Oxygen Sensor Replacement Estimate for Mercedes-Benz 400SE

Mercedes-Benz 400SE 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
1992 Mercedes-Benz 400SEV8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$273.54Shop/Dealer Price$349.84 - $521.55
1992 Mercedes-Benz 400SEV8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$269.78Shop/Dealer Price$345.25 - $514.23
Show example Mercedes-Benz 400SE Oxygen Sensor Replacement prices

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

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Brandon
13 years of experience
Brandon has performed 2 service calls at our home. After the first visit, my husband, whose such a skeptic, was sold. Needless to say, we plan to continue to use this service and request Brandon.
2005 MERCEDES-BENZ SLK350 - BRAKE SYSTEM FLUSH
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22 years of experience
Really friendly and so helpful! Got the job done right and fast!
1998 MERCEDES-BENZ ML320 - OIL CHANGE
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Chris
21 years of experience
Perfect!
2001 MERCEDES-BENZ E320 - WINDOW MOTOR / REGULATOR ASSEMBLY REPLACEMENT (PASSENGER SIDE REAR)
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First time booking Peter for an oil change. Provides excellent service and detailed inspection of service. Provided clean oil change at my office and recommend future service options. Will be using him again. Highly recommended!
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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