Oxygen Sensor for 2004-2009 Toyota Prius - Bosch 15621

Bosch 15621 oxygen sensor for the 2004-2009 Toyota Prius 4-cylinder 1.5L measures oxygen in the exhaust and reports the air-fuel ratio to the ECU. This Bosch O2 sensor is a switching-type, narrow-band heated design for the downstream position.

• Switching-type narrow-band element with an integrated heater for steady air-fuel-ratio readings
• Reaches operating temperature in under 10 seconds for quick closed-loop control and cold-start response
• Metal housing and TSP coating resist vibration, corrosion and contamination
• Built to withstand exhaust streams up to 1,880°F

Quick facts

• Part: Bosch 15621 oxygen sensor
• Fits: 2004-2009 Toyota Prius 4-cylinder 1.5L
• Position: Downstream
• Material: Metal housing
• Condition: New

A check engine light, lower fuel economy or a rough idle can mean this sensor is worn, though the upstream oxygen sensor or the catalytic converter can sit behind them too, so find the cause before replacing it.

Fits

The 2004-2009 Toyota Prius 4-cylinder 1.5L takes one downstream sensor, and this listing is that one sensor.

Specifications

In the box

One oxygen sensor with its wiring harness. A mounting bracket and additional accessories are not included.

Installation notes

• Direct-fit connectors for quick installation.
• Conductive anti-seize is pre-applied to the threads.