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Discussion Starter · #1 ·
Just did mine (upstream only) as mostly PM -- ~104,000 miles and 16 years old!

It screws out/in like most, unlike the downstream RAV4.1 sensor that you can read about elsewhere on here.

I went with the much cheaper Walker (250-24360 on RockAuto; check for yours) despite my bias toward Bosch, Denso, NGK/... versions. This non-Cal Walker had the correct plug as well as lead length.

I sprayed the old one's threads generously with Liquid Wrench last night, then this morning a standard 7/8" O2 sensor socket worked great for both removal and installation but watch your hands, etc. on the sharp edges of the heat shield, etc. No injuries for me, fortunately! :D
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