When should you replace O2 sensors

Asked by Jan 27, 2016 at 11:43 AM about the 2004 Toyota Highlander Base

Question type: Maintenance & Repair

I have approx: 154,000 on 2004 Highlander and have read somewhere O2 sensors are only good for 100,00 miles then need replaced. What's the scoop?

3 Answers

85,485

If you are not getting a warning light on the dash, and are not picking up any codes, then leave them alone.

2 people found this helpful.
250

When they go bad

250

The only way to find out if they are bad and need changed is when your engine light turns on and you read it for codes like Rowefast stayed.

1 people found this helpful.

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