Bosch 17357 Oxygen Sensor - Upstream or Upstream Left

Overview of Bosch Actual OE Oxygen Sensor 17357

The Bosch Actual OE Oxygen Sensor 17357 is designed specifically for select Audi and Volkswagen models, including the A8 Quattro, Passat, and Touareg. This wide-band oxygen sensor features a heated design and a 26.2-inch wiring harness, ensuring accurate emissions control and optimal engine performance.

• Heated wide-band oxygen sensor for precise air-fuel ratio monitoring
• Specific fit for Audi A8 Quattro, Volkswagen Passat, and Touareg
• 26.2-inch wiring harness with oblong male connector
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Standard replacement grade with metal housing and steel finish
• Includes wiring harness with 5 wires and 6 terminals (male blade type)

Details on Bosch Actual OE Oxygen Sensor Product Line

The Actual OE Oxygen Sensor line by Bosch is engineered to meet original equipment specifications, providing reliable emissions control components for European vehicles. This product line focuses on delivering sensors that match factory fit and function, making the 17357 sensor a direct replacement for compatible Audi and Volkswagen models. Its heated wide-band design supports accurate exhaust gas measurement, essential for maintaining engine efficiency and emissions compliance.

Technical Description and Features

The Bosch 17357 oxygen sensor is a heated, wide-band sensor constructed with a durable metal housing and steel finish to withstand harsh engine environments. It features a 26.2-inch wiring harness with an oblong male connector and blade-type terminals, designed for a specific fit rather than universal application. The sensor mounts via a threaded connection with an 18 mm diameter and 22 mm hex size, facilitating straightforward installation. With five wires and six terminals, this sensor provides precise signal transmission to the engine control unit (ECU).

Applications and Common Issues Addressed

• Restores accurate air-fuel ratio readings for Audi A8 Quattro, Volkswagen Passat, and Touareg
• Resolves engine performance problems related to faulty oxygen sensors
• Helps reduce emissions and prevent check engine light triggers
• Improves fuel efficiency by ensuring proper combustion control
• Eliminates rough idling and hesitation caused by sensor failure

Installation Notes and Tips

When installing the Bosch Actual OE Oxygen Sensor 17357, ensure the vehicle is compatible with this specific part number. Use a 22 mm oxygen sensor socket for removal and installation. The threaded mounting type requires careful torque application to avoid damage. Verify the wiring harness length and connector shape match the vehicle’s factory setup. No mounting bracket is included, so use the existing mounting point on the exhaust system.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet stringent quality standards, ensuring durability and reliable performance. The Actual OE Oxygen Sensor 17357 is a standard replacement grade part designed to meet OEM specifications. While specific warranty details are not provided here, Bosch typically offers limited warranties on their emission control components. Refer to Bosch or vehicle manufacturer documentation for exact warranty coverage.