Dorman 904-417 Diesel Glow Plug Wiring Harness

Dorman 904-417 Diesel Glow Plug Harness

This Dorman diesel glow plug wiring harness is a direct-fit replacement for the original harness on select Audi and Volkswagen diesel applications. Built with copper conductors, Teflon insulation, and female lug terminals, it restores reliable electrical connection for cold-start performance and check engine light concerns.

Key Features

• Specific-fit replacement for select diesel engines
• Matches original equipment fit and function
• Copper wire core with 16 AWG wire gauge
• Teflon insulator material for heat resistance
• Female copper terminals with female lug terminal type
• Black harness construction for OE-style routing
• Designed for 4-wire glow plug harness applications

Detailed Description

Dorman 904-417 is a diesel glow plug wiring harness made for specific Audi A3, Audi S3, Audi A3 Quattro, Volkswagen Jetta, Volkswagen Golf, Volkswagen Beetle, Volkswagen Bora, and Volkswagen Passat diesel applications. It is built to match the fit and function of the original equipment harness, helping maintain consistent electrical contact to the glow plugs during cold starts. This part number, 904-417, is a practical OE-style replacement when the factory harness is damaged, brittle, or no longer making dependable contact.

This part cross-references Genuine 038971782C for the same application.

What It Helps Solve

• Hard starting in cold weather on diesel engines
• Glow plug circuit faults caused by worn wiring
• Check engine light related to glow plug harness issues
• Intermittent electrical connection at the glow plugs
• Heat-related harness deterioration and insulation wear

Installation Notes and Tips

Verify vehicle year, engine, and diesel configuration before ordering. This harness is a specific-fit part, so routing and terminal style should match the original harness on the vehicle. Inspect the glow plugs and related connectors during installation to confirm the source of the fault before replacing the harness. For best results, compare the existing harness layout to the replacement part number 904-417 prior to installation.

Quality Assurance

Dorman manufactures this replacement harness with quality materials for durability and reliable performance. The design follows the original equipment fit and function for the listed Audi and Volkswagen diesel applications, supporting consistent electrical connection in secondary ignition service.