Bosch 17363 Oxygen Sensor - Upstream

Bosch Wideband OE Oxygen Sensor

Bosch 17363 is an Actual OE Oxygen Sensor built as a wideband air-fuel sensor for precise upstream mixture monitoring. It provides continuous lambda measurement for accurate ECU control, helping maintain stable fuel delivery and emissions performance on supported Audi applications.

Compatible With 2005-2015 Audi A6 Quattro, A8 Quattro, RS4, S8, and R8 upstream positions listed below. Bosch 17363 is a direct-fit, specific application sensor with a heated design, integrated wiring harness, and OE-style connector layout.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated sensor design for faster operating temperature
• Specific-fit replacement with integrated wiring harness
• 5-wire sensor design with 6 terminals and oblong male connector
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Robust metal housing and ceramic sensor construction
• Actual OE Oxygen Sensor line from Bosch

Product Details

Bosch’s Actual OE Oxygen Sensor line focuses on OE-level fit, signal accuracy, and durability for modern engine management systems. Part number 17363 uses wideband sensor technology to deliver detailed upstream feedback across the full lambda range, which is especially important on vehicles that rely on precise fuel control under changing load and temperature conditions. This Bosch 17363 sensor is a strong match for Audi performance and luxury platforms that require accurate air-fuel monitoring, including Audi R8, Audi A6 Quattro, Audi A8 Quattro, Audi RS4, and Audi S8 applications.

This part cross-references 1K0998262AA for the same application.

Common Issues This Sensor Can Address

• Fault codes related to upstream oxygen sensor performance
• Rough idle or inconsistent air-fuel mixture readings
• Reduced fuel economy caused by inaccurate sensor feedback
• Emissions test failures tied to sensor response issues
• Delayed or unstable closed-loop fuel control

Installation Notes

Install Bosch 17363 in the upstream threaded sensor location specified for the vehicle. Verify connector shape, terminal count, harness length, and thread size before installation. Because this is a wideband sensor, correct placement and secure electrical connection are important for accurate ECU readings. Always confirm the exact Audi fitment by year, model, engine configuration, and cylinder-bank notes before ordering.

• Fits 2014-2015 Audi R8, Upstream, Cylinder(s) 5 to 8; Actual OE Oxygen Sensor
• Fits 2008-2012 Audi R8, Upstream, Cylinder(s) 5 to 8; Actual OE Oxygen Sensor
• Fits 2005-2011 Audi A6 Quattro, Upstream; Actual OE Oxygen Sensor
• Fits 2007-2010 Audi A8 Quattro, Upstream; Actual OE Oxygen Sensor
• Fits 2007-2008 Audi RS4, Upstream; Actual OE Oxygen Sensor
• Fits 2007 Audi A8 Quattro, Upstream, From Chassis # 4E-7-017 001; Actual OE Oxygen Sensor
• Fits 2007 Audi S8, Upstream, Cylinder(s) 4 and 5; Actual OE Oxygen Sensor
• Fits 2007 Audi S8, Upstream, Cylinder(s) 6 to 8; Actual OE Oxygen Sensor
• Fits 2007 Audi S8, Upstream, Cylinder(s) 1, 2, and 3; Actual OE Oxygen Sensor
• Fits 2007 Audi S8, Upstream, Cylinder(s) 9 and 10; Actual OE Oxygen Sensor

Quality Assurance

Bosch has more than five decades of OE development behind its oxygen sensor program, and the 17363 reflects that experience with OE-proven sensor architecture, fast light-off behavior, and durable construction for demanding engine environments.