Exhaust · important priority
Oxygen Sensor Replacement Cost & Pricing
Replace a failed O2 sensor that causes poor fuel economy and triggers the check engine light.
Typical Oxygen Sensor Replacement cost
$150–$500, with an average estimate of $275 before vehicle-specific adjustments.
What to expect
Difficulty: moderate. Typical labor time: 1–3 hours.
Mechanic's tip
A bad O2 sensor can reduce fuel economy by up to 40%. Always get the diagnostic trouble code (DTC) read first — the code will tell you which sensor is bad (upstream or downstream, left or right bank) so you're not replacing the wrong one.