Bosch 13783 Oxygen Sensor - Downstream or Upstream

Bosch Validated Oxygen Sensor 13783

Bosch Validated Oxygen Sensor 13783 is a narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management in specific Nissan and INFINITI applications, including downstream and upstream locations where listed.

Key Features

• Specific-fit oxygen sensor for direct application matching
• Narrow-band heated design for faster closed-loop operation
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• 3-wire configuration with blade terminals and rectangular male connector
• Wiring harness included with 17 in. harness length
• Metal housing with high-temperature-resistant construction
• Standard replacement grade for OE-style service work

Product Details

Bosch 13783 uses Bosch’s long-running oxygen sensor development experience, starting with the original thimble sensor and advancing to planar narrowband designs that improve light-off response and lambda accuracy. This Bosch Validated Oxygen Sensor is engineered for consistent signal output under heat and vibration, helping the ECU maintain the correct fuel mixture across changing operating conditions. It is a direct-fit replacement for select Nissan 200SX, Altima, Maxima, Sentra, and INFINITI I30 applications, including 1995-1997 Nissan 200SX downstream, 1996 INFINITI I30 downstream, and other listed positions.

This part cross-references 226A040U61 and 226A040U62 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings at the ECU
• Rough idle or unstable closed-loop fuel control
• Increased exhaust emissions from a worn sensor
• Delayed sensor response during warm-up and driving

Installation Notes

Verify the vehicle’s year, make, model, engine/emissions configuration, and sensor position before ordering. This Bosch oxygen sensor is threaded and uses a 3-wire harness with a male rectangular connector, so connector style and harness routing should be matched to the original part. Confirm downstream or upstream placement exactly as listed for your Nissan or INFINITI application, including California-emissions and build-date notes where shown.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience. The Bosch Validated Oxygen Sensor line is built to OE-proven standards for accuracy, durability, and consistent operation in aftermarket service.