Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Estimate for Subaru Forester

Subaru Forester Oxygen Sensor Replacement costs $295 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$213 to $509
Labor: $105 -$120
Parts: $108 -$389
Average Dealer price
$356 to 917
Average Shop price
$260 to 611
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
2005 Subaru ForesterH4-2.5L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$415.01Shop/Dealer Price$514.29 - $763.13
2001 Subaru ForesterH4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$234.85Shop/Dealer Price$289.19 - $402.99
1998 Subaru ForesterH4-2.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$219.57Shop/Dealer Price$270.02 - $372.31
2017 Subaru ForesterH4-2.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$303.60Shop/Dealer Price$375.09 - $540.43
2009 Subaru ForesterH4-2.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$354.04Shop/Dealer Price$438.10 - $641.23
2002 Subaru ForesterH4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$237.29Shop/Dealer Price$292.14 - $407.69
2016 Subaru ForesterH4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$237.90Shop/Dealer Price$293.04 - $409.15
2010 Subaru ForesterH4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$225.93Shop/Dealer Price$278.04 - $385.15
Show example Subaru Forester 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 Subaru mechanics

Real customer reviews from Subaru owners like you.

445 reviews
Chris
17 years of experience
Thank you Chris. You did an excellent job on my Subaru Forester.
2003 SUBARU FORESTER - OIL CHANGE
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136 reviews
Casey
19 years of experience
Casey was awesome. He arrive a little late, but considering the horrible traffic, totally understandable for a 7PM appointment. Explained the situation and get the work done quickly. Did courtesy inspection and suggested me to change the front pads as well since they start having speaking noise. Will schedule him for the front pad replacement sometime next week, if he is available :p
2012 SUBARU FORESTER - BRAKE PADS REPLACEMENT (REAR)
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77 reviews
Pete
11 years of experience
What a delightful experience we had when Pete came and changed our oil for us. Pete was on time and very professional. He was friendly and answered all of our questions. We will use Pete again in the near future for other repairs. We highly recommend Pete to our family and friends.
2007 SUBARU FORESTER - OIL CHANGE
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54 reviews
Kenneth
11 years of experience
Ken showed up bright and early for my inspection appointment at my house. He was very nice and professional and went through a 150 point inspection check list very thoroughly. Overall, he thought my new used car was in pretty good shape and gave it a clean bill of health. If I have any other work I need done I wouldn't hesitate to reach out to Ken again.
2014 SUBARU FORESTER - PRE-PURCHASE CAR INSPECTION
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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
2005 Subaru ForesterH4-2.5L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$415.01Shop/Dealer Price$514.29 - $763.13
2001 Subaru ForesterH4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$234.85Shop/Dealer Price$289.19 - $402.99
1998 Subaru ForesterH4-2.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$219.57Shop/Dealer Price$270.02 - $372.31
2017 Subaru ForesterH4-2.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$303.60Shop/Dealer Price$375.09 - $540.43
2009 Subaru ForesterH4-2.5LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$354.04Shop/Dealer Price$438.10 - $641.23
2002 Subaru ForesterH4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$237.29Shop/Dealer Price$292.14 - $407.69
2016 Subaru ForesterH4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$237.90Shop/Dealer Price$293.04 - $409.15
2010 Subaru ForesterH4-2.5LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$225.93Shop/Dealer Price$278.04 - $385.15
Show example Subaru Forester Oxygen Sensor Replacement prices

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1-800-701-6230 · hi@yourmechanic.com