Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Saturn L300

Saturn L300 Oxygen Sensor Replacement costs $180 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$130 to $200
Labor: $70 -$80
Parts: $60 -$120
Average Dealer price
$214 to 333
Average Shop price
$159 to 233
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
2002 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$199.70Shop/Dealer Price$246.64 - $354.81
2004 Saturn L300L4-2.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$134.18Shop/Dealer Price$164.81 - $223.89
2001 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$197.30Shop/Dealer Price$243.67 - $350.05
2004 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$155.28Shop/Dealer Price$191.17 - $266.05
2003 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$199.70Shop/Dealer Price$246.65 - $354.83
2004 Saturn L300L4-2.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$171.16Shop/Dealer Price$210.97 - $297.72
2002 Saturn L300V6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$200.30Shop/Dealer Price$247.48 - $356.16
2005 Saturn L300V6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$197.30Shop/Dealer Price$243.71 - $350.12
Show example Saturn L300 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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Meet some of our expert Saturn mechanics

Real customer reviews from Saturn owners like you.

395 reviews
Tien
18 years of experience
Mr. Phan was early to his appointment and fixed front and back brakes while my car was parked at work in about an hour. He was very polite and professional and now my brakes do not squeek when I apply pressure. He was so honest he told me my back brakes did not need to be replaced but I told him to do it anyways because I thought it was a good idea since I have never replaced them since I have owned my car. This is my second time using mobile mechanic and I am very pleased with the pricing structure and level of professionalism. I would definalty reccomend this service to my friends and family.
2007 SATURN VUE - BRAKE PADS REPLACEMENT (FRONT, REAR)
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212 reviews
Enrique
16 years of experience
Great mechanic and on time..would recommend him anytime
2007 SATURN VUE - OIL CHANGE
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75 reviews
Timothy
17 years of experience
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.
2002 SATURN L300 - CHECK ENGINE LIGHT IS ON INSPECTION
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48 reviews
TJ
21 years of experience
Very helpful, saved me a lot of money as he checked my Alternator and contrary to what Midas told me, he said the part did not need to be replaced!
2006 SATURN ION - OTHER INSPECTIONS
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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
2002 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$199.70Shop/Dealer Price$246.64 - $354.81
2004 Saturn L300L4-2.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$134.18Shop/Dealer Price$164.81 - $223.89
2001 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$197.30Shop/Dealer Price$243.67 - $350.05
2004 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$155.28Shop/Dealer Price$191.17 - $266.05
2003 Saturn L300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$199.70Shop/Dealer Price$246.65 - $354.83
2004 Saturn L300L4-2.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$171.16Shop/Dealer Price$210.97 - $297.72
2002 Saturn L300V6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$200.30Shop/Dealer Price$247.48 - $356.16
2005 Saturn L300V6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$197.30Shop/Dealer Price$243.71 - $350.12
Show example Saturn L300 Oxygen Sensor Replacement prices

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