Bosch 15290 Oxygen Sensor - Downstream or Upstream

Bosch Oxygen Sensor for Toyota and Pontiac

Bosch Part Number 15290 is a specific-fit, narrow-band heated oxygen sensor for select Toyota Corolla, Toyota Matrix, and Pontiac Vibe applications. It provides direct air-fuel-ratio feedback to the ECU for stable closed-loop fuel control and emissions monitoring.

Key Features

• Bosch Engineered Oxygen Sensor line with OE-focused design
• Narrow-band heated oxygen sensor for faster closed-loop operation
• Specific fit with square female connector and 4-wire harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing built for high-temperature and vibration exposure
• Wiring harness included for direct replacement service

Product Details

Bosch 15290 uses advanced ceramic sensing elements and heater control to deliver accurate switching-type O2 signal output across changing exhaust temperatures. Bosch developed this sensor family from its original oxygen sensor designs and later planar narrowband technology, focusing on quicker light-off, improved lambda accuracy, and reliable closed-loop response. This Bosch Engineered Oxygen Sensor is a direct replacement for downstream and upstream positions on select 2003-2008 Toyota Corolla, 2003-2008 Toyota Matrix, and 2003-2008 Pontiac Vibe applications, with fitment varying by year and position. This part cross-references 8946501100 and 8946501110 for the same application.

Common Problems This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Unstable air-fuel ratio feedback to the ECU
• Delayed closed-loop fuel control after startup
• Emissions test failure caused by a worn O2 sensor
• Rough combustion control from inaccurate exhaust oxygen readings

Installation Notes and Tips

Verify the exact year, model, and sensor position before ordering. Fits 2003-2008 Pontiac Vibe, downstream; Fits 2003-2006 Pontiac Vibe, upstream; Fits 2003-2008 Toyota Corolla, downstream; Fits 2005-2006 Toyota Corolla, upstream; Fits 2003-2008 Toyota Matrix, downstream; Fits 2003-2006 Toyota Matrix, upstream; Fits 2004 Toyota Matrix, downstream, from 05/2004; Fits 2003 Toyota Matrix, downstream, to 04/2003. Confirm the 4-wire square connector, 18 mm thread size, and threaded mounting style match the original sensor before installation.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development, and this Bosch Engineered Oxygen Sensor reflects that experience with OE-proven materials, heater control, and sensor construction for demanding exhaust conditions.