Mercedes-Benz SL550 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

(36)

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

(36)

Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a Mercedes-Benz SL550 Oxygen Sensor Replacement is $304 with $209 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2013 Mercedes-Benz SL550V8-4.7L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$949.19Shop/Dealer Price$1167.74 - $1800.89
2016 Mercedes-Benz SL550V8-4.7L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$929.19Shop/Dealer Price$1147.76 - $1780.92
2014 Mercedes-Benz SL550V8-4.7L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$929.19Shop/Dealer Price$1147.76 - $1780.92
2014 Mercedes-Benz SL550V8-4.7L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$929.19Shop/Dealer Price$1147.74 - $1780.88
2008 Mercedes-Benz SL550V8-5.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$512.59Shop/Dealer Price$634.55 - $960.92
2009 Mercedes-Benz SL550V8-5.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1272.11Shop/Dealer Price$1583.92 - $2479.91
2018 Mercedes-Benz SL550V8-4.7L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$934.19Shop/Dealer Price$1152.62 - $1785.68
2017 Mercedes-Benz SL550V8-4.7L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$934.19Shop/Dealer Price$1152.99 - $1786.34
Show example Mercedes-Benz SL550 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

(36)

Rating Summary
35
0
0
1
0
35
0
0
1
0

Peter

36 years of experience
346 reviews
Peter
36 years of experience
Mercedes-Benz SL550 V8-5.5L - Pre-purchase Car Inspection - Mesa, Arizona
Peter performed a pre purchase inspection on a 2011 MB SL550. This was an internet sale and I was not present at the dealership. Peter arrived promptly at the time arranged. The dealership owner said he was thorough and professional. I received a very thorough report within an hour of completion of his visit. Very detailed.

Robert

40 years of experience
37 reviews
Robert
40 years of experience
Mercedes-Benz SL550 V8-4.6L Turbo - Transmission Fluid Service - Phoenix, Arizona
He was friendly , competent and took his time to do the job correctly . I would definitely use him for my future auto needs

Juan

10 years of experience
216 reviews
Juan
10 years of experience
Mercedes-Benz SL550 V8-5.5L - Coolant Reservoir - Santa Ana, California
Juan came prepared for the task and knew exactly what was needed. He was very pleasant and particularly thorough.

Charles

27 years of experience
38 reviews
Charles
27 years of experience
Mercedes-Benz SL550 V8-4.7L Turbo - Trunk Lift Support Shocks Replacement - Calabasas, California
Charles was courteous and professional.

Excellent Rating

(36)

Rating Summary
35
0
0
1
0
35
0
0
1
0
Number of Mercedes-Benz SL550 services completed
396+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

Symptoms of a Bad or Failing Injector Control Pressure Sensor
Common signs include starting issues, engine misfires, the Check Engine Light coming on, and a decrease in power, acceleration, and fuel economy.
How Long Does an Injector Control Pressure Sensor Last?
A A diesel engine is a very sensitive and complicated piece of machinery. Getting a diesel to crank will require a number of parts to work together. Among the most vital systems on a diesel engine is the fuel injection....
How Long Does a Yaw Rate Sensor Last?
While While taking a curve at a high rate of speed seems like fun, it can also be quite dangerous. Luckily, there are a number of systems on a car that can make taking hairpin turns quickly much safer. The...

Car won't start after replacing cam sensor - 2006 Scion xA

Hello. You will need to have the computer scanned and system checked for codes indicating the problem. You may have a bad crankshaft sensor (https://www.yourmechanic.com/services/crankshaft-position-sensor-replacement) or computer problems with the anti-theft system. If you would like to have this corrected,...

PCV valve and scheduled maintenance

Any time an engine has been neglected like this you should not hesitate to do any repairs to start to get the vehicle back on it's scheduled maintenance. You should have the PCV changed and change the oil and filter...

High fuel consumption

The Space Gear used both 4 cylinder (2.4L) and 6 cylinder (3.0L) engines and there was also an AWD (All Wheel Drive) version, not to mention diesel versions. Consequently, the curb weight of the various versions of the vehicle ranged...

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