Was looking around today about what I had out in the garage and some clearing out I want to do...found this as I had hunted forever to find one for my b3 wagon and then sold it. However, it'll work nicely. Works in all MK3 cars with alarm, and will work in b3/b4 with simple modification (a bridge I think). Simply replaces the stock "silver" alarm box behind the drivers side dash vent. Gives you the ability to have factory keyless entry without the pain of installing a aftermarket alarm.
Was tested...so I know it is working. Only thing you'll need to buy is the "banjo" remote for it and there are simple directions about how to set it up with the module. The banjos are available all day long on ebay for 20-30 bucks. Easy easy....clean upgrade...or addition...
1HM 937 045 Q (White Box)


First to pay gets it and I'll take paypal.
60 shipped. Look around...most are going for 70 or so...fair price. Good unit.
Joe