Saturn LW300 Oxygen Sensor Replacement at your home or office.

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

Get an upfront price

Service Area

Average rating from customers who
received a Oxygen Sensor Replacement.
Learn More

$329.31 - $762.45

Price range for all vehicles


YourMechanic Benefits

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.

Average rating from customers who
received a Oxygen Sensor Replacement.
Learn More


Oxygen Sensor Replacement Estimate for Saturn LW300

Saturn LW300 Oxygen Sensor Replacement costs $546 on average.

CarServiceEstimateShop/Dealer Price
2002 Saturn LW300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1429.91Shop/Dealer Price$1777.92 - $2795.45
2002 Saturn LW300V6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$583.63Shop/Dealer Price$720.13 - $1102.99
2001 Saturn LW300V6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$588.63Shop/Dealer Price$724.41 - $1106.73
2003 Saturn LW300V6-3.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$583.63Shop/Dealer Price$721.81 - $1105.93
2003 Saturn LW300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1429.91Shop/Dealer Price$1776.76 - $2793.41
2001 Saturn LW300V6-3.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1429.91Shop/Dealer Price$1774.83 - $2790.03
Show example Saturn LW300 Oxygen Sensor Replacement prices

Oxygen Sensor Replacement Service

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

GET A QUOTE FOR YOUR CAR

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Saturn mechanics

Real customer reviews from Saturn owners like you.

Excellent Rating


YourMechanic Saturn Oxygen Sensor Replacement Service

Average Rating

4.9/5

Number of Reviews

19

Rating Summary
18
1
0
0
0
18
1
0
0
0

Lucas

8 years of experience
33 reviews
Lucas
8 years of experience
Saturn LW300 - Oxygen Sensor Replacement (Front/Upper/Upstream, Rear/Lower/Downstream) - Gaithersburg, Maryland
Lucas was punctual, proficient, and professional. He answered all of my questions and gave me sound advice regarding a problem I have with another vehicle.

Ben

39 years of experience
1113 reviews
Ben
39 years of experience
Saturn LW300 - Oil Change - Houston, Texas

Chris

14 years of experience
122 reviews
Chris
14 years of experience
Saturn LW300 - Car is not starting - North Hollywood, California
Very smart

Honorio

17 years of experience
757 reviews
Honorio
17 years of experience
Saturn Ion - Oxygen Sensor Replacement (Front/Upper/Upstream) - San Jose, California
Honorio showed up on time while I was at work and replaced my o2 sensor without delay right outside my workplace--while I was on the clock, which was ideal. Now my idling issue and fuel mix are back to normal and my car is running smooth. Excellent service.

Excellent Rating


YourMechanic Saturn Oxygen Sensor Replacement Service

Average Rating

4.9/5

Number of Reviews

19

Rating Summary
18
1
0
0
0
18
1
0
0
0
Red-stars EXCELLENT RATING ON
Number of Saturn Oxygen Sensor Replacement services completed
209+
services done by our mechanics
TOTAL NUMBER OF EXPERT Saturn MECHANICS
500+
experts on our platform

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.

1-800-701-6230 · hi@yourmechanic.com