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O2 Sensor - Front


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How hard is it to replace the front O2 sensor? Which bank is #1?

depends on if it is sensor 1 or sensor 2.

Bank 1 is the bank of cylinders closest to the firewall.

Funny, this is the third time I have answered this question in two days.

Must be a rash of sensors going bad.

steviej

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  • 2 weeks later...

How hard is it to replace the front O2 sensor? Which bank is #1?

depends on if it is sensor 1 or sensor 2.

Bank 1 is the bank of cylinders closest to the firewall.

Funny, this is the third time I have answered this question in two days.

Must be a rash of sensors going bad.

steviej

Turned out to be front Air/Fuel ratio sensor. I purchased for $174 at CarQuest and installed in 15 minutes.

Lexus charged me $225 for same sensor for bank1 and $210 for labor.

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