The factory harness the fuel pump control module is only capable of supplying enough current to drive the factory in-tank low-pressure fuel pump the vehicle was originally equipped with.  High-capacity aftermarket in-tank fuel pumps generally draw more current than the factory control module that it was designed for.


This is a Plug and Play harness that comes with a secondary ground, to be grounded into the factory ground bolt location in the C pillar to prevent overheating while using the oem fuel pump wiring with larger high-pressure fuel pumps. 


Fuel Pump Upgrade Harness (MK5,MK6 TFSI /TSI)