Bosch 17305 Oxygen Sensor - Upstream

Bosch Wideband OE Oxygen Sensor

Bosch 17305 is a heated wideband air-fuel oxygen sensor built for precise mixture feedback and stable engine management. It delivers continuous lambda measurement across the full range, helping the ECU maintain accurate control during idle, acceleration, and load changes. This Bosch Actual OE Oxygen Sensor is a direct-fit replacement for select Volkswagen applications, including Beetle and Jetta upstream positions.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated design for faster sensor warm-up and quicker closed-loop operation
• Specific-fit replacement with a 5-wire harness and included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Oblong male connector with blade terminals for OE-style connection
• Robust metal housing and ceramic sensor construction for thermal durability
• Fits 2012-2013 Volkswagen Beetle, upstream
• Fits 2012-2013 Volkswagen Jetta, upstream

Product Details

Bosch Actual OE Oxygen Sensor 17305 uses wideband sensing technology to provide the ECU with detailed air-fuel data instead of simple switch-style output. That makes it a strong OE replacement choice for 2012-2013 Volkswagen Beetle upstream and 2012-2013 Volkswagen Jetta upstream applications. Bosch pioneered the planar pump-cell wideband design used in modern engine management, and this sensor reflects that OE development with fast light-off, controlled heater performance, and reliable operation through repeated heat cycles.

This part cross-references 06J906262AC for the same application.

Common Problems This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn upstream sensor
• Rough idle or hesitation caused by poor mixture feedback
• Reduced fuel economy from inaccurate ECU fuel control
• Higher emissions from delayed or unstable sensor response

Installation Notes

Verify the upstream location and connector style before installation. This sensor uses an 18 mm thread size, threaded mounting, and a 24.4 in wire length with a 23.6 in sealing-surface-to-connector length. Confirm harness routing, connector orientation, and exhaust thread condition during replacement to ensure a proper OE-style installation on Volkswagen Beetle and Volkswagen Jetta models.

Quality Assurance

Bosch supplies OE-developed oxygen sensor technology to the aftermarket, drawing on more than five decades of engine management experience. Part number 17305 is built to Bosch’s standard replacement specifications for accurate signal output and dependable service in emission control applications.