Oxygen Sensor Replacement Estimate for Mazda 323

Mazda 323 Oxygen Sensor Replacement costs $125 on average. Following is a breakdown of the labor and parts estimates.

Skip the repair shop - our mechanics come to you
YourMechanic Price
$120 to $138
Labor: $70 -$80
Parts: $50 -$58
Average Dealer price
$194 to 208
Average Shop price
$146 to 155
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
1993 Mazda 323L4-1.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$132.16Shop/Dealer Price$162.22 - $219.73
1994 Mazda 323L4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$131.09Shop/Dealer Price$160.95 - $217.72
1990 Mazda 323L4-1.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$131.01Shop/Dealer Price$160.80 - $217.47
1986 Mazda 323L4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$123.45Shop/Dealer Price$151.38 - $202.39
1988 Mazda 323L4-1.6L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$124.46Shop/Dealer Price$152.61 - $204.35
1991 Mazda 323L4-1.6LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementYourMechanic Price$132.16Shop/Dealer Price$162.21 - $219.72
1991 Mazda 323L4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$132.53Shop/Dealer Price$162.77 - $220.62
1990 Mazda 323L4-1.6LService typeOxygen Sensor - Front/Upper/Upstream ReplacementYourMechanic Price$131.09Shop/Dealer Price$160.95 - $217.71
Show example Mazda 323 Oxygen Sensor Replacement prices

Parts required for a Mazda 323 Oxygen Sensor Replacement

Meet some of our expert Mazda mechanics

Real customer reviews from Mazda owners like you.

287 reviews
Steven
9 years of experience
Very honest and wonderful he did a great job finding the problem and keeping me informed as well as the cost he was absolutely amazing he went above and beyond anything I asked of him. He stayed professional and cortious.
2004 MAZDA 3 - CAR WILL NOT TURN OVER INSPECTION
Want Steven's expert advice? Ask your question now. Its free!
75 reviews
Brikk
13 years of experience
Brikk is truly an asset to Yourmechanic.. He was very professional, technically proficient, and a good communicator with patience for the 1,000 questions I had. He arrived at my appointment early and didn't leave until he found out what was wrong. I will definitely use Brikk in the future.
1997 MAZDA B2300 - CAR IS NOT STARTING INSPECTION
Want Brikk's expert advice? Ask your question now. Its free!
52 reviews
Chris
13 years of experience
He was friendly and seem knowledgeable, I like that he was honest with me
2009 MAZDA CX-7 - CHECK ENGINE LIGHT IS ON INSPECTION
Want Chris's expert advice? Ask your question now. Its free!
28 reviews
Joseph
13 years of experience
Joseph is a reliable and professional mechanic. He explained to me afterwards everything that was done to the car, took a test drive to ensure the work was done properly and even recommended a brake fluid change after he noted weak brakes. I booked him for the brake fluid (conducted 03/03/16) and the car feels like new. I would HIGHLY recommend Joseph.
2005 MAZDA 3 - STRUT ASSEMBLY REPLACEMENT (FRONT)
Want Joseph's expert advice? Ask your question now. Its free!

All about Oxygen Sensor Replacement

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 Replacement Estimates for Popular Mazda Models