Bosch 17157 Oxygen Sensor - Upstream Right

Bosch Wideband O2 Sensor for Porsche Cayenne

Bosch 17157 is an Actual OE Oxygen Sensor built for precise air-fuel ratio monitoring in wideband applications. It fits 2003-2006 Porsche Cayenne, upstream right, and uses a heated, specific-fit design with a 5-wire harness for direct replacement service.

Key Features

• Wide band oxygen sensor for continuous air-fuel ratio measurement across the full lambda range
• Specific fit for 2003-2006 Porsche Cayenne, upstream right
• Heated sensor with optimized heater control for faster response
• 5-wire design with included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Oblong male connector with blade terminals
• Standard replacement grade from Bosch Actual OE Oxygen Sensor line

Detailed Description

Bosch 17157 is a wideband A/F oxygen sensor engineered to provide the ECU with detailed mixture feedback instead of the on-off style signal used by traditional switching sensors. That level of measurement supports accurate fuel control, stable engine operation, and lower emissions in the Porsche Cayenne platform. Bosch’s Actual OE Oxygen Sensor line reflects the company’s long OE development history and its role in introducing the planar pump-cell wideband design used in modern engine management systems.

This part cross-references Bosch 17157 for the same application and is also listed against 94860612802. For buyers searching Porsche Cayenne upstream right oxygen sensor, Bosch 17157, or 2003-2006 Porsche Cayenne wideband O2 sensor replacement, this part matches the confirmed fitment and sensor type.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings at the ECU
• Rough idle or drivability issues tied to mixture control
• Reduced fuel economy from inaccurate exhaust feedback
• Emissions test failures caused by a worn upstream sensor

Installation Notes and Tips

Fits 2003-2006 Porsche Cayenne, upstream right. Confirm the connector shape, terminal count, and 18 mm thread size before installation. The sensor is threaded and heated, with an included harness and a 55.1 in wiring harness length. Use the vehicle’s original routing path to keep the lead away from heat and moving components.

Quality Assurance

Bosch supplies OE-proven oxygen sensor technology backed by more than five decades of engine management development. The robust ceramic construction and fast light-off characteristics support reliable operation through thermal cycling and rapid load changes.