Mercedes-Benz ML430 Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Mercedes-Benz ML430

Mercedes-Benz ML430 Oxygen Sensor Replacement costs $226 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$220 to $255
Labor: $70 -$80
Parts: $150 -$175
Average Dealer price
$393 to 442
Average Shop price
$271 to 302
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Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
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CarServiceYourMechanic PriceShop/Dealer Price
2001 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$370.04Shop/Dealer Price$470.46 - $714.55
2001 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$419.24Shop/Dealer Price$532.08 - $813.16
1999 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$375.72Shop/Dealer Price$477.60 - $725.98
2000 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$375.72Shop/Dealer Price$477.64 - $726.04
1999 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$375.72Shop/Dealer Price$477.58 - $725.94
2000 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$375.72Shop/Dealer Price$477.55 - $725.89
Show example Mercedes-Benz ML430 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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Excellent Rating


Mercedes-Benz ML430 Repair

Average Rating

5/5

Number of Reviews

154

Rating Summary
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Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Lucas

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Excellent work, very knowledge and experienced. He is fair and honest and only does the work that is needed.
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Joe

11 years of experience
118 reviews
Joe
11 years of experience
Very nice guy, did great work and spent time talking about my vehicle and explaining the other diagnosis. It was great to have our SUV fixed in our driveway first thing Saturday am. Having the option to supply your own parts is a HUGE plus. I'd highly recommend working with this mechanic. Dudes a straight shooter from the hip. Hard to find in the world of car repair.
2010 MERCEDES-BENZ ML350 - AIR PUMP - NASHVILLE, TN

Chris

12 years of experience
83 reviews
Chris
12 years of experience
Chris was punctual and was very thorough in the 50 point inspection as he listened well to my concerns. He did an excellent job explaining "codes." I was very comfortable and felt like I had an honest mechanic that I could trust. I highly recommend this affordable service in comparison to brick and mortar shops - coming to your home is the cherry on top!
2006 MERCEDES-BENZ R350 - OIL CHANGE - SAN DIEGO, CA
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
2001 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$370.04Shop/Dealer Price$470.46 - $714.55
2001 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$419.24Shop/Dealer Price$532.08 - $813.16
1999 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$375.72Shop/Dealer Price$477.60 - $725.98
2000 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$375.72Shop/Dealer Price$477.64 - $726.04
1999 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$375.72Shop/Dealer Price$477.58 - $725.94
2000 Mercedes-Benz ML430V8-4.3LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$375.72Shop/Dealer Price$477.55 - $725.89
Show example Mercedes-Benz ML430 Oxygen Sensor Replacement prices

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