Bosch 17477 Oxygen Sensor - Upstream Left

Bosch Wideband O2 Sensor for Porsche Cayenne

Bosch 17477 is an Actual OE wideband air-fuel oxygen sensor built for precise mixture feedback in modern engine management systems. It is a direct-fit, heated sensor for the upstream left position on select 2015-2018 Porsche Cayenne models, with OE-style connector and harness details for a clean replacement.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated design for faster sensor activity and stable operation
• Specific-fit replacement for the upstream left location
• 5-wire harness with included wiring harness
• Blade terminals, oblong connector, male connector and terminal ends
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with robust ceramic sensor construction

Detailed Description

Bosch 17477 is engineered for 2015-2018 Porsche Cayenne upstream left applications where accurate wideband oxygen sensing is required. As part of Bosch’s Actual OE Oxygen Sensor line, this sensor uses a wideband design to provide the ECU with detailed air-fuel ratio data across the full lambda range, helping the engine management system maintain precise control under changing load and temperature conditions. Bosch pioneered the planar pump-cell wideband design used in modern low-emission systems, and this replacement follows that OE development approach for consistent signal quality and reliable operation. This part cross-references Porsche OE number 958906262 for the same application.

Fits 2015-2018 Porsche Cayenne, upstream left. Bosch 17477 is a direct replacement choice for drivers searching for a Porsche Cayenne upstream left oxygen sensor, Bosch 17477 wideband O2 sensor, or OE-style air-fuel ratio sensor for 2015, 2016, 2017, and 2018 Cayenne models.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings at the upstream left position
• Rough idle or drivability issues tied to mixture control
• Reduced fuel economy from inaccurate sensor feedback
• Elevated emissions caused by delayed or unstable sensor response

Installation Notes and Tips

Verify the upstream left location before installation and confirm the connector shape, wire count, and thread size match the original sensor. Use the correct oxygen sensor socket for the 22 mm hex and 18 mm threaded mounting. Inspect the harness routing and connector lock before clearing fault codes and performing a relearn or readiness check if required by the vehicle.

Quality Assurance

Bosch has more than five decades of OE sensor development and supplies oxygen sensors to vehicle manufacturers and the aftermarket with OE-proven design standards. Bosch 17477 is built as a standard replacement for the specified Porsche Cayenne application.