Mercedes-Benz G550 Oxygen Sensor Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(7)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(7)

Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a Mercedes-Benz G550 Oxygen Sensor Replacement is $384 with $289 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2014 Mercedes-Benz G550V8-5.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$2164.39Shop/Dealer Price$2694.24 - $4244.42
2011 Mercedes-Benz G550V8-5.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$2144.39Shop/Dealer Price$2674.27 - $4224.47
2012 Mercedes-Benz G550V8-5.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$2144.39Shop/Dealer Price$2674.27 - $4224.47
2015 Mercedes-Benz G550V8-5.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$2914.83Shop/Dealer Price$3637.28 - $5765.28
2010 Mercedes-Benz G550V8-5.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1252.91Shop/Dealer Price$1559.95 - $2441.56
2015 Mercedes-Benz G550V8-5.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1304.51Shop/Dealer Price$1624.42 - $2544.71
2018 Mercedes-Benz G550V8-4.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$758.06Shop/Dealer Price$920.37 - $1367.27
2017 Mercedes-Benz G550V8-4.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$758.06Shop/Dealer Price$921.04 - $1368.44
Show example Mercedes-Benz G550 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.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(7)

Rating Summary
7
0
0
0
0
7
0
0
0
0

Dan

39 years of experience
965 reviews
Dan
39 years of experience
Mercedes-Benz G550 V8-5.5L - Mass Airflow Sensor - Cumming, Georgia
Dan was quick and efficient with many different things. Everything is working great now.

Tabitha

17 years of experience
314 reviews
Tabitha
17 years of experience
Mercedes-Benz G550 V8-5.5L - Headlight Bulb Replacement (Driver Side Low Beam) - La Jolla, California
very knowledgable, patient and good comunicator., detailed explanations.

Ruben

14 years of experience
86 reviews
Ruben
14 years of experience
Mercedes-Benz G550 V8-5.5L - Pre-purchase Car Inspection - Van Nuys, California
Ruben was fantastic!! He arrived on time and meticulously looked over the dealer used car we were looking to purchase. He was very friendly and knowledgable and was happy to answer any questions we had. He was very factual and direct when observing the car, and found a number a faults with it that the the dealer didn't disclose. Ruben saved us from buying a lemon and for that we are truly grateful! Definitely recommend Ruben for a pre-purchase car inspection, he potentially saved us thousands in repair costs that we would have had to pay for if we followed through with buying this lemon Mercedes.

Nazareth

27 years of experience
266 reviews
Nazareth
27 years of experience
Mercedes-Benz G550 V8-5.5L - Oil Change - Pasadena, California
Nazareth is an exceptionally competent and nice person, It was a pleasure to deal with. Highly recommending his service.

Excellent Rating

(7)

Rating Summary
7
0
0
0
0
7
0
0
0
0
Number of Mercedes-Benz G550 services completed
77+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1000+
experts on our platform

Recent articles & questions

Symptoms of a Bad or Failing Camshaft Position Sensor
Common signs include the Check Engine Light coming on, the vehicle not starting, and an overall reduction in vehicle drive quality.
How Long Does an Ambient Temperature Sensor (Switch) Last?
In In many late-model vehicles, the need to manually adjust heat and air conditioning has been eliminated. You can actually set your car’s computer to regulate the cooling and heating process based on the temperature at which you feel most...
How to Replace a Coolant Level Sensor
Coolant level sensors are faulty if the coolant level sensor light stays on extensively or the engine overheats without the light coming on.

my car dont shift in high gears, but the transmission is good.

Hello. There are quite a few different parts that can cause this. It can be a transmission speed sensor, but a bad or defective throttle sensor can also cause this. If this started right after the throttle sensor was replaced,...

Check engine light flashing, sucking fuel, procrastinating when accelerating...

This is a very odd set of symptoms. I would suggest ruling out any fuel-related issues as the poor fuel economy and lack of power could be related to faulty sensors like the throttle body sensor, mass air flow sensor,...

Location of coolant temperature sensor location on a 2016 Chrysler 200

the coolant temperature sensor is located on the end of engine block above thermostat housing hose connection.

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com