Bosch 17353 Oxygen Sensor - Upstream or Upstream Right

Bosch Wideband OE Oxygen Sensor

Bosch Part Number 17353 is an actual OE wideband air-fuel oxygen sensor built for precise mixture feedback in modern engine management systems. It provides the ECU with continuous, high-resolution air-fuel ratio data for accurate control of fuel delivery, performance, and emissions.

Compatible With Audi S4, Audi A4 Quattro, Audi TT Quattro, Audi A4, Audi Allroad Quattro, Audi A6, Audi A6 Quattro, Bentley Continental, and Volkswagen Beetle applications listed below, this Bosch 17353 sensor is a specific-fit, heated replacement with a 5-wire harness and threaded mounting design.

Key Features

• Wideband A/F oxygen sensor for continuous lambda measurement
• Heated design for faster sensor warm-up and stable operation
• Specific-fit replacement with included wiring harness
• 5-wire configuration with 6 terminals and oblong male connector
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Steel-finish housing with robust ceramic sensor construction
• Overall length: 29.5 in; harness length: 26.2 in

Product Details

Bosch pioneered the wideband A/F oxygen sensor design used in modern engine control, and this part reflects that OE development background. The sensor delivers detailed air-fuel ratio information across the full lambda range, helping the ECU make precise adjustments during idle, cruise, acceleration, and load changes. Bosch 17353 is an Actual OE Oxygen Sensor for drivers who need direct-fit service on vehicles such as the Audi A4, Audi A6, and Audi S4, as well as select Bentley Continental and Volkswagen Beetle applications.

This part cross-references 1K0998262F and 07C906262Q for the same application.

What It Helps Address

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

Installation Notes and Tips

Install this sensor in the upstream position only where listed in the fitment data. Verify the connector shape, terminal count, thread size, and harness routing before installation. Because this is a specific-fit Bosch oxygen sensor, compare the original part number and connector style on the vehicle before replacement. Use proper oxygen sensor service tools to avoid damaging the threaded bung or sensor body.

• Fits 2004-2009 Audi S4, Upstream
• Fits 2002-2006 Audi A4 Quattro, Upstream
• Fits 2003-2006 Audi TT Quattro, Upstream
• Fits 2002-2005 Audi A4, Upstream
• Fits 2003-2005 Audi Allroad Quattro, Upstream
• Fits 2002-2004 Audi A6, Upstream
• Fits 2002-2004 Audi A6 Quattro, Upstream
• Fits 2003 Bentley Continental, Upstream Right
• Fits 1999-2001 Volkswagen Beetle, Upstream

Quality Assurance

Bosch supplies OE-level oxygen sensors backed by more than five decades of engine management development. Part Number 17353 is built to Bosch’s standard replacement specifications for accurate signal output, reliable heater performance, and long-term service in demanding exhaust conditions.