[BWT]

All
Volvo do sell the control module separately. When i bought my tow bar the wiring harness and plug was in the box this also had a separate part number so i would be surprised if they don't sell as an individual part.
As a matter of interest i spoke with Right Connections before going down this route and they told me their did not need coded when asked about TSA they told me their unit only did the basics because and I quote "Volvo are very cagey with the electrical info".

Regards