How to Build Your Own Gen5 Haldex Harness – Step-by-Step Guide
by
Adam Forbes
07 Sep 2026
Building your own Haldex harness is a cost-effective way to get a high-quality, custom-fit wiring solution for your Gen5 MQB platform. In this guide we walk you through everything you need to know.
Watch the Full Build Video
The video covers the full step-by-step process, from selecting the correct terminals and connectors through to crimping, sleeving, and testing the finished harness.
What You'll Need
Full parts lists and harness specifications are available on the OpenHaldex GitHub repository. All designs are open source.
Gen5 Harness
The Forbes Automotive Gen5 Haldex Harness is also available pre-built if you'd prefer a plug-and-play solution. Designed to work directly with the OpenHaldex C6 controller on MQB platform vehicles including Golf R, S3, and TT RS.