Oxygen Sensor Replacement Estimate for Mercedes-Benz E420

Mercedes-Benz E420 Oxygen Sensor Replacement costs $240 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$182 to $268
Labor: $70 -$80
Parts: $112 -$188
Average Dealer price
$317 to 470
Average Shop price
$223 to 319
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CarServiceYourMechanic PriceShop/Dealer Price
1995 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$273.54Shop/Dealer Price$349.84 - $521.55
1997 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$232.18Shop/Dealer Price$298.26 - $439.05
1994 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$269.78Shop/Dealer Price$345.17 - $514.09
1997 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$188.63Shop/Dealer Price$243.78 - $351.87
1995 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$273.54Shop/Dealer Price$349.86 - $521.58
1994 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$273.54Shop/Dealer Price$349.83 - $521.54
Show example Mercedes-Benz E420 Oxygen Sensor Replacement prices

Parts required for a Mercedes-Benz E420 Oxygen Sensor Replacement

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Patrick
27 years of experience
This is my second experience with Patrick. He is an outstanding mechanic! He's knowable and efficient. I would strongly recommend him!!
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Alex
11 years of experience
He was very polite and knowledgeable of the work to be done. He kept me informed of the status of my parts.
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12 years of experience
Adam was on time and finished on time. One of the first mechanics in my life that I was completely impressed with.
2010 MERCEDES-BENZ CLS550 - CAR STARTER REPAIR
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Shaun
11 years of experience
Needed my front struts replaced. Shaun was originally unable to remove the springs from the strut due to the spring's high tension - he took the shocks back to his place where he had an air compressor and finished the job before I got out of work. All throughout this he remained intention about staying communicative - very professional! I'd say - a good job! Car's working fine now.
2012 MERCEDES-BENZ SLK350 - STRUT ASSEMBLY REPLACEMENT (FRONT)
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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