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The DENSO 234-4437 is a direct-fit oxygen sensor for specific Toyota, Lexus and Scion applications. DENSO is an original-equipment supplier, so this sensor is built to the same design as the factory part, with a pre-assembled connector and no splicing needed. It suits owners chasing a check-engine light for an O2 sensor code who want an OE-style replacement rather than a universal splice-in sensor. Compared with universal sensors it costs more effort to shop for the right number, but it installs faster and matches factory fit.
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Lowest price we've seen: $19.99 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
Owners of DENSO oxygen sensors generally report the part fits and plugs in like the factory unit and clears the related check-engine code. Complaints center on wrong part numbers being ordered and on sensors that did not fix the underlying fault.
This is a DENSO oxygen sensor, part number 234-4437.
