Denso 234-4280 Oxygen Sensor - Downstream Front

Denso OE Style Oxygen Sensor 234-4280

Denso 234-4280 is a specific-fit heated oxygen sensor built to OE-style dimensions and electrical requirements for direct replacement service. It is engineered for the downstream front position on select Mitsubishi Endeavor and Mitsubishi Galant applications, helping restore accurate exhaust feedback and stable engine management.

Key Features

• Heated oxygen sensor with 4-wire configuration
• Specific fit for direct replacement on listed Mitsubishi applications
• Threaded mounting with 0.708 in. thread diameter
• 20.87 in. wiring harness length for proper routing
• OE Style design for first-time fit and factory-style installation
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

OE Style Design Details

Denso’s OE Style line is built and tested to strict original-equipment standards, with precision construction aimed at matching the factory sensor location and connector layout. The Denso 234-4280 uses a male connector and heated sensor design to support consistent signal response in the exhaust stream. For buyers searching for a downstream front oxygen sensor for Mitsubishi Endeavor or Mitsubishi Galant, this part number is a direct-reference option that aligns with the original fitment profile.

This part cross-references Bosch 13822 and Delphi ES20082 for the same application.

Vehicle Fitment

• Fits 2010-2011 Mitsubishi Endeavor, Downstream Front, OE Style
• Fits 2004-2008 Mitsubishi Endeavor, Downstream Front, OE Style
• Fits 2009 Mitsubishi Galant, Downstream Front, OE Style
• Fits 2004-2007 Mitsubishi Galant, Downstream Front, OE Style

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect exhaust oxygen readings affecting fuel control
• Rough idle or drivability issues tied to sensor signal degradation
• Reduced fuel economy caused by inaccurate air-fuel feedback
• Sensor contamination from silicone or lead exposure

Installation Notes

Confirm the downstream front location before installation and match the connector, wire count, and thread size to the original sensor. Inspect the harness routing and exhaust threads for damage or contamination before threading the sensor into place. For Mitsubishi Endeavor and Mitsubishi Galant applications, verify the OE-style connector orientation and harness length so the sensor reaches the factory mounting point without strain.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent fit and function. The precision-built design supports direct replacement service, and the protective trap layer is intended to help extend sensor life in demanding exhaust conditions.