Oxygen Sensor Replacement Estimate for Mercedes-Benz 300SEL

Mercedes-Benz 300SEL Oxygen Sensor Replacement costs $234 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$228 to $249
Labor: $70 -$80
Parts: $158 -$169
Average Dealer price
$410 to 431
Average Shop price
$281 to 294
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CarServiceYourMechanic PriceShop/Dealer Price
1991 Mercedes-Benz 300SELL6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$241.31Shop/Dealer Price$309.54 - $457.08
1988 Mercedes-Benz 300SELL6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$249.22Shop/Dealer Price$319.56 - $473.13
1989 Mercedes-Benz 300SELL6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$249.22Shop/Dealer Price$319.48 - $472.99
1989 Mercedes-Benz 300SELL6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$249.22Shop/Dealer Price$319.52 - $473.05
1991 Mercedes-Benz 300SELL6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$241.31Shop/Dealer Price$309.56 - $457.11
1990 Mercedes-Benz 300SELL6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$241.31Shop/Dealer Price$309.53 - $457.06
1990 Mercedes-Benz 300SELL6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$242.10Shop/Dealer Price$310.68 - $458.93
1988 Mercedes-Benz 300SELL6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$249.22Shop/Dealer Price$319.55 - $473.12
Show example Mercedes-Benz 300SEL Oxygen Sensor Replacement prices

Parts required for a Mercedes-Benz 300SEL Oxygen Sensor Replacement

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432 reviews
Patrick
22 years of experience
Patrick was great ( he showed up early which was appreciated!), however the part was not. Trying to get a replacement from him. The fan motor he replaced is not OEM quality. I will update this review when the job is done right...
2002 MERCEDES-BENZ CLK430 - CAR HEATER BLOWER MOTOR REPLACEMENT
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344 reviews
Robert
26 years of experience
Robert was extremely helpful in my buying decision on a used car. His report was excellent and time he took to review the results with me was much appreciated.
2005 MERCEDES-BENZ E500 - PRE-PURCHASE CAR INSPECTION
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308 reviews
Dan
34 years of experience
Second time - Great work again.
2005 MERCEDES-BENZ SLK350 - SHOCK ABSORBER REPLACEMENT (REAR)
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124 reviews
Jerel
6 years of experience
He was great, very professional
2004 MERCEDES-BENZ ML350 - VALVE COVER GASKET 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