When should oxygen sensors be replaced? 1999 LS400,130k miles.

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05-03-10, 04:46 PM

haulin79

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When should oxygen sensors be replaced? 1999 LS400,130k miles.

I have a 1999 LS400 with about 130k miles.

When should the oxygen sensors be replaced?
or
How often should they be replaced?

Thanks!

Last edited by haulin79; 05-03-10 at 04:50 PM.

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05-03-10, 05:37 PM

3UZFTE

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When your check engine light comes on.

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05-03-10, 09:24 PM

RA40

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+1 to that.
I asked same to the mechanic.

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05-04-10, 05:28 AM

python

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02 sensors even though arent throwing a code will cause bad gas mileage when they are getting old. i would start thinking about replacing the front ones around 150,000 or maybe sooner. use denso btw...not bosch

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