Bosch 13622 Oxygen Sensor - Downstream

Bosch Validated Oxygen Sensor for Toyota Celica

Bosch 13622 is a specific-fit, narrow-band heated oxygen sensor for the downstream position on select 2000-2002 Toyota Celica models. It provides accurate air-fuel-ratio feedback to the ECU to support stable closed-loop fuel control and lower emissions.

Built with Bosch Validated Oxygen Sensor engineering, this replacement uses a threaded metal housing, a 4-wire harness, and a rectangular male connector for direct service replacement on the Toyota Celica downstream application.

Key Features

• Fits 2000-2002 Toyota Celica, downstream
• Bosch Validated Oxygen Sensor line for OE-style replacement
• Narrow-band heated oxygen sensor design
• 4-wire configuration with included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Rectangle connector, male terminal and connector ends
• Standard replacement grade for emission control service
• Bosch 13622 part number for catalog and cross-reference lookup

Product Details

Bosch 13622 is engineered for vehicles that rely on a switching-type O2 sensor to monitor exhaust oxygen content and relay that information to the engine control unit. On the 2000-2002 Toyota Celica, downstream sensor performance is important for maintaining proper emissions monitoring and consistent fuel management. Bosch’s oxygen sensor program builds on decades of OE development, including early thimble-style sensors and later planar narrowband designs that improved warm-up response, lambda accuracy, and closed-loop operation. Bosch 13622 continues that approach with durable ceramic sensing elements, optimized heater control, and high-temperature materials for demanding exhaust conditions.

This part cross-references 8946520680 for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect oxygen sensor signal to the ECU
• Emissions test failures tied to sensor performance
• Rough or unstable fuel control caused by a worn O2 sensor
• Slow sensor response during closed-loop operation

Installation Notes and Tips

Confirm the downstream location before installation and verify connector shape, wire count, and thread size against the original sensor. The threaded 18 mm sensor body and 22 mm hex size are important for proper removal and tightening. Inspect the harness routing and connector condition before plugging in Bosch 13622, and clear diagnostic trouble codes after installation if required by the vehicle service procedure.

Quality Assurance

Bosch backs this oxygen sensor line with more than five decades of OE development and aftermarket supply experience. The Bosch Validated Oxygen Sensor program is built around OE-proven design principles for accurate signal output, reliable heater performance, and durable operation in high-heat exhaust environments.