Bosch 17330 Oxygen Sensor - Upstream

Bosch Wideband OE Oxygen Sensor

Bosch 17330 is a specific-fit wideband air-fuel oxygen sensor built for precise mixture feedback to the ECU. It uses a heated design, a 5-wire harness, and a threaded 18 mm mounting style for direct replacement service on select Audi applications.

As part of Bosch’s Actual OE Oxygen Sensor line, this sensor reflects Bosch’s long OE development history and the planar pump-cell wideband design used in modern engine management systems. The result is detailed air-fuel ratio measurement across the full lambda range for accurate control under changing load and temperature conditions.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated design for faster sensor operation after startup
• Specific-fit replacement with included wiring harness
• 5-wire configuration with blade terminals and oblong connector
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Metal housing with robust ceramic sensor construction
• Bosch part number 17330 for OE-style service replacement

Detailed Description

Bosch 17330 is engineered as an Actual OE Oxygen Sensor for vehicles that require a wideband upstream sensor. It provides high-precision feedback to the engine control unit, helping maintain accurate fuel delivery and stable combustion across a broad operating range. This Bosch wideband O2 sensor is a direct-fit solution for 2008-2012 Audi S5, upstream, and 2007 Audi S6, upstream, cylinder(s) 1, 2, and 3.

This part cross-references 07L906262K for the same application. If you are searching for a Bosch 17330 oxygen sensor for Audi S5 upstream or a Bosch 17330 oxygen sensor for Audi S6 upstream, this OE-style replacement is built to match the required sensor configuration and connector style.

What It Helps Address

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

Installation Notes and Tips

Verify connector shape, wire count, thread size, and upstream location before installation. This Bosch 17330 oxygen sensor uses a threaded 18 mm mount and includes the wiring harness, so the replacement should be matched carefully to the original sensor layout on the vehicle. Confirm fitment for 2008-2012 Audi S5 upstream and 2007 Audi S6 upstream before ordering.

Quality Assurance

Bosch developed the first wideband A/F oxygen sensor and continues to supply OE-proven sensor technology to the aftermarket. Bosch 17330 is part of the Actual OE Oxygen Sensor line, built to the same type of engineering standards used in modern engine management systems.