Bosch 13717 Oxygen Sensor - Downstream Left

Bosch Oxygen Sensor for Jeep Grand Cherokee

Bosch 13717 is a narrow-band heated oxygen sensor built for precise air-fuel ratio feedback to the ECU. It is a specific-fit replacement for 2001-2004 Jeep Grand Cherokee, downstream left applications, including the Bosch Engineered Oxygen Sensor line.

Key Features

• Specific-fit oxygen sensor for 2001-2004 Jeep Grand Cherokee, downstream left
• Narrow-band heated sensor for stable closed-loop fuel control
• 4-wire design with pin terminals and female connector
• Threaded mounting with 18 mm thread size and 22 mm hex
• Wiring harness included for direct replacement service
• Metal housing and high-temperature materials for underbody exhaust conditions

Product Details

Bosch 13717 uses Bosch’s OE-focused oxygen sensor engineering to deliver accurate switching-type signal output for the engine control unit. The sensor monitors exhaust oxygen content so the ECU can adjust fuel delivery, support steady combustion, and maintain emissions control during warm-up and normal driving. For Jeep Grand Cherokee owners servicing a downstream left sensor, this Bosch Engineered Oxygen Sensor provides a direct replacement format with the correct connector style, harness length, and threaded mount.

The Bosch Engineered Oxygen Sensor line builds on Bosch’s long history in oxygen sensing, including early thimble-style designs and later planar narrowband technology. That development focus is reflected in faster sensor response, improved lambda accuracy, and reliable heater performance under heat and vibration. Part number 13717 is also a practical search term for buyers looking for a Bosch 13717 oxygen sensor for Jeep Grand Cherokee 2001-2004 downstream left service.

This part cross-references Mopar (e.g., 56041345AE, 56044582AA) for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Rough or inconsistent closed-loop fuel control
• Emissions test failures tied to oxygen sensor faults
• Slow sensor response from an aging narrow-band O2 sensor

Installation Notes and Tips

Verify the downstream left location before installation on 2001-2004 Jeep Grand Cherokee models. Confirm the 4-wire connector, 18 mm thread size, and threaded mounting style match the original sensor. Inspect the exhaust bung threads and wiring routing before tightening the sensor to avoid connector strain or exhaust leaks.

Quality Assurance

Bosch supplies oxygen sensors with OE-proven engineering and durable materials developed for demanding exhaust temperatures and vibration exposure. Bosch 13717 is part of the Bosch Engineered Oxygen Sensor line, backed by more than five decades of oxygen sensor development for original equipment and aftermarket use.