Oxygen Sensor Replacement Estimate for BMW 735i

BMW 735i Oxygen Sensor Replacement costs $216 on average. Following is a breakdown of the labor and parts estimates.

Skip the repair shop - our mechanics come to you
YourMechanic Price
$157 to $237
Labor: $70 -$80
Parts: $87 -$157
Average Dealer price
$268 to 408
Average Shop price
$192 to 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
1988 BMW 735iL6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$239.97Shop/Dealer Price$307.87 - $454.40
1991 BMW 735iL6-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$236.82Shop/Dealer Price$304.06 - $448.32
1992 BMW 735iL6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$236.82Shop/Dealer Price$303.98 - $448.18
1987 BMW 735iL6-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$162.60Shop/Dealer Price$211.24 - $299.81
1991 BMW 735iL6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$239.97Shop/Dealer Price$307.89 - $454.43
1989 BMW 735iL6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$239.97Shop/Dealer Price$307.86 - $454.38
1988 BMW 735iL6-3.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$240.75Shop/Dealer Price$309.00 - $456.24
1990 BMW 735iL6-3.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$236.82Shop/Dealer Price$304.05 - $448.31
Show example BMW 735i Oxygen Sensor Replacement prices
i
Have a car question? Get free advice from our top-rated mechanics.

Parts required for a BMW 735i Oxygen Sensor Replacement

Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

287 reviews
Steven
9 years of experience
Steven was very prompt and professional. He kept me up to date prior to arrival on his timing and whereabouts. Upon arrival, there were some delays in getting the vehicle ready for inspection, however, Steven was very patient courteous. His background of repairing vehicles and his history with welding made me confident that he knew what he was looking for in a rebuilt salvage title vehicle. I hired him through YouMechanic for a pre-purchase inspection. I highly recommend him and will definitely use him for future services.
2004 BMW M3 - PRE-PURCHASE CAR INSPECTION
Want Steven's expert advice? Ask your question now. Its free!
277 reviews
Trung
7 years of experience
Outstanding service from Trung. Very friendly, completed the service on time and explained everything. Will definitely use it again.
2011 BMW 135I - OIL CHANGE
Want Trung's expert advice? Ask your question now. Its free!
87 reviews
Manuel
27 years of experience
This mechanic immediately made me feel like I was in good hands!
1995 BMW 525I - OIL CHANGE
Want Manuel's expert advice? Ask your question now. Its free!
25 reviews
Jose
10 years of experience
My car was running rough and shaking when idle, so I booked an appointment for an inspection. My mechanic was Jose Guzman. He did an inspection, and he found the car has eccentric shaft sensor and camshaft Position Sensor problems in just less than 10 minutes. I was impressed by his knowledge and experience about cars. He did a great job today.
2008 BMW 328I - CHECK ENGINE LIGHT IS ON INSPECTION
Want Jose'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