Bosch 18026 Oxygen Sensor - Downstream

Overview of Bosch Validated Oxygen Sensor 18026

The Bosch Validated Oxygen Sensor 18026 is designed specifically for select Audi models, including the A4 Quattro, A5 Quattro, Q5, S4, S5, and SQ5. This narrow-band heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases precisely.

• Specific fit for Audi A4 Quattro, A5 Quattro, Q5, S4, S5, and SQ5
• Heated narrow-band oxygen sensor for reliable emissions monitoring
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• 17.4-inch wiring harness length with 4-wire blade terminals and oblong male connector
• Durable metal housing with steel finish and overall length of 20.9 inches
• Standard replacement grade with included wiring harness

Detailed Product Description

The Bosch Validated Oxygen Sensor 18026 is engineered to meet the specific requirements of various Audi models, providing precise air-fuel mixture readings to the engine control unit. Featuring a heated narrow-band sensor type, it quickly reaches operating temperature for accurate emissions feedback. The sensor includes a 17.4-inch wiring harness with four blade terminals and an oblong male connector, ensuring secure and proper electrical connections. Its threaded mounting type with an 18 mm diameter and 22 mm hex size allows for straightforward installation. Constructed with a metal housing and steel finish, this sensor offers durability and resistance to harsh engine conditions. The overall length of 20.9 inches and a wire length of 19.7 inches from sealing surface to connector end provide ample reach for proper fitment.

Compatible Vehicles and Applications

• Designed for Audi A4 Quattro models requiring a narrow-band heated oxygen sensor
• Compatible with Audi A5 Quattro for emissions control system maintenance
• Fits Audi Q5 models needing a specific replacement oxygen sensor
• Suitable for Audi S4, S5, and SQ5 models to maintain optimal engine performance

Installation Notes and Tips

• Ensure the sensor thread size (18 mm) matches the vehicle’s exhaust port
• Use a 22 mm hex socket for proper sensor removal and installation
• Verify connector type and wiring harness length for compatibility with vehicle wiring
• Handle the sensor carefully to avoid damage to the heated element and wiring

Quality Assurance and Warranty

The Bosch Validated Oxygen Sensor 18026 is manufactured to meet OEM specifications, ensuring reliable performance and durability. Bosch’s validated product line undergoes rigorous testing to confirm fit, form, and function for the specified Audi models. This sensor is a standard replacement grade part designed to maintain emissions compliance and engine efficiency. Warranty details should be confirmed with the point of purchase or Bosch directly.