Bosch 17238 Oxygen Sensor - Upstream

Bosch 17238 Oxygen Sensor Overview

Bosch 17238 is an Actual OE wideband oxygen sensor built for precise air-fuel ratio measurement in modern engine management systems. It uses a heated, specific-fit design with a 5-wire harness and 6 terminals for direct replacement service on select Jeep Wrangler and Ram 1500 applications.

Key Features

• Wideband A/F oxygen sensor for continuous lambda-range measurement
• Heated sensor with optimized heater control for faster response
• Specific-fit design with included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with robust ceramic sensor construction
• Oblong male connector, blade terminals, and 15.7 in wiring harness length

Product Details

As part of Bosch’s Actual OE Oxygen Sensor line, part number 17238 follows OE-style engineering for accurate feedback to the ECU. Bosch pioneered the wideband A/F oxygen sensor design, and this sensor reflects that development with fast light-off, stable heater performance, and detailed air-fuel monitoring across the full operating range. It is a direct-fit replacement for upstream positions on select 2014-2018 Ram 1500, 2019 Ram 1500 Classic, and 2020-2023 Jeep Wrangler and Ram 1500 models. This part cross-references Mopar 68171190AC for the same application.

Common Issues This Sensor Can Help Address

• Incorrect air-fuel ratio readings from a worn upstream sensor
• Delayed sensor response during cold starts
• Rough idle or drivability concerns tied to inaccurate exhaust feedback
• Reduced fuel economy caused by poor mixture control
• Higher emissions from degraded oxygen sensor performance

Installation Notes

Install Bosch 17238 in the upstream position only for the listed applications. Verify connector shape, terminal count, thread size, and harness length before installation. Use proper oxygen sensor service tools and follow the vehicle service procedure for torque and routing.

Quality Assurance

Bosch draws on more than five decades of OE sensor development, and this wideband oxygen sensor is built to OE-proven standards for accurate signal control and dependable operation under thermal cycling.