Saturn L300 Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a Saturn L300 Oxygen Sensor Replacement is $221 with $81 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2004 Saturn L300L4-2.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$320.56Shop/Dealer Price$365.55 - $492.42
2002 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1490.91Shop/Dealer Price$1828.97 - $2839.04
2004 Saturn L300V6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$668.43Shop/Dealer Price$800.90 - $1194.12
2004 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1490.91Shop/Dealer Price$1829.00 - $2839.08
2001 Saturn L300V6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$668.43Shop/Dealer Price$802.37 - $1196.70
2001 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1490.91Shop/Dealer Price$1829.14 - $2839.33
2003 Saturn L300V6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$668.43Shop/Dealer Price$800.91 - $1194.15
2003 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1490.91Shop/Dealer Price$1829.00 - $2839.08
Show example Saturn L300 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.

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Meet some of our expert Saturn mechanics

Real customer reviews from Saturn owners like you.

Excellent Rating

(43)

Rating Summary
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Timothy

23 years of experience
107 reviews
Timothy
23 years of experience
Saturn L300 V6-3.0L - Check Engine Light is on - Milton, Washington
Timothy was terrific, highly knowledgeable and very personable. I had scheduled an appointment to have my daughter's O2 sensors replaced, but after he got here and assessed the situation, he said that we didn't need them replaced. He cleaned out a few areas that might have been causing the problem which reset the check engine light. I didn't get charged for anything except a diagnostic and the gas treatment he put in the car. The repair shop we had originally checked with had said the sensors needed replacing and quoted us $400 to do so and I'm sure if we had gone there instead of with Timothy, they would have been replaced without actually fixing the problem. Timothy was up front about everything he was doing in the car and gave us a list of possible upcoming maintenance items. I loved the service and will definitely use it again.

Jasmine

24 years of experience
102 reviews
Jasmine
24 years of experience
Saturn L300 V6-3.0L - Brake Pads Replacement (Rear) - Milwaukee, Wisconsin
Right on time! Did the work in 1 hour, neat, clean. Brakes worked. Awesomely! Would recommend to anyone! Did the work on a Sunday at 11 am right in my driveway while I cleaned out my garage. An awesome way to work done on your car.

Noe

37 years of experience
604 reviews
Noe
37 years of experience
Saturn L300 V6-3.0L - Check Engine Light is on - Kent, Washington
Noe explained the engine light issue and gave me a detailed report on what needed to be fixed. I was very impressed with how friendly and knowledgeable he was.

Jonathan

36 years of experience
522 reviews
Jonathan
36 years of experience
Saturn L300 V6-3.0L - Car starts and then dies - Hudson, Florida
Excelent !.....

Excellent Rating

(43)

Rating Summary
42
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Number of Saturn L300 services completed
473+
services done by our mechanics
TOTAL NUMBER OF EXPERT Saturn MECHANICS
700+
experts on our platform

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