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Chevrolet Metro Rear Oxygen Sensor Replacement

An oxygen sensor replacement is usually a pretty straightforward and affordable task. We stress the term usually because replacement cost can vary, depending on what type of car you have.

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Average Shop Price $428
RepairSmith Price $243
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This range covers an average Rear Oxygen Sensor replacement. Tell us your car to get a guaranteed price from RepairSmith.

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Chevrolet Metro Rear Oxygen Sensor Replacement

RepairSmith offers upfront and competitive pricing. The average cost for Chevrolet Metro Rear Oxygen Sensor Replacement is $194. Drop it off at our shop and pick it up a few hours later, or save time and have our Delivery mechanics come to you.

Car
Location
Quoted on
Price
2000 Chevrolet Metro
1.3L L4 LSi • 105,000 miles
Diamond Bar CA 91765
Nov 21, 2020
$187 - $229
1998 Chevrolet Metro
1.3L L4 LSi • 255,000 miles
Oxnard CA 93036
Oct 31, 2020
$164 - $200
1999 Chevrolet Metro
1.3L L4 Base • 266,000 miles
West Covina CA 91791
Oct 29, 2020
$156 - $190
1999 Chevrolet Metro
1.0L L3 Base • 327,000 miles
Victorville CA 92394
Oct 25, 2020
$173 - $211
1998 Chevrolet Metro
1.0L L3 Base • 164,000 miles
Santa Monica CA 90410
Oct 13, 2020
$178 - $218
1998 Chevrolet Metro
1.0L L3 Base • 49,000 miles
Long Beach CA 90815
Oct 10, 2020
$171 - $209
2000 Chevrolet Metro
1.3L L4 Base • 163,000 miles
Lawndale CA 90260
Oct 7, 2020
$174 - $212
1998 Chevrolet Metro
1.0L L3 Base • 326,000 miles
Fresno CA 93702
Sep 27, 2020
$179 - $219
2000 Chevrolet Metro
1.0L L3 Base • 245,000 miles
La Mesa CA 91941
Sep 26, 2020
$184 - $224
1999 Chevrolet Metro
1.3L L4 Base • 180,000 miles
Pacifica CA 94044
Sep 24, 2020
$176 - $216
Last Updated:
Dec 17, 2020 6:25 PM
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What is a Rear Oxygen Sensor?

This might blow your mind but…oxygen sensors (O2s) are sensors that measure oxygen. Yep, the sensors calculate the amount of oxygen in the exhaust stream, then share that information with your car’s main computer. Most modern cars have at least two oxygen sensors: one before the catalytic converter and one after the catalytic converter. In case you were wondering, the catalytic converter, which is located in the exhaust system, is an emissions control device that cleans up the fumes leaving your engine. Anyhow, the front oxygen sensor (also known as an upstream oxygen sensor) is a key input to your car’s computer for fuel control. The computer uses information from the sensor to estimate the engine’s air-fuel mixture. Then, it adjusts fuel delivery accordingly. On the other hand, the rear oxygen sensor (also known as a downstream oxygen sensor) primarily monitors the performance of the catalytic converter. The rear sensor has very little, if any, input regarding fuel control. Oh, and one more thing – most modern oxygen sensors have built-in heaters. When you first start your engine when it’s cold, the heater element gets the sensor nice and toasty. That allows the sensor to get up-to-speed and begin operating more quickly.

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Symptoms of a failing Rear Oxygen Sensor

Check engine light

If your car’s rear oxygen sensor isn’t doing its job, chances are, the computer will notice and turn on the check engine light. The device will also store corresponding diagnostic trouble codes (DTCs) in its brain. Your mechanic can retrieve said codes using an electronic device, called a scan tool.

Failed emissions test

Is it time for your routine emissions test? Well, guess what – you’re not going to pass if the check engine light is on from a bad rear oxygen sensor. You also won’t pass if the rear oxygen sensor is out to lunch and it’s preventing your car’s computer from running its system self-tests.

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How urgent is a Rear Oxygen Sensor Replacement?

The rear oxygen sensor is less of a troublemaker than the front oxygen sensor. For the most part, the rear oxygen sensor just polices the catalytic converter. So, it’s unlikely to leave you stranded and it shouldn’t cause any additional harm to your vehicle.

But it will keep that annoying check engine light illuminated and, really, do you want to look at that thing every day? Plus, a bad rear oxygen sensor can cause you to fail a state emissions test – and nobody wants that.

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