Bosch 18006 Oxygen Sensor - Downstream

Bosch Oxygen Sensor for Mitsubishi Downstream Applications

Bosch Engineered Oxygen Sensor 18006 is a specific-fit, narrow-band heated oxygen sensor for downstream use on select Mitsubishi vehicles. It provides air-fuel-ratio feedback to the ECU for stable combustion control and emissions monitoring, with OE-style construction for consistent signal response.

Key Features

• Specific-fit Bosch oxygen sensor for downstream placement
• Narrow-band heated O2 sensor with 4-wire configuration
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Rectangle female connector with pin terminals
• Wiring harness included; harness length measures 32.9 in
• Metal housing and high-temperature-resistant construction for harsh underbody conditions
• Part number 18006 for easy identification

Product Line Details

Bosch Engineered Oxygen Sensor products draw on Bosch OE development in oxygen sensing technology, including narrowband designs that improve light-off speed and closed-loop response. This line focuses on accurate lambda measurement, heater control, and durable materials for dependable operation in demanding exhaust environments.

Detailed Description

Built for downstream exhaust monitoring, Bosch 18006 is a direct replacement oxygen sensor for 2007-2011 Mitsubishi Outlander, 2008-2011 Mitsubishi Lancer, and 2011 Mitsubishi Outlander Sport with California emission system coverage where noted. The sensor uses a heated narrow-band design to deliver precise feedback to the engine control unit, helping maintain proper fuel control after the secondary converter. Bosch 18006 is engineered for OE-style fit and signal performance in Mitsubishi emissions systems.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect air-fuel ratio readings after the secondary converter
• Slow sensor response during closed-loop operation
• Emissions test failures tied to oxygen sensor performance
• Rough fuel control caused by degraded sensor output

Installation Notes and Tips

Install in the downstream position after the secondary converter as specified by the vehicle application. Verify the 18 mm threaded bung, 4-wire connector layout, and harness routing before installation. Use the existing connector location and confirm the California emission system notes where applicable for Mitsubishi Lancer, Outlander, and Outlander Sport applications.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development in oxygen sensing technology. The sensor uses advanced ceramic elements, optimized heater control, and high-temperature-resistant materials to support consistent operation under thermal and vibration load.

• Fits 2007-2011 Mitsubishi Outlander, downstream
• Fits 2008-2011 Mitsubishi Lancer, downstream
• Fits 2011 Mitsubishi Outlander Sport, downstream
• Fits 2010 Mitsubishi Outlander, downstream