Oxygen Sensor Replacement Estimate for Mercedes-Benz 400E

Mercedes-Benz 400E Oxygen Sensor Replacement costs $254 on average. Following is a breakdown of the labor and parts estimates.

Skip the repair shop - our mechanics come to you
YourMechanic Price
$249 to $268
Labor: $70 -$80
Parts: $179 -$188
Average Dealer price
$451 to 470
Average Shop price
$307 to 319
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
1993 Mercedes-Benz 400EV8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$273.54Shop/Dealer Price$349.84 - $521.55
1993 Mercedes-Benz 400EV8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$269.78Shop/Dealer Price$345.25 - $514.23
1992 Mercedes-Benz 400EV8-4.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$259.83Shop/Dealer Price$332.74 - $494.21
1992 Mercedes-Benz 400EV8-4.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$259.83Shop/Dealer Price$332.78 - $494.27
Show example Mercedes-Benz 400E Oxygen Sensor Replacement prices

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

Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

586 reviews
Joshua
22 years of experience
It's rate to meet a gifted person who loves what s/he is doing. Joshua is one of those exceptional people. He's highly skilled but also enjoys what he's doing. He's also a very authentic, hard-working person with high integrity. My car and I feel very fortunate and grateful meeting Joshua.
1998 MERCEDES-BENZ C230 - CAR AC COMPRESSOR REPLACEMENT
Want Joshua's expert advice? Ask your question now. Its free!
282 reviews
Mark
6 years of experience
Excellent service, fast diagnosis, friendly and very nice!
1997 MERCEDES-BENZ E320 - CHECK ENGINE LIGHT IS ON INSPECTION
Want Mark's expert advice? Ask your question now. Its free!
124 reviews
Jerel
6 years of experience
Jerel was very punctual and professional and installed my heater motor blower within a timely fashion and was on his way.
2007 MERCEDES-BENZ S550 - CAR HEATER BLOWER MOTOR REPLACEMENT
Want Jerel's expert advice? Ask your question now. Its free!
50 reviews
Matthew
6 years of experience
quick & perfect!
2007 MERCEDES-BENZ CLK550 - RESET MAINTENANCE REMINDER SYSTEM
Want Matthew's expert advice? Ask your question now. Its free!

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