Bosch 15748 Oxygen Sensor - Downstream Right or Upstream Right

Bosch Wideband O2 Sensor for OE Replacement

Bosch 15748 is an OE Quality Oxygen Sensor built for precise air-fuel ratio monitoring in modern engine management systems. This wide-band sensor provides continuous measurement across the full lambda range, helping the ECU maintain accurate mixture control in changing load and temperature conditions.

Compatible with 2018-2025 Jeep Wrangler upstream right and 2022-2025 Ram ProMaster 1500, ProMaster 2500, and ProMaster 3500 downstream right applications, Bosch 15748 supports direct-fit replacement needs for vehicles that rely on fast, stable oxygen sensing.

Key Features

• Wide-band sensor design for continuous air-fuel ratio measurement
• Heated sensor with optimized heater control for faster light-off
• Specific-fit replacement with 4-wire configuration
• Oblong female connector with pin terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing and robust ceramic construction for thermal durability
• 19.4 in wiring harness length and 21.7 in sealing surface to connector length

Product Details

Bosch 15748 uses wide-band oxygen sensing technology to deliver detailed feedback to the engine control unit, improving mixture control compared with traditional switching sensors. Bosch pioneered the planar pump-cell wideband design, and this OE Quality Oxygen Sensor reflects that development history with a focus on accuracy, response speed, and durability. It is a standard replacement part for Jeep Wrangler and Ram ProMaster applications where precise upstream or downstream right sensor performance is required.

This part cross-references Mopar 68291423AB for the same application.

What It Helps Address

• Check engine lights related to oxygen sensor performance
• Incorrect air-fuel ratio readings
• Rough idle or inconsistent engine response caused by faulty sensor feedback
• Reduced fuel economy from inaccurate mixture control
• Higher emissions from degraded exhaust monitoring

Installation Notes

Verify the sensor position before installation: this part is listed for upstream right on 2018-2025 Jeep Wrangler and downstream right on 2022-2025 Ram ProMaster 1500, ProMaster 2500, and ProMaster 3500. Confirm connector shape, terminal count, thread size, and harness length against the original sensor before replacement. Use proper oxygen sensor service tools and follow factory torque specifications for threaded installation.

Quality Assurance

Bosch supplies OE-proven oxygen sensor technology backed by more than five decades of original equipment development. Part number 15748 is built to the same quality standards trusted by vehicle manufacturers for accurate sensor feedback and reliable operation.