DENSO DOX-0644

Oxygen Sensor (Switching-type / Heated)

Technical Data

Product Information

Switching-type Oxygen Sensor by DENSO is a high-precision emissions control component designed to measure the oxygen content in the exhaust manifold. By constantly "switching" and sending voltage signals to the Engine Control Unit (ECU), it helps maintain the perfect air-fuel mixture for efficient combustion. This heated, finger-type sensor features premium DENSO quality materials to ensure rapid warm-up times, extended durability against extreme exhaust temperatures, and reduced emissions. It is an exact OE replacement for a wide range of Toyota vehicles.

• ✔ Built to original equipment (OE) standards for guaranteed fit, form, and function.
• ✔ Features a pre-greased M18x1.5 thread to prevent galling and ensure a smooth, hassle-free installation.
• ✔ 415 mm insulated cable with a 4-terminal connector designed for direct plug-and-play fitment without splicing.

Cross Reference

Fully interchangeable with OEM/OE parts:

⚠ Diagnostic & Installation Tip ⚠

Before replacing this sensor:

• The threads on the DENSO DOX-0644 are pre-greased at the factory. Do not apply any additional anti-seize compound, as it may contaminate the sensor tip and cause immediate failure.
• Ensure the engine and exhaust system are completely cool to avoid severe burns and to prevent stripping the exhaust manifold threads during removal.
• Route the 415 mm cable carefully using original mounting clips to ensure the wiring does not contact hot exhaust components or moving parts.

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