Oxygen Sensor Replacement Estimate for BMW 740i

BMW 740i Oxygen Sensor Replacement costs $256 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 $544
Labor: $70 -$280
Parts: $108 -$264
Average Dealer price
$309 to 854
Average Shop price
$219 to 622
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
2001 BMW 740iV8-4.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$253.65Shop/Dealer Price$324.97 - $481.77
2012 BMW 740iL6-3.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$397.76Shop/Dealer Price$525.31 - $706.90
1999 BMW 740iV8-4.4LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$204.58Shop/Dealer Price$263.67 - $383.70
1995 BMW 740iV8-4.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$209.39Shop/Dealer Price$270.53 - $390.85
1998 BMW 740iV8-4.4LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$207.11Shop/Dealer Price$266.82 - $388.73
1998 BMW 740iV8-4.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$253.65Shop/Dealer Price$324.97 - $481.75
1997 BMW 740iV8-4.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$254.50Shop/Dealer Price$326.19 - $483.73
1994 BMW 740iV8-4.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$191.78Shop/Dealer Price$248.55 - $355.69
Show example BMW 740i Oxygen Sensor Replacement prices
i
Have a car question? Get free advice from our top-rated mechanics.

Parts required for a BMW 740i Oxygen Sensor Replacement

Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

192 reviews
Chet
36 years of experience
came on time, friendly and made the repairs in a expected time. happy with service.
2008 BMW 328I - WINDSHIELD WASHER PUMP REPLACEMENT (FRONT)
Want Chet's expert advice? Ask your question now. Its free!
119 reviews
Adam
12 years of experience
Exceeded all expectations. First class young man. I will do business in the future and request him as the mechanic for any future business.
2003 BMW 325I - WATER PUMP REPLACEMENT
Want Adam's expert advice? Ask your question now. Its free!
77 reviews
Richard
6 years of experience
Great guy. Very competent and honest. He will be my mechanic for now on.
2007 BMW 328I - OIL/FLUID LEAK INSPECTION
Want Richard's expert advice? Ask your question now. Its free!
14 reviews
Carlos
11 years of experience
Carols was helpful, honest and pleasure to work with. He gave me a hint of what to do with my car from this point because it does need some work. I was happy because he gave me a couple pointers on how to get my car fixed with paying a lot for it.
2004 BMW 325CI - OIL CHANGE
Want Carlos'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