Repair Cost Guide

Oxygen sensor replacement cost
for a Toyota Corolla

Replacing the oxygen (O2) sensor on a Toyota Corolla involves locating the faulty sensor, disconnecting its electrical connector, and unscrewing it from the exhaust manifold or pipe. The cost is primarily driven by the price of the sensor itself, which varies by brand and whether it's an upstream (more expensive) or downstream unit, and the labour time required to access it, which can be higher if the sensor is seized.

$150 – $400
Typical fair price range · USD

Cost breakdown

Parts: ~$80-$250 / Labour: ~$70-$150

What affects the price

Sensor location (upstream bank 1 sensor is often more costly than a downstream sensor)
Brand of replacement part (OE Toyota vs. aftermarket)
Condition of exhaust hardware (rust and seized sensors increase labour time)

Can you do it yourself?

Yes (brief how) — With basic tools, the sensor is accessible from under the car. A special O2 sensor socket or wrench is highly recommended for removal.

Tips before you pay

Use an O2 sensor socket for easier removal and to avoid damaging the sensor's wiring.
Apply penetrating oil to the sensor threads well in advance if rust is present.
Ensure the engine is cold before starting to avoid burns from the hot exhaust components.

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More cost guides

Brake pads replacement — Toyota Corolla Alternator replacement — Toyota Corolla Timing belt replacement — Toyota Corolla

Estimate based on typical U.S. market rates as of July 2026. Actual prices vary by region, shop, and parts quality — always compare against a real quote using our Scam Checker.