris. For the vehicle inspection and status report regarding the Mercedes Benz .I'm very impressed. Thank you.
1987 MERCEDES-BENZ 190E - CAR IS OVERHEATING 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