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The DENSO 234-4061 is a 4-wire heated oxygen sensor that reads exhaust oxygen so the engine computer can hold the right air-fuel mix. It is a direct-fit part with a 14.17-inch lead, so it plugs into the factory connector without splicing. DENSO supplies sensors to many automakers, and this one is built to the same spec as the original. It suits owners replacing a failed upstream sensor on a compatible vehicle; check fitment by part number before buying, since rivals often cost less but may need wire splicing.
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Lowest price we've seen: $13.70 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 original and clears the check-engine light. Some say it costs more than universal sensors, and a few had fitment trouble after ordering by vehicle rather than part number.
It is a heated sensor with a 4-wire connection.
