This harness adds a secondary ground and an inline fuse to support higher-load fuel pumps on TFSI and TSI platforms. It connects directly into the factory fuel pump wiring to provide a stronger ground path, preventing the main return wire from overheating under heavy load.
 
Features
Plug and play connection, no cutting or splicing required
Adds a secondary ground to offload current from the factory ground circuit
Includes an inline fuse for added circuit protection
Built using OEM connectors and proper automotive-grade wire gauge
Fitment
Designed for MK5 and MK6 TFSI / TSI platforms
Compatible with both factory and aftermarket in-tank fuel pumps
Controlled entirely through the factory fuel pump controller, no coding or configuration needed
 
Why Use This Harness
High-output fuel pumps draw more current than the stock wiring was designed for. This harness provides a dedicated ground path to reduce voltage drop, protect the factory wiring, and maintain stable fuel delivery without modifying the OEM circuit.
 
Notes
Connect the secondary ground to a clean, bare-metal chassis point
Ensure the inline fuse is fully seated before installation
This harness does not modify or bypass the factory fuel pump controller