Oxygen Sensor Replacement Estimate for BMW 740iL

BMW 740iL Oxygen Sensor Replacement costs $209 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$178 to $258
Labor: $70 -$88
Parts: $108 -$170
Average Dealer price
$309 to 442
Average Shop price
$219 to 304
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CarServiceYourMechanic PriceShop/Dealer Price
1993 BMW 740iLV8-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$186.94Shop/Dealer Price$241.59 - $348.35
1999 BMW 740iLV8-4.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$250.25Shop/Dealer Price$320.85 - $475.18
1995 BMW 740iLV8-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$213.47Shop/Dealer Price$275.58 - $398.93
1998 BMW 740iLV8-4.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$250.25Shop/Dealer Price$320.81 - $475.11
2001 BMW 740iLV8-4.4LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$207.11Shop/Dealer Price$266.82 - $388.73
2001 BMW 740iLV8-4.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$253.65Shop/Dealer Price$324.97 - $481.75
1994 BMW 740iLV8-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$194.48Shop/Dealer Price$251.97 - $361.17
1996 BMW 740iLV8-4.4LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$204.58Shop/Dealer Price$263.75 - $383.82
Show example BMW 740iL Oxygen Sensor Replacement prices
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Parts required for a BMW 740iL Oxygen Sensor Replacement

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445 reviews
Chris
17 years of experience
Chris knows what's he doing. He's very professional, couteous and friendly. He goes above and beyond the job in the appointment by doing additional inspection to find the root cause of my car's problem.
2002 BMW Z3 - CAMSHAFT POSITION SENSOR REPLACEMENT
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266 reviews
Grzegorz
36 years of experience
Hi, I am very happy that Grzegorz came over to fix my car. He is excellent and I do recommend him. I was just impressed how quickly he knew which issues needed to be resolved to get my car up and running. He is the Best! Adelard San Francisco, CA
1993 BMW 740IL - BATTERY REPLACEMENT
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129 reviews
Allen
31 years of experience
this is the best mechanic i have ever had!!
1995 BMW 325I - VALVE COVER GASKET REPLACEMENT
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61 reviews
Chad
11 years of experience
Chad was excellent. This guy knows what he's doing. I was relieved to know that he's comfortable working on BMWs and knows what he's talking about. Willing to go the extra mile. I'll definitely be requesting Chad next time.
2008 BMW 335XI - OIL FILTER HOUSING 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.

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