Mazda Protege5 Oxygen Sensor Replacement at your home or office.

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$185.17 - $268.22

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Oxygen Sensor Replacement Estimate for Mazda Protege5

Mazda Protege5 Oxygen Sensor Replacement costs $227 on average.

CarServiceEstimateShop/Dealer Price
2002 Mazda Protege5L4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$295.35Shop/Dealer Price$359.72 - $526.33
2002 Mazda Protege5L4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$441.45Shop/Dealer Price$542.41 - $818.63
2003 Mazda Protege5L4-2.0LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$300.35Shop/Dealer Price$364.06 - $530.17
2003 Mazda Protege5L4-2.0LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$441.45Shop/Dealer Price$544.09 - $821.57
Show example Mazda Protege5 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.

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(4)

Rating Summary
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Xavier

15 years of experience
101 reviews
Xavier
15 years of experience
Mazda Protege5 - Oxygen Sensor Replacement (Rear/Lower/Downstream) - Jacksonville, Florida
First, comes early to the appointment, second the knowledge of the vehicle and all the specifications according to the car and finally the courtesy. In resume if I need something more that's gonna be my mechanic or any advice for my car or the cars that would have will be him. Thanks a lot.!!!

Terry

17 years of experience
51 reviews
Terry
17 years of experience
Mazda Protege5 - Oxygen Sensor Replacement (Rear/Lower/Downstream) - Atlanta, Georgia
It was a bit frustrating having an appointment cancellation and then having Terry arrive 1.5 hours late for the make up appointment without great communication. However, the service, once he arrived was friendly and competent. We installed my O2 sensor quickly (I had trouble disconnecting the old one).. The car still wasn't running right and he gave me some advice for a couple more things to try to get it running right. He also helped me pull out a broken spark plug boot that was stuck in the valve. I love the fact that I can purchase my own parts and do my own work and get some assistance for a reasonable price. It's amazing how much money this saves. A shop, or if they buy your O2 sensor for you- you pay 250-400. But here i could buy a quality part online for 35 and get it installed for 75. And I like that they'll help teach me how to do my own work on the car.

Kenneth

19 years of experience
626 reviews
Kenneth
19 years of experience
Mazda Protege5 - Oxygen Sensor Replacement (Front/Upper/Upstream) - Alhambra, California
Kenneth really does go out of his way to help ! I’ll keep booking him when needed

Chris

15 years of experience
419 reviews
Chris
15 years of experience
Mazda Protege5 - Oxygen Sensor Replacement (Front/Upper/Upstream) - San Francisco, California
Awesome! Fast!

Excellent Rating

(4)

Rating Summary
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Number of Mazda Protege5 Oxygen Sensor Replacement services completed
44+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mazda MECHANICS
1000+
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