Oxygen Sensor Replacement Estimate for BMW 740iL

BMW 740iL Oxygen Sensor Replacement costs $214 on average. Following is a breakdown of the labor and parts estimates.

Skip the repair shop - our mechanics come to you
YourMechanic Price
$178 to $268
Labor: $70 -$88
Parts: $108 -$180
Average Dealer price
$308 to 463
Average Shop price
$218 to 317
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
1995 BMW 740iLV8-4.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$211.89Shop/Dealer Price$273.56 - $395.69
2001 BMW 740iLV8-4.4LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$205.45Shop/Dealer Price$264.84 - $385.57
1994 BMW 740iLV8-4.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$191.11Shop/Dealer Price$247.64 - $354.22
1994 BMW 740iLV8-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$191.11Shop/Dealer Price$247.68 - $354.29
1993 BMW 740iLV8-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$186.26Shop/Dealer Price$240.76 - $347.02
1996 BMW 740iLV8-4.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$264.87Shop/Dealer Price$338.99 - $504.20
1995 BMW 740iLV8-4.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$250.39Shop/Dealer Price$321.86 - $472.99
2000 BMW 740iLV8-4.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$261.27Shop/Dealer Price$334.61 - $497.20
Show example BMW 740iL Oxygen Sensor Replacement prices

Parts required for a BMW 740iL Oxygen Sensor Replacement

Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

266 reviews
Grzegorz
36 years of experience
Grzegorz was fantastic—professional, knowledgeable, and helpful. He helped me figure out what I actually needed and saved me a lot of money.
1999 BMW 740IL - CHECK ENGINE LIGHT IS ON INSPECTION
Want Grzegorz's expert advice? Ask your question now. Its free!
111 reviews
Christopher
22 years of experience
The service and convenience of YourMechanic is great and Chris is AWESOME! Very courteous and thorough and great communication!
1997 BMW 528I - OIL CHANGE
Want Christopher's expert advice? Ask your question now. Its free!
105 reviews
Alfredo
16 years of experience
He was very professional, took time and detail on inspection and starter replacement reports were send accordingly. would recommend and book in the future.
2005 BMW 325CI - CAR STARTER REPAIR
Want Alfredo's expert advice? Ask your question now. Its free!
19 reviews
Alexis
25 years of experience
amazing service professional and well done.
2005 BMW 545I - BRAKE SYSTEM FLUSH
Want Alexis'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 BMW Models