Bosch 13664 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Bosch Engineered Oxygen Sensor for Jeep and Dodge

Bosch Part Number 13664 is a specific-fit, narrow-band heated oxygen sensor for select Jeep and Dodge applications. It provides the air-fuel ratio feedback the ECU uses to manage closed-loop fuel control, combustion stability, and emissions performance.

Built for upstream locations on 2001-2004 Jeep TJ and Wrangler, 2001-2003 Dodge Dakota, Durango, Ram 1500, Ram 1500 Van, Ram 2500 Van, Ram 3500 Van, and select Ram 2500 and Ram 3500 models, this Bosch Engineered Oxygen Sensor is a direct replacement for the original sensor design used in these vehicles.

Key Features

• Narrow-band heated oxygen sensor for precise exhaust feedback
• Specific-fit design with 4-wire harness and rectangular female connector
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Wiring harness included for cleaner replacement on the correct application
• Metal housing and high-temperature-resistant construction for demanding exhaust conditions
• Upstream placement for select Jeep and Dodge engine management systems
• Bosch Part Number 13664 for OE-style replacement identification

Product Details

Bosch Engineered Oxygen Sensor line draws on Bosch OE development dating back to the original oxygen sensor designs introduced in 1976, including later planar narrowband technology used for faster light-off and quicker closed-loop operation. This sensor uses a heated narrow-band design with ceramic sensing elements and controlled heater operation to deliver stable signal output under changing load and temperature conditions. Bosch 13664 is a direct-fit replacement for select Jeep Wrangler, Jeep TJ, Jeep Grand Cherokee, Jeep Liberty, and Dodge Ram applications where accurate upstream oxygen sensor feedback is required.

This part cross-references Mopar 56041887AA and 56041944AA for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rough idle caused by inaccurate air-fuel ratio feedback
• Reduced fuel control accuracy during closed-loop operation
• Failed emissions inspection tied to sensor response issues
• Slow sensor switching or degraded exhaust signal output

Installation Notes

Install in the upstream sensor location specified for the vehicle and engine configuration. Confirm connector shape, wire count, thread size, and harness length before installation. This Bosch 13664 oxygen sensor is specific fit, so match the application by year, make, model, and position before replacement. Use proper oxygen sensor service tools to avoid damage to the threaded bung or sensor body.

Compatible With 2001-2004 Jeep TJ, upstream; 2001-2004 Jeep Wrangler, upstream; 2001-2003 Dodge Dakota, upstream; 2001-2003 Dodge Durango, upstream; 2001-2003 Dodge Ram 1500, upstream; and select 2002-2003 Jeep Grand Cherokee and Jeep Liberty upstream applications.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE sensor development and aftermarket supply experience. The Bosch Engineered Oxygen Sensor line is built to OE-proven standards for signal accuracy, heater control, and durability in high-heat exhaust environments.