BMW 750iL Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a BMW 750iL Oxygen Sensor Replacement is $230 with $90 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1991 BMW 750iLV12-5.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$449.36Shop/Dealer Price$529.25 - $754.75
1990 BMW 750iLV12-5.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$465.95Shop/Dealer Price$549.15 - $791.53
2001 BMW 750iLV12-5.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$326.33Shop/Dealer Price$374.67 - $512.36
1997 BMW 750iLV12-5.4LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$326.33Shop/Dealer Price$374.67 - $512.36
1999 BMW 750iLV12-5.4LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$326.33Shop/Dealer Price$377.24 - $516.87
1996 BMW 750iLV12-5.4LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$326.33Shop/Dealer Price$374.91 - $512.79
2000 BMW 750iLV12-5.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$326.33Shop/Dealer Price$374.69 - $512.41
1998 BMW 750iLV12-5.4LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$326.33Shop/Dealer Price$374.67 - $512.36
Show example BMW 750iL Oxygen Sensor Replacement prices

What is the Oxygen Sensor all about?

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-MATROX-1

When replacing the oxygen sensor remember:

  • Many oxygen sensors are damaged by leaking oil or coolant. If that is the case, the cause of that leak needs to be identified and repaired, or else the replacement oxygen sensor will be damaged as well.
  • New vehicles require specific oxygen sensors, and not the universal sensors that were common prior to 1996.

How it's done:

  • Scan the computer in the car for codes.
  • Inspect for vacuum leaks and holes in the exhaust system.
  • Remove and replace the oxygen sensor if it is bad.
  • Check electrical connections.
  • Check for proper operation of oxygen sensors.
  • Clear diagnostic codes.
  • Test drive car.

Our recommendation:

Keep up with the tune-ups. If check engine light is on, don't drive the car too long without getting it inspected. If check engine light is flashing, pull over and get the car towed to avoid costly repairs. Ask the mechanic to inspect the vacuum hoses and leaks in the exhaust system. If the vacuum hose or exhaust system is leaking, it will display an oxygen sensor fault code. Replacing an oxygen sensor may not fix the problem.

What common symptoms indicate you may need to replace the Oxygen Sensor?

  • Check Engine light is on.
  • Car is getting poor gas mileage.
  • Emission test fails.

How important is replacing the oxygen sensor?

Your vehicle has multiple oxygen sensors, and they all help the car run optimally. The front sensors measure how much oxygen is in the exhaust stream to measure how rich or lean the gases leaving the gas chamber are. The rear sensors measure the oxygen content of the gases as they leave the catalytic converter. The oxygen sensors then relay this information to your vehicle’s electronic control unit, so that it can adjust as necessary. Because cars depend on an ideal fuel-to-air ratio to function optimally, the oxygen sensors are leaned on for engine performance. When your oxygen sensors fail your car will run less smoothly, get worse mileage, and have worse emissions.

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Excellent Rating

(11)

Rating Summary
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Dayan

18 years of experience
23 reviews
Dayan
18 years of experience
BMW 750iL V12-5.0L - Battery - Miami, Florida
Daysn is an excellent mechanic. He doesnt give up until the job is done no matter how difficult. I recommend him to anyone.

Jose

16 years of experience
249 reviews
Jose
16 years of experience
BMW 750iL V12-5.4L - Coolant is leaking - Clearwater, Florida
He did a great job

Craig

17 years of experience
67 reviews
Craig
17 years of experience
BMW 750iL V12-5.4L - Alternator - San Jose, California
I was,am completely satisfied from the first phone call to the end product(my car fixed right)!!

Adam

17 years of experience
64 reviews
Adam
17 years of experience
BMW 750iL V12-5.0L - Serpentine/Drive Belt - Plano, Texas
I highly recommend Adam to anyone needing work to their car or truck. I own 2 old BMW 750iL 12 cylinder sedans. I'm talking 25 and 28 years old. They both have been in storage for about 6 years. One of them had a broken fan belt which I called Mobile Mechanic to send some one to replace it. The person they sent was Adam. Adam was on time for our appointment. He called the day before to introduce himself and disgusted with me the work to be done. Upon his arrival the day of our appointment, he was very polite when he introduced himself to me. He then went to examine my car and what needed to be done in my presents. After his examination he informed me that my water pump may had seized up and it was what was causing the belt to break. He suggested there also may be other things wrong such as the fan clutch that is attached to the water pump may also be froze up. He suggested that I not put the belt on but take it to a garage for further examination. We agree to this and he left without charging me anything. What an honest guy. I did take his advise and the next day had the car at the garage and they found that Adam was right. Both fan clutch and water pump froze up and that is what caused the belt to break. Adam not only saved me the cost of replacing another fan belt which would have broken if he replaced it but also the possibility of getting stuck on the road when the new belt would have broken because of the other 2 problems. Adam was honest enough to inform me of the possible additional problems even at the cost of him not getting the original job he was sent to do. When I get the other car out of storage it is my intent to call Adam to check it out and let me know what needs to be done.

Excellent Rating

(11)

Rating Summary
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Number of BMW 750iL services completed
121+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
experts on our platform

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