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
1994 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$273.54Shop/Dealer Price$349.84 - $521.55
1994 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$269.78Shop/Dealer Price$345.25 - $514.23
1995 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$269.78Shop/Dealer Price$345.17 - $514.09
1997 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$232.18Shop/Dealer Price$298.22 - $438.97
1995 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$273.54Shop/Dealer Price$349.86 - $521.58
1997 Mercedes-Benz E420V8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$190.87Shop/Dealer Price$246.48 - $356.19
Show example Mercedes-Benz E420 Oxygen Sensor Replacement prices

Parts required for a Mercedes-Benz E420 Oxygen Sensor Replacement

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282 reviews
Mark
6 years of experience
He is a great mechanic he knows a lot he does his research and is through with whatever he is doing.
2004 MERCEDES-BENZ E500 - OIL CHANGE
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277 reviews
Trung
7 years of experience
Trung called and arrived a bit earlier which I told him he could do that since I'm already back in my location. He took care of it like a pro and fast. I found out he has to drive from quite a distance away to my location which make me feel bad. My Mercedes warning light was all reset after the oil change and everything is back to normal. Found a minor leak in trans axle. Awesome job Trung. Keep up the good work.
2005 MERCEDES-BENZ CLK500 - OIL CHANGE
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197 reviews
Jeff
22 years of experience
Jeff changed my oil pretty quickly even though my Mercedes is a bit of a hassle to deal with. Additionally, he helped me figure out that the reason my car wasn't changing gears is most likely because it does not have enough transmission fluid. On top of that, he was very friendly and provided me with awesome customer service- and now I know exactly what I need to get services to get my car back in action!
2003 MERCEDES-BENZ C230 - OIL CHANGE
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164 reviews
Theodore
11 years of experience
Great service! Theodore was very knowledgeable and thorough in his assessment of my car. I appreciate his help.
1976 MERCEDES-BENZ 280C - CAR BATTERY TERMINAL ENDS REPLACEMENT
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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