New, complete kit with instructions. Can be used on Mk1, Mk2, & Mk3 window instalations [AML 37.81867 / 37-81867, 37.111361AA / 37-111361AA, 76.111926AA / 76-111926AA] irrespective of whether the ECU or the motor sensing has a fault. Works slightly differently but even faster!  Made from bare PCBs in the UK. .
Good second-hand Mk2 and Mk3 ECUs are also often available.