Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Mercedes-Benz R500

Mercedes-Benz R500 Oxygen Sensor Replacement costs $223 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$177 to $286
Labor: $70 -$144
Parts: $107 -$142
Average Dealer price
$307 to 451
Average Shop price
$217 to 327
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
2006 Mercedes-Benz R500V8-5.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$223.03Shop/Dealer Price$286.69 - $420.52
2007 Mercedes-Benz R500V8-5.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$220.20Shop/Dealer Price$283.27 - $415.07
2006 Mercedes-Benz R500V8-5.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$239.51Shop/Dealer Price$313.70 - $433.19
2007 Mercedes-Benz R500V8-5.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$239.51Shop/Dealer Price$313.76 - $433.30
Show example Mercedes-Benz R500 Oxygen Sensor Replacement prices

Oxygen Sensor Replacement Service & Cost

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

Keep in mind:

  • 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 this service?

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.

Fast and easy Oxygen Sensor Replacement service at your home or office.

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Real customer reviews from Mercedes-Benz owners like you.

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Chris
17 years of experience
5 stars are not enough to rate Chris. He arrived on time, extremely knowledgeable, patient with my curiosity, polite answering all my questions, thorough and detailed in his work and, overall, impressive. I've been to endless auto shops and mechanics which either resulted in temporary or partial satisfaction, or even disappointment. This was my experience today with Yourmechanic.com, and, in particular, with Chris Allshouse: I made an appointment for half dozen (or so) misc inspection services for $200 to find out any and all possible issues that needed to be fixed - which Chris pointed out and explained (to a person who knows basically nothing about cars) in layman's terms. He first mentioned I needed new battery and some random fuses/etc as well as tune-up in near future (after I put some more miles on car). Of course my first worry and response was how much more will this cost me, but was delightfully surprised and immediately told not to worry because when I (a customer) pays for "inspection" service appointment, that money is credited toward any future repairs/work done on my car - LOVED IT! I only had to pay few dollars more to get some work done, new battery with install, fuses and more!! As for the tune-up, Chris explained each little thing needed in regards to the tune-up rather than just telling me I need a "tune-up" which could mean I needed a bunch of things done (that are most likely not even necessary). To sum up my review, and end my rambling, I randomly stumbled upon Yourmechanic.com a long time ago. I think It took me two years, maybe even more, to finally drop my skepticism and make an appointment with Yourmechanic.com, yet, because of Chris Allshouse, it took less than a minute to feel confident and excited to set up follow up appointment (as well as request to service my other car). Chris was very personable and easy to talk to. He was very informative and took the time to explain everything to me. I highly recommend him. For the first time, the results were different and with only one afterthought…What took me so long to make this decision!
2004 MERCEDES-BENZ CLK500 - BRAKES, STEERING AND SUSPENSION INSPECTION
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111 reviews
Christopher
22 years of experience
Awesome experience!! Chris was great!! I was extremely satisfied with his service. I would recommend him to family and friends. Besides delivering a new battery and installing it, He checked all the fluid levels, checked the tire pressure and made sure all the the malfunction lights went away. He was very professional, knowledgable and friendly.The final bill was less than I was quoted, because he gave me a $20.00 discount.I asked for his card so that I could request him if I need YourMechanic services again. Love this company!!!
2002 MERCEDES-BENZ CLK320 - CAR BATTERY REPLACEMENT
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39 reviews
Jay
11 years of experience
Jays is such a gentlemen, I am very happy and please with his service. I will definitely book him again. Thank you
2012 MERCEDES-BENZ C300 - UBERX INSPECTION AND OIL CHANGE PACKAGE
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30 reviews
Terrell
36 years of experience
Super quick and easy, was in and out. Will def use again.
2011 MERCEDES-BENZ C300 - BRAKE LIGHT BULB REPLACEMENT (DRIVER SIDE)
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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
2006 Mercedes-Benz R500V8-5.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$223.03Shop/Dealer Price$286.69 - $420.52
2007 Mercedes-Benz R500V8-5.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$220.20Shop/Dealer Price$283.27 - $415.07
2006 Mercedes-Benz R500V8-5.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$239.51Shop/Dealer Price$313.70 - $433.19
2007 Mercedes-Benz R500V8-5.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$239.51Shop/Dealer Price$313.76 - $433.30
Show example Mercedes-Benz R500 Oxygen Sensor Replacement prices

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