Bosch 18108 Oxygen Sensor - Downstream or Downstream Left

Reliable Oxygen Sensor for Audi A6, A6 Quattro, and Q7

The Bosch Engineered Oxygen Sensor 18108 is designed specifically for select Audi models, including the A6, A6 Quattro, and Q7. This narrow-band heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine management system.

• Specific fit for Audi A6, A6 Quattro, and Q7 models
• Heated narrow-band oxygen sensor for improved response time
• 42-inch wiring harness length with 4 wires and blade terminals
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Durable metal housing finished in steel for long-lasting use
• Oblong male connector with 4 terminals included
• Standard replacement grade for reliable emissions control

About the Bosch Engineered Oxygen Sensor Line

The Bosch Engineered Oxygen Sensor line focuses on delivering precise and reliable sensor technology tailored to specific vehicle applications. The 18108 oxygen sensor is part of this line, engineered to meet OEM specifications for fit, function, and durability. This ensures consistent performance in emission control systems for Audi vehicles, maintaining compliance with environmental standards.

Product Details and Specifications

This Bosch oxygen sensor features a narrow-band heated sensor type, which allows for faster warm-up times and accurate oxygen level readings. The sensor includes a 42-inch wiring harness with four wires and blade terminals, facilitating a secure electrical connection. The sensor’s mounting is threaded with an 18 mm diameter and a 22 mm hex size for installation using standard tools. The metal housing finished in steel provides durability against heat and corrosion. The oblong male connector with four terminals ensures compatibility with the vehicle’s wiring harness. Overall, the sensor measures approximately 45.7 inches in length, including the wiring harness.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for Audi A6, A6 Quattro, and Q7
• Helps resolve check engine light triggers related to oxygen sensor faults
• Improves fuel efficiency by providing precise emissions data
• Reduces harmful exhaust emissions by maintaining proper combustion
• Prevents engine performance issues caused by faulty oxygen sensors

Installation Notes and Tips

When installing the Bosch Engineered Oxygen Sensor 18108, ensure the vehicle is cooled down to avoid burns. Use a 22 mm oxygen sensor socket or wrench for removal and installation. Verify the sensor’s threaded size matches the vehicle’s mounting port (18 mm). Handle the wiring harness carefully to avoid damage to the connector or wires. Since this sensor is a specific fit for Audi A6, A6 Quattro, and Q7 models, confirm compatibility with your vehicle’s year and engine type before installation.

Quality Assurance and Warranty

Bosch Engineered Oxygen Sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. This part is a standard replacement grade sensor 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 your parts provider for exact warranty terms.