Mercedes-Benz 300TE 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

(18)

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

(18)

Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a Mercedes-Benz 300TE Oxygen Sensor Replacement is $272 with $132 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1993 Mercedes-Benz 300TEL6-3.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$699.88Shop/Dealer Price$842.40 - $1255.79
1993 Mercedes-Benz 300TEL6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1245.31Shop/Dealer Price$1523.35 - $2350.25
1991 Mercedes-Benz 300TEL6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$426.01Shop/Dealer Price$499.27 - $711.72
1991 Mercedes-Benz 300TEL6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$465.95Shop/Dealer Price$549.19 - $791.60
1990 Mercedes-Benz 300TEL6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$426.01Shop/Dealer Price$501.84 - $716.23
1992 Mercedes-Benz 300TEL6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$706.03Shop/Dealer Price$849.54 - $1272.19
1992 Mercedes-Benz 300TEL6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$785.91Shop/Dealer Price$949.17 - $1431.57
1993 Mercedes-Benz 300TEL6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$785.91Shop/Dealer Price$949.14 - $1431.52
Show example Mercedes-Benz 300TE 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

(18)

Rating Summary
17
0
0
0
1
17
0
0
0
1

Joshua

28 years of experience
709 reviews
Joshua
28 years of experience
Mercedes-Benz 300TE L6-3.0L - Car AC Repair - Pittsburg, California
Joshua was awesome! Super friendly and knowledgeable. Would definitely use his services again!

Joe

16 years of experience
453 reviews
Joe
16 years of experience
Mercedes-Benz 300TE L6-3.0L - Valve Cover Gasket - Nashville, Tennessee
Joe is the man!

Joe

16 years of experience
453 reviews
Joe
16 years of experience
Mercedes-Benz 300TE L6-3.0L - Brake Pads Replacement (Front) - Nashville, Tennessee
Hire Joe, he's great.

Kevin

34 years of experience
234 reviews
Kevin
34 years of experience
Mercedes-Benz 300TE L6-3.0L - Alternator - Long Beach, California
Friendly and knowledgeable!!

Excellent Rating

(18)

Rating Summary
17
0
0
0
1
17
0
0
0
1
Number of Mercedes-Benz 300TE services completed
198+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

What Does the Rain and Light Sensor Warning Light Mean?
The rain and light sensor warning light indicates when there is an issue with the sensor system. It will remain deactivated until fixed.
How to Replace an EVP Position Sensor
The EGR valve is monitored by a valve position sensor. This sensor helps your car's EGR system to run more efficiently and better control emissions.
What Sensors Do All Cars Have? And What Optional Ones Are There?
Modern cars have an increasing amount of sensors. Most cars have an oxygen sensor and a throttle position sensor, but parking sensors are optional.

After sensor replacement, 2nd diagnostic revealed P0139

No, it is not the catalyst. The P0139 code (https://www.yourmechanic.com/article/p0139-obd-ii-trouble-code-o2-sensor-circuit-slow-response-bank-1-sensor-2) is for the O2 sensor before the catalyst. The code is illuminated when the engine control module is testing the O2 sensor and it cuts the fuel to see if...

Car cranks more times than normal before starting.

If the engine is not starting as readily as it used to, there is something wrong. There are many causes of hard starting but illustrative ones are a faulty engine coolant temperature switch (sensor), worn spark plugs, inadequate fuel delivery...

Brake, Battery sensor, lights, and a crackling noises.

The issue sounds to be a ground return wire on the speakers is shorting out with a ground circuit in the vehicle causing the lights and sensors to register a warning light. The brake light could be coming on for...

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