Fuel Pump Upgrade Harness (MK5 MK6 TSI TFSI)
This harness is designed to support higher load fuel pump applications on MK5 and MK6 TSI / TFSI vehicles by adding a secondary ground path and inline fuse protection to the factory fuel pump circuit.
The additional ground path helps reduce the electrical load carried by the factory ground wiring, which can become a source of excessive heat in higher current fuel pump applications.
The harness integrates directly with the factory fuel pump wiring without cutting, splicing, or bypassing the factory fuel pump controller.
Key Features
• Adds a secondary ground path to the factory fuel pump circuit
• Helps reduce electrical load on the factory ground wiring
• Includes an inline fuse for additional circuit protection
• Plug and play design with no cutting or splicing required
• Retains operation through the factory fuel pump controller
• Uses OEM style connectors and the correct automotive wire gauges
• Properly sized and sleeved for clean factory style routing
Fitment & Compatibility
• MK5 TFSI applications
• MK5 TSI applications
• MK6 TSI applications
• Compatible applications using the supported factory fuel pump wiring configuration
• Can be used with factory or compatible upgraded in tank fuel pumps
Important
This harness does not bypass or replace the factory fuel pump controller. Fuel pump operation remains controlled through the original vehicle system.
The secondary ground must be connected to a clean and secure chassis ground point for proper operation.
Please confirm that the inline fuse is properly installed and seated before operating the fuel pump.
If you are unsure about compatibility, send your VIN along with photos of the existing fuel pump wiring and compatibility can be confirmed before ordering.
Why This Harness?
Higher load fuel pump applications can place additional electrical demand on the factory fuel pump wiring, particularly the ground circuit.
This harness adds a secondary ground path to help distribute the electrical load while retaining the factory fuel pump controller and original vehicle wiring configuration.