Bosch 13483 Oxygen Sensor - Downstream

Bosch Oxygen Sensor for Downstream Control

Bosch Engineered Oxygen Sensor 13483 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management in downstream applications across the listed Chevrolet, Pontiac, and Oldsmobile vehicles.

Key Features

• Specific-fit oxygen sensor for direct application matching
• Narrow-band heated design for faster closed-loop operation
• 4-wire configuration with square connector and pin terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Steel-finish metal housing for high-temperature and vibration resistance
• Wiring harness included with 53.2 in harness length
• Overall length: 56.9 in; sealing surface to connector end: 55.7 in

Product Details

Bosch 13483 uses advanced ceramic sensing elements and optimized heater control to deliver consistent signal response under demanding exhaust conditions. As part of the Bosch Engineered Oxygen Sensor line, it reflects Bosch’s long OE development history in oxygen sensing technology, including narrowband planar designs that improve light-off speed and closed-loop transition timing. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle Fitment

• Fits 1998-2001 Chevrolet Cavalier, Downstream
• Fits 1997-2003 Chevrolet Corvette, Downstream
• Fits 1997-2003 Chevrolet Malibu, Downstream
• Fits 1999 Chevrolet Malibu, Downstream, RPO Code RC9
• Fits 1999-2004 Oldsmobile Alero, Downstream
• Fits 1997-1999 Oldsmobile Cutlass, Downstream
• Fits 1998-2001 Pontiac Sunfire, Downstream
• Fits 1999-2004 Pontiac Grand Am, Downstream
• Fits 1999 Pontiac Grand Am, Downstream, RPO Code RC9

What It Helps Address

• Erratic oxygen sensor readings that affect fuel trim control
• Delayed closed-loop operation after exhaust heat-up
• Check engine light concerns related to downstream O2 sensor performance
• Rough combustion control caused by inaccurate air-fuel feedback
• Emissions test failures tied to a worn or slow-responding sensor

Installation Notes

Verify the downstream sensor location, connector shape, wire count, and thread size before installation. Use the existing harness routing and confirm the 18 mm threaded mounting point matches the original sensor. For 1999 Chevrolet Malibu and 1999 Pontiac Grand Am applications, confirm the RPO Code RC9 note before ordering.

Quality Assurance

Bosch backs this oxygen sensor with OE-level engineering developed over decades of original-equipment sensor production. The Bosch Engineered Oxygen Sensor 13483 is built to deliver consistent signal accuracy and durable operation in harsh exhaust environments.