Standard Ignition S3171 Oxygen Sensor Connector

Oxygen Sensor Connector for Toyota, Lexus, Pontiac, and Mitsubishi

Standard Ignition S3171 is a female oxygen sensor connector built for downstream sensor service on select Toyota, Lexus, Pontiac, and Mitsubishi applications. It uses a square connector housing with a 4-blade male terminal layout and 18-gauge wiring for direct electrical repair work.

Key Features

• Female oxygen sensor connector with square housing
• 4 terminal blade design with 4-wire configuration
• 18-gauge harness construction
• 450 mm harness length for routing flexibility
• 0-degree bend angle
• Fits downstream sensor applications on select Corolla, Matrix, SC430, Vibe, and Outlander models

Detailed Description

Standard Ignition S3171 is an oxygen sensor connector for downstream sensor circuits where the original connector is damaged, heat affected, or no longer making a secure electrical connection. The 1 1/2-inch housing length and square connector shape support a clean repair at the sensor harness interface. This part cross-references EC3196 and PT3946 for the same application. Standard Ignition S3171 is listed for 2003-2009 Toyota Corolla, 2011-2013 Toyota Corolla, 2003-2008 Toyota Matrix, 2010-2013 Toyota Matrix, 2006-2010 Lexus SC430, 2003-2008 Pontiac Vibe, and 2003-2006 Mitsubishi Outlander downstream sensor locations.

What It Helps Repair

• Broken or cracked oxygen sensor connector housings
• Intermittent downstream O2 sensor signal loss
• Corrosion at the sensor connector terminals
• Heat-damaged wiring at the exhaust-side harness
• Check engine light concerns related to poor sensor connection

Installation Notes and Tips

Verify the connector shape, terminal style, and wire count against the original part before installation. Match the downstream sensor location and route the 450 mm harness to avoid contact with hot exhaust components or moving parts. Confirm secure terminal engagement after splicing or repair work, and inspect the surrounding harness for additional heat damage.

Quality Assurance

Standard Ignition S3171 is built to match the electrical connector requirements of the listed applications and supports repair of the original oxygen sensor circuit on compatible Toyota Corolla, Toyota Matrix, Lexus SC430, Pontiac Vibe, and Mitsubishi Outlander vehicles.