Bosch 13039 Oxygen Sensor - Upstream

Bosch OE Oxygen Sensor for Nissan and INFINITI

Bosch 13039 is a specific-fit, narrow-band heated oxygen sensor built for upstream applications on select Nissan and INFINITI vehicles. It measures exhaust oxygen content and sends precise air-fuel-ratio data to the ECU to support stable combustion control and lower emissions.

As part of Bosch’s Actual OE Oxygen Sensor line, this sensor reflects Bosch’s long OE development history and uses advanced ceramic elements, optimized heater control, and high-temperature-resistant materials for consistent operation in demanding thermal and vibration conditions.

Key Features

• Specific-fit Bosch oxygen sensor for upstream placement
• Narrow-band heated design for faster closed-loop operation
• Blade terminal type with 3-wire harness and oblong connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Steel finish with metal housing for durability in exhaust service
• Wiring harness included for direct replacement service
• Part number 13039 for accurate ordering and lookup

Detailed Description

Bosch 13039 is engineered as a standard replacement oxygen sensor for vehicles that use an upstream narrow-band heated sensor. It is listed for 1995-1997 Nissan 200SX, 1991-1996 INFINITI G20, 1991-1994 Nissan Sentra, and 1991-1993 Nissan NX. This part cross-references 2269064Y12 for the same application. Bosch 13039 helps the engine control system monitor exhaust oxygen levels so fuel delivery can stay within the proper range during normal driving, warm-up, and closed-loop operation.

What This Sensor Helps Address

• Check engine light concerns related to oxygen sensor performance
• Rich or lean fuel mixture readings at the ECU
• Slow closed-loop response after engine warm-up
• Emissions test failures tied to upstream sensor output
• Rough idle or drivability issues caused by inaccurate air-fuel feedback

Installation Notes and Tips

Verify the connector style, wire count, thread size, and upstream location before installation. The sensor uses a threaded mount with an 18 mm thread diameter and a 22 mm hex size, so the correct oxygen sensor socket or wrench is recommended. Confirm the harness routing and connector orientation on the vehicle before final tightening.

Quality Assurance

Bosch supplies this Actual OE Oxygen Sensor line with OE-proven design and materials developed from decades of oxygen sensor engineering. Bosch 13039 is built to deliver consistent signal accuracy and dependable service in exhaust environments.