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The DENSO 234-4593 is a direct-fit oxygen sensor built to OE specifications for the vehicles it lists. It uses a zirconia sensing element with a heated circuit, so it reaches operating temperature quickly and the engine's fuel control goes closed-loop sooner after a cold start. It suits owners replacing a failed upstream sensor on a compatible vehicle who want factory-style fit and connector rather than a universal splice-in part. Against universal sensors it avoids wiring work; against cheaper generics it carries DENSO's OE-supplier reputation, though it costs more and is no upgrade over a healthy factory sensor.
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Lowest price we've seen: $31.59 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
Owners of compatible vehicles generally report the sensor fits and plugs in like the original and clears oxygen-sensor codes once installed. Complaints center on fitment confusion when the part number does not match the vehicle and on the higher cost than generic replacements.
This is an Oxygen Sensor of OE Type.
