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The DENSO 234-4703 is a four-wire, heated, direct-fit oxygen sensor with a 50.39-inch lead. DENSO supplies sensors to automakers as original equipment, so this is built to the same spec as the factory part rather than a universal splice-in. Its laser-welded stainless housing and PTFE filter resist corrosion and contamination, and an aluminum oxide trap layer shields the ceramic element from silicone and lead. It suits owners replacing a failed upstream or downstream sensor on a compatible vehicle who want a plug-and-play fit instead of cutting and crimping wires.
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Lowest price we've seen: $19.88 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 sensor-related check-engine codes. Complaints center on fitment mistakes and seized old sensors rather than the part itself.
This is a DENSO heated oxygen sensor with 4 wires. It is a direct-fit replacement part, built for an exact fit. The wire length is 50.39.
The housing is laser-welded stainless steel, which resists corrosion. A PTFE filter blocks contaminants under harsh engine conditions. Dual-layer protection shields the ceramic element to support fast, reliable response times.
The sensor uses DENSO's aluminum oxide trap layer. This layer protects the ceramic element from silicone and lead poisoning. It is made and tested to OE standards.
