Bosch 13489 Oxygen Sensor - Downstream

Bosch Engineered Oxygen Sensor 13489

Bosch Engineered Oxygen Sensor 13489 is a narrow-band heated downstream O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management across changing operating conditions, making it a direct replacement choice for select Toyota, Lexus, Chevrolet, and Geo applications.

Key Features

• Specific-fit oxygen sensor for direct application matching
• Narrow-band heated sensor design for faster closed-loop operation
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• 4-wire configuration with blade terminals and rectangular male connector
• Wiring harness included with 25.2 in harness length
• Metal housing and high-temperature-resistant construction for demanding exhaust conditions
• Downstream placement for emissions monitoring after the catalytic converter

Product Details

Part number 13489 is part of the Bosch Engineered Oxygen Sensor line, which reflects Bosch’s long OE development history in oxygen sensing technology. Bosch moved from early thimble-style sensors to planar narrowband designs that improve light-off response, lambda accuracy, and closed-loop switching speed. This sensor uses a heated narrow-band design with optimized heater control and ceramic sensing elements to maintain consistent signal output under heat and vibration.

Compatible With 1995-2002 Toyota Corolla, downstream; 2000-2001 Toyota Camry, downstream; 1995-2000 Lexus LS400, downstream; 1995-1997 Toyota Avalon, downstream; 1998-2002 Chevrolet Prizm, downstream; and 1995-1997 Geo Prizm, downstream. This part cross-references 8946533210 and 8946550070 for the same application. Bosch 13489 is a practical OE-style replacement for drivers searching for a downstream oxygen sensor for Toyota Corolla, Toyota Camry, or Lexus LS400 service.

What This Sensor Helps Address

• Check engine light concerns related to downstream oxygen sensor performance
• Slow or inaccurate exhaust oxygen signal feedback
• Rough combustion control caused by aging sensor response
• Emissions test failures tied to sensor degradation
• Driveability issues from delayed closed-loop switching

Installation Notes and Tips

Verify the connector shape, wire count, thread size, and downstream location before installation. This sensor uses a threaded mount with a 18 mm thread size and a 4-wire harness, so matching the original connector and harness routing is important for proper fitment. Inspect the exhaust bung and wiring path for corrosion, heat damage, or thread contamination before installing Bosch 13489.

Quality Assurance

Bosch supplies oxygen sensors with OE-level engineering focus, using durable materials, ceramic sensing elements, and heater control strategies developed from decades of original equipment experience. The Bosch Engineered Oxygen Sensor line is built to deliver consistent signal accuracy and long service life under harsh thermal and vibration loads.