Dorman 645-540 Headlight Socket

Dorman 645-540 Headlight Socket for Mazda Low Beam

Dorman 645-540 is a replacement headlight socket built to match the original equipment fit and terminal count for specified Mazda applications. It uses quality materials and corrosion-resistant contacts to support dependable electrical connection in the low beam circuit.

• Replacement headlight socket for Mazda low beam applications
• Blade terminal design with female terminal gender
• 2-wire configuration for OE-style electrical connection
• Overall length: 1.5 in
• Corrosion-resistant contacts for reliable service

Detailed Product Overview

This Dorman headlight socket is made for drivers replacing a damaged, heat-affected, or corroded low beam connector on Mazda 3, Mazda 5, Protege, and Protege5 models. Part number 645-540 is engineered to match the original socket layout so the headlight connection remains consistent with the factory design. This part cross-references FEL-PRO 1439 for the same application.

Vehicle Fitment

• Fits 2006-2010 Mazda 5, low beam; male
• Fits 2004-2009 Mazda 3, low beam; male
• Fits 2001-2003 Mazda Protege, low beam; male
• Fits 2002-2003 Mazda Protege5, low beam; male

What This Part Helps Address

• Broken or brittle headlight socket housing
• Corroded or heat-damaged electrical contacts
• Intermittent low beam operation
• Poor connection at the headlamp plug
• Connector wear from age or moisture exposure

Installation Notes and Tips

Verify the terminal count, blade-style connection, and vehicle-side connector before installation. Inspect the headlamp wiring for heat damage or corrosion and repair any damaged conductors before connecting the new socket. Confirm the low beam circuit functions properly after installation on Mazda 3, Mazda 5, Protege, or Protege5 applications.

Quality Assurance

Dorman designs this replacement socket to match OE fit and terminal count, with corrosion-resistant contacts for consistent electrical performance. Part number 645-540 is built for direct replacement use in the specified Mazda low beam applications.