O2 sensor replacement cost
Most shops charge $50–$190 in labor, plus $40–$200 for the oxygen sensor.
Updated November 2026
Where good SwaxFix bids tend to land: the low end, because shops compete for the job.
See what shops near you will actually charge.
Free to post. Shops bid blind: they see your car, never you. Buy the part yourself, shops bid on labor only. Already have a quote? Check if it’s fair.What the job involves
The shop confirms which sensor is at fault from the code and live data, unplugs it, removes it with a sensor socket (often with heat or penetrant on rusty threads) and fits the new one.
Signs you need it
- Check engine codes P0130 to P0167
- Worse fuel economy
- Failed emissions test
- Rough idle
What changes the price
- Upstream (air-fuel) sensors cost more than downstream ones
- Seized sensors can take extra time
- OEM-brand sensors avoid repeat lights
Shop or do it yourself?
Easy if the sensor is reachable and not seized.
Questions drivers ask
How much does o2 sensor replacement cost?
At a typical shop, labor runs $50 to $190 (about 24 min to 1.2 hr of work), and the oxygen sensor costs about $40 to $200. That puts most jobs between $90 and $390 total. With SwaxFix you can buy the part yourself and have local shops bid on the labor only.
How many O2 sensors does my car have?
Usually two to four: one before and one after each catalytic converter.
Upstream or downstream?
The code tells you. Bank 1 Sensor 1 is upstream on the cylinder-1 side.
Can a bad O2 sensor damage the engine?
Not directly, but running rich over time can foul plugs and harm the catalytic converter.
Find a shop
Want to compare shops first? Browse auto repair near me, or post your job and let them come to you.