Up for sale is a Working, in excellent condition VW Bosch ECU  This ECU should fit many 1974 VW aircooled models, from a 1974 1.8 Liter 412.   I make no fitment guarantees unless your original part number MATCHES the ones listed. VW used several different units over the years, and even different ones the same years for federal Vs California emission, automatic or manual, and various accessories. The info for what units originally came with what cars is sketchy at best so your best bet is to check the ORIGINAL unit in your car / bus. A defective or intermittant ECU can be one of the most common no start or random stalling problems with these Bosch L-Jet controled cars. They can also cause problems with incorrect fuel mixture (lean or rich running) which may cause excess smoke, pinging, overheating, or generally poor running. If yours does not have this problem, keep an extra ECU in the trunk, you might some day be glad you did... These units are no longer available almost everywhere and VERY hard to find a correct unit used. I have many of these, you sould be able to find a correct one for your Vintage VW from me! This comes with a 30 day functionality warranty.