Oxygen Sensor Replacement Estimate for BMW 735iL

BMW 735iL Oxygen Sensor Replacement costs $228 on average. Following is a breakdown of the labor and parts estimates.

Skip the repair shop - our mechanics come to you
YourMechanic Price
$227 to $237
Labor: $70 -$80
Parts: $157
Average Dealer price
$408
Average Shop price
$280
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
1990 BMW 735iLL6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$239.97Shop/Dealer Price$307.87 - $454.40
1991 BMW 735iLL6-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$236.82Shop/Dealer Price$304.06 - $448.32
1991 BMW 735iLL6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$236.82Shop/Dealer Price$303.98 - $448.18
1992 BMW 735iLL6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$236.82Shop/Dealer Price$304.01 - $448.25
1989 BMW 735iLL6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$239.97Shop/Dealer Price$307.89 - $454.43
1990 BMW 735iLL6-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$239.97Shop/Dealer Price$307.86 - $454.38
1992 BMW 735iLL6-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$240.75Shop/Dealer Price$309.00 - $456.24
1989 BMW 735iLL6-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$236.82Shop/Dealer Price$304.05 - $448.31
Show example BMW 735iL Oxygen Sensor Replacement prices
i
Have a car question? Get free advice from our top-rated mechanics.

Parts required for a BMW 735iL Oxygen Sensor Replacement

Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

586 reviews
Joshua
22 years of experience
Joshua is always the best person to work on my car and like his wisdom very true and people person. Joshua you are the best person and mechanic I ever encountered with thanks a lot for you service.
2006 BMW 325I - CAR IS MAKING A NOISE INSPECTION
Want Joshua's expert advice? Ask your question now. Its free!
331 reviews
Jamahl
15 years of experience
Fast and professionnal
2005 BMW 325I - BATTERY REPLACEMENT
Want Jamahl's expert advice? Ask your question now. Its free!
283 reviews
Patrick
27 years of experience
Patrick is a great guy and really knows his stuff. Yourmechanic.com rips you a new one on parts and labor but i guess you pay for not having the headache. I paid 370 labor for 3 hours and 255 for parts that go for 65 bucks on parksgeek.com and even cheaper on a few other sites but for original bmw parts it is 65 and they charged 255. Fyi. If it can wait a couple days, buy the parts first
2005 BMW 645CI - CAMSHAFT POSITION SENSOR REPLACEMENT
Want Patrick's expert advice? Ask your question now. Its free!
87 reviews
Chris
21 years of experience
Did an excellent job and was professional. Ended up paying about half my quoted price!
2007 BMW 530I - OIL CHANGE
Want Chris'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