Bosch 15439 Oxygen Sensor - Upstream

Bosch Validated Oxygen Sensor for Chrysler and Dodge

Bosch Validated Oxygen Sensor 15439 is a narrow-band heated upstream O2 sensor built for precise air-fuel ratio feedback to the ECU. It is a specific-fit replacement for 2001-2002 Chrysler Sebring and 2001-2002 Dodge Stratus applications, helping maintain stable combustion control and emissions performance.

Key Features

• Specific-fit Bosch Validated 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
• 4-wire configuration with square female connector
• Wiring harness included with 14.5 in harness length
• Metal housing and high-temperature-resistant construction for demanding exhaust conditions
• Fits upstream sensor locations on select Chrysler Sebring and Dodge Stratus models

Product Details

Bosch part number 15439 uses advanced ceramic sensing elements and optimized heater control to deliver consistent oxygen-content readings under changing load and temperature conditions. As part of the Bosch Validated Oxygen Sensor line, this replacement follows Bosch OE development experience and is built for accurate signal response in narrow-band engine management systems. It is a direct replacement choice for drivers searching for a 2001-2002 Chrysler Sebring upstream oxygen sensor or a 2001-2002 Dodge Stratus upstream O2 sensor. Cross-reference: this part cross-references 4606555AB for the same application.

What It Helps Address

• Check engine light caused by a slow or inaccurate upstream O2 sensor
• Rough idle or unstable air-fuel control
• Reduced fuel economy from incorrect exhaust feedback
• Emissions test failure related to oxygen sensor performance
• Delayed closed-loop operation after startup

Installation Notes and Tips

Install Bosch 15439 in the upstream threaded sensor location only. Verify the 4-pin square connector, 18 mm thread size, and harness routing before installation. Use proper oxygen sensor service tools and inspect the exhaust bung threads for damage or contamination before tightening the sensor to specification.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development behind this replacement line. The Validated Oxygen Sensor series is built to Bosch standards for accurate signal output, durable heater performance, and consistent operation in high-heat, high-vibration exhaust environments.