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The DENSO 234-2003 is a downstream (post-catalyst) oxygen sensor built to OE specifications for a range of Toyota, Lexus and Scion vehicles. It uses a zirconia sensing element with a factory-style connector, so it plugs into the original harness without splicing. It suits owners chasing a check-engine light for catalyst efficiency or slow sensor response who want a fit that matches the original part. Compared with universal sensors, it costs more but avoids wire matching and crimping, and DENSO is a common OE supplier, which is why many owners pick it over generic brands.
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Lowest price we've seen: $46.45 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
Owners of Toyota-family vehicles generally report the DENSO 234-2003 fits like the original part and clears oxygen sensor codes after installation. Complaints center on seized old sensors and on codes that return when the real problem is the catalytic converter.
This is an OE type oxygen sensor.
