How much does it cost to replace the oxygen sensor on a Toyota Corolla?

Context: As Toyota Corolla models span years and engine configurations, the oxygen sensor—an essential part of the exhaust and emissions system—may need replacement at different costs. This guide outlines typical pricing, factors that influence price, and practical tips for budgeting and shopping around.

On average, replacing an oxygen sensor in a Corolla typically runs about 150 to 350 USD per sensor, including parts and labor. Higher costs occur when OEM Toyota parts are used, when multiple sensors must be replaced, or when dealership service is chosen.

The exact price depends on where the sensor is located in the exhaust (before or after the catalytic converter), whether you choose aftermarket or OEM Toyota parts, the labor rate in your area, and whether your car requires replacement of one sensor or multiple sensors plus potential diagnostic work.

What affects the cost

Several real-world factors drive the price tag for an oxygen sensor replacement on a Corolla.

• Sensor location and quantity: Most Corolla models use two sensors (an upstream/pre-cat and a downstream/post-cat). Some configurations or future diagnostics could require more than one replacement.


• Parts quality: Aftermarket sensors are typically cheaper than OEM/Toyota-branded parts, but OEM parts are often favored for fit and longevity.


• Labor rates: Shop rates vary by region and whether the work is done at a dealership or an independent shop; urban areas generally cost more.


• Vehicle year and engine variant: Newer models and hybrid variants may have different sensor configurations and replacement procedures, affecting price.


• Exhaust system condition: Rust or corrosion around the sensor ports can increase labor time and costs.


• Additional diagnostics or repairs: If the fault is tied to wiring, connectors, or related emissions components, those issues may add to the total.

In practice, the typical cost range for a single sensor replacement is roughly 150 to 350 USD, while replacing two sensors may run about 300 to 700 USD depending on part choices and labor rates. Dealers charging OEM parts typically push costs toward the higher end of this range.

What to expect during replacement

Understanding the process helps you budget and assess quotes.

• Diagnosis and confirmation of the faulty sensor using a scan tool and live data


• Part selection (upstream vs downstream; aftermarket vs OEM)


• Replacement procedure and sensor installation


• System test and readiness checks (emissions readiness, idle stability, and a test drive)


• Review of warranty coverage and potential follow-up if the problem recurs

Some shops may offer bundled pricing if they replace both sensors at once, which can reduce overall labor time and cost.

Cost ranges by scenario

These scenarios reflect common pricing in the United States, with caveats for regional variation and part choice.

• Single aftermarket sensor replacement (parts + labor): typically 150–250 USD


• Single OEM/Toyota sensor (dealer parts) replacement: typically 210–420 USD


• Two sensors replaced (both upstream and downstream) with aftermarket parts: typically 300–700 USD


• Two sensors replaced with OEM/Toyota parts (dealer service): typically 450–900 USD

When requesting quotes, ask whether the price includes tax, disposal fees, and any applicable disposal or environmental charges. Some shops may include a complimentary diagnostic check or a short follow-up test if a check engine light returns after replacement.

Summary

For most Toyota Corolla owners, replacing one oxygen sensor typically costs about 150–350 USD when using aftermarket parts, including labor. Replacing both sensors can push the total to roughly 300–700 USD, with OEM/dealer parts and higher labor rates placing you toward the upper end of the range. Shopping around, obtaining itemized quotes, and understanding whether a quote covers parts, labor, and taxes can help you secure the best value and avoid surprise charges. Regular maintenance and timely replacement upon diagnostic confirmation can prevent longer-term emissions and engine issues.

Is it worth replacing an oxygen sensor?

A well-working O2 sensor will be an important component of a consistent running car. Still, a bad oxygen sensor can probably lead to bad gasoline efficiency, a bad odor in your vehicle, and a below-level running engine.

Can I drive my car with a bad oxygen sensor?

Yes, you can drive with a bad oxygen sensor, but it is not recommended for extended periods as it can lead to decreased fuel efficiency, poor engine performance, and potential damage to your catalytic converter. If the check engine light is on and flashing, do not drive and have the vehicle serviced immediately. 
Potential problems from driving with a bad O2 sensor

• Poor fuel economy: The car's computer may incorrectly adjust the air-fuel mixture, causing it to run too rich and use more fuel than necessary. 
• Engine performance issues: You may experience a rough idle, engine hesitation, or a loss of power. 
• Catalytic converter damage: If the engine runs too rich, unburnt fuel can enter the exhaust and overheat the catalytic converter, leading to a costly failure. 
• Increased emissions: A failing O2 sensor can cause your vehicle to fail an emissions test. 
• Other issues: You may also notice unusual smells from the exhaust or other knocking and pinging sounds. 

What to do

• Address the issue promptly: Get the sensor replaced as soon as you can to avoid further problems. 
• If the check engine light is flashing: Do not drive the car. This indicates a serious problem and could cause immediate damage. 
• Consider the age of your vehicle: Sensors can last a long time, but if your vehicle is older or has high mileage, it may be a good idea to have them checked and replaced for better performance and lower emissions, recommend Sterling McCall Toyota and Finnegan Chevrolet Buick GMC. 

How much would a mechanic charge to replace an O2 sensor?

The total cost to replace an O2 sensor typically ranges from $200 to $500 for parts and labor, though some sources suggest a slightly lower average of $200 to $350 for standard vehicles. The final price depends on factors like vehicle make and model, labor costs, parts cost, and whether the sensor is in an accessible or hard-to-reach location. DIY replacement is an option, with parts costing anywhere from $20 to $300 or more.
 
Cost breakdown

• Parts: The cost for a new oxygen sensor can range from $20 to over $300, depending on the brand, vehicle, and type of sensor. 
• Labor: Professional installation typically costs between $150 and $600, depending on the complexity and hourly labor rates at your shop. Some jobs, especially if the sensor is hard to access or rusted in place, can be more expensive. 
• DIY: If you are comfortable doing the work yourself, you can save on labor costs. Parts can range from $20 to $300 or more, making the total cost for a DIY replacement between $20 and $300. 

Factors that affect the cost

• Vehicle: Luxury vehicles may have higher parts and labor costs than standard passenger cars. 
• Location: Labor rates vary by geographic location. 
• Sensor type: Upstream sensors (before the catalytic converter) can be slightly more expensive than downstream sensors (after the converter). 
• Accessibility: A sensor that is difficult to reach due to its location will likely require more labor time and therefore increase the total cost. 

Signs that you may need an O2 sensor replacement
Your check engine light is on, Decreased fuel economy, Rough engine idle or misfires, A smell of rotten eggs from the exhaust, and Engine hesitation.

How much is a oxygen sensor for a Toyota Corolla?

between $490 and $583
The average cost for a Toyota Corolla Oxygen Sensor Replacement is between $490 and $583.