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The DENSO 234-2004 is a direct-fit oxygen sensor for specific Toyota and Lexus applications. It is an upstream (pre-catalyst) air/fuel ratio sensor, so it reads the exhaust before the catalytic converter and feeds the engine computer the mixture data it needs. DENSO is an original-equipment supplier to Toyota, and this sensor is built to the same fit and connector as the factory part, which is why owners choose it over generic universal sensors that need splicing. It suits drivers replacing a failed sensor on a compatible vehicle who want a plug-and-play part rather than a splice-in universal unit.
In stock
Owners of compatible Toyotas and Lexus models report the sensor plugs in and clears oxygen-sensor codes, with fuel trim and idle returning to normal. Complaints center on fitment mistakes and on the part not solving a problem caused elsewhere.
DENSO Oxygen Sensor, #234-2004
