Oxygen Sensor Replacement Estimate for BMW 840Ci

BMW 840Ci Oxygen Sensor Replacement costs $212 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$197 to $258
Labor: $70 -$88
Parts: $127 -$170
Average Dealer price
$347 to 442
Average Shop price
$242 to 304
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CarServiceYourMechanic PriceShop/Dealer Price
1996 BMW 840CiV8-4.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$253.65Shop/Dealer Price$324.97 - $481.77
1996 BMW 840CiV8-4.4LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$204.58Shop/Dealer Price$263.75 - $383.83
1997 BMW 840CiV8-4.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$250.25Shop/Dealer Price$320.77 - $475.05
1995 BMW 840CiV8-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$213.47Shop/Dealer Price$275.62 - $399.00
1995 BMW 840CiV8-4.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$216.04Shop/Dealer Price$278.77 - $404.03
1997 BMW 840CiV8-4.4LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$207.11Shop/Dealer Price$266.79 - $388.68
1994 BMW 840CiV8-4.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$216.68Shop/Dealer Price$279.72 - $405.57
1994 BMW 840CiV8-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$213.47Shop/Dealer Price$275.66 - $399.07
Show example BMW 840Ci Oxygen Sensor Replacement prices
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Parts required for a BMW 840Ci Oxygen Sensor Replacement

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Peter
38 years of experience
GREAT MECHANIC, WE WILL ALWAYS ASK FOR PETER A+A+A+
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Richard
16 years of experience
GOOD job will use richard for now on for repair work and service i was told this by my wife.
2003 BMW 525I - ENGINE MOUNT REPLACEMENT (SIDE)
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Robert
16 years of experience
Robert did a great job and was professional at the work and also did the fluid leak diagnosis and explained the diagnosis very well.
2008 BMW 335I - SPARK PLUG REPLACEMENT
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Luis
10 years of experience
Luis was very nice. He called and emailed me to let me know he was in route to the preown car inspection everything about the car was written out in his report. His report and recommendation was made as soon as he finished his reports with no delay . Good job Mr. Luis . Now I hope your auto check was on the money. Thanks
2011 BMW 528I - PRE-PURCHASE CAR INSPECTION
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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.

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