Bosch 18074 Oxygen Sensor - Downstream or Upstream

Bosch Validated Oxygen Sensor for Mitsubishi

Bosch Part Number 18074 is a specific-fit, narrow-band heated oxygen sensor for select Mitsubishi applications. It provides the ECU with air-fuel-ratio feedback needed for stable combustion control and emissions monitoring, including Mitsubishi Lancer, Outlander, Outlander Sport, Eclipse Cross, and RVR coverage in downstream and upstream positions where listed.

Key Features

• Bosch Validated Oxygen Sensor, Part Number 18074
• Narrow-band heated oxygen sensor with 4-wire configuration
• Specific-fit design with included wiring harness
• Threaded mounting with 18 mm thread size and 22 mm hex
• Rectangle female connector with pin terminals
• Metal housing and steel finish for underbody service conditions
• Wiring harness length: 34.1 in; overall length: 37.4 in
• Fits Mitsubishi Lancer, Outlander, Outlander Sport, Eclipse Cross, and RVR applications listed below

Product Details

Bosch 18074 is built as a standard replacement oxygen sensor for vehicles that rely on narrow-band feedback to manage fuel delivery and emissions performance. Bosch developed its oxygen sensor technology from early OE designs and later planar narrowband construction, focusing on faster sensor response, improved lambda accuracy, and quicker closed-loop operation. This sensor uses advanced ceramic elements, optimized heater control, and high-temperature-resistant materials to maintain consistent signal quality under heat and vibration. For Mitsubishi Lancer, Outlander, and Outlander Sport service work, Bosch Part Number 18074 provides a direct replacement option where the cataloged downstream or upstream position matches the vehicle listing.

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

What It Helps Address

• Check engine light related to oxygen sensor signal faults
• Rough idle or unstable air-fuel control from a worn sensor
• Reduced fuel economy caused by inaccurate exhaust feedback
• Emissions test failures tied to sensor response issues
• Delayed closed-loop operation after sensor aging or contamination

Installation Notes and Fitment

Compatible With select Mitsubishi applications in upstream and downstream positions. Confirm connector shape, 4-wire layout, threaded mounting, and sensor location before installation. This Bosch Validated Oxygen Sensor is listed for the following vehicles:

• Fits 2018-2020 Mitsubishi Eclipse Cross, downstream
• Fits 2019-2020 Mitsubishi Outlander, downstream
• Fits 2013 Mitsubishi Outlander, downstream
• Fits 2014-2018 Mitsubishi Outlander, downstream
• Fits 2011 Mitsubishi Outlander, downstream
• Fits 2008-2009 Mitsubishi Outlander, downstream
• Fits 2012-2018 Mitsubishi Outlander Sport, downstream
• Fits 2012-2017 Mitsubishi Lancer, downstream, located after primary converter
• Fits 2012-2017 Mitsubishi Lancer, downstream, located after secondary converter
• Fits 2008-2015 Mitsubishi Lancer, upstream
• Fits 2008-2015 Mitsubishi Lancer, downstream
• Fits 2014 Mitsubishi Lancer, downstream, without California Emission System
• Fits 2011 Mitsubishi Lancer, downstream, without California Emission System
• Fits 2014 Mitsubishi Lancer, downstream, with California Emission System
• Fits 2014 Mitsubishi Outlander Sport, upstream
• Fits 2012 Mitsubishi Outlander, upstream
• Fits 2008-2009 Mitsubishi Outlander, upstream
• Fits 2008-2011 Mitsubishi Lancer, downstream, located after primary converter, with California Emission System
• Fits 2011 Mitsubishi Outlander Sport, downstream, without California Emission System
• Fits 2011 Mitsubishi Outlander Sport, downstream, located after primary converter, with California Emission System
• Fits 2011 Mitsubishi RVR, downstream
• Fits 2008-2010 Mitsubishi Lancer, downstream, located after secondary converter, without California Emission System
• Fits 2008-2010 Mitsubishi Lancer, downstream, located after primary converter, without California Emission System
• Fits 2010 Mitsubishi Outlander, upstream, without California Emission System
• Fits 2010 Mitsubishi Outlander, downstream, without California Emission System
• Fits 2010 Mitsubishi Outlander, downstream, located after primary converter, with California Emission System

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience. The design reflects Bosch’s validated aftermarket approach, using OE-proven sensor architecture and durable materials for consistent operation in demanding exhaust environments.