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The DENSO 234-4253 is a direct-fit oxygen sensor for specific Toyota, Lexus and Scion applications. It is an OEM-style replacement: DENSO supplies these sensors to several automakers, so the connector and wire length match the factory part. It suits owners chasing a check-engine light for an O2 sensor code who want a plug-and-play fit rather than a universal splice-in sensor. Compared with generic universal sensors, it costs more but needs no wiring work; compared with dealer parts, it is the same type of part from the same supplier.
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Owners who fit this sensor typically report the check-engine light clearing and fuel trims returning to normal. Most praise the factory-style connector and fit. Complaints center on price versus universal sensors and on buyers who received the wrong part for their vehicle.
This is the DENSO Oxygen Sensor, part number 234-4253.
