I'm doing a 13bREW swap into my pro street 69 beetle. Can anyone please help in any way with what all the stock ECU needs to run. Engine has full wiring harness for all sensors and everything as well as the ecu. I have the full wiring diagram for the car so I can wire up my toggles for ignition, starter etc. do I need the interior wiring harness? Every bit of help is appreciated. Thanks a ton guys/gals!

 

To be honest I'd just start from scratch. There're resources here to find factory connectors etc.

When using the factory parts you'll end jumping through a few X connectors through the dash for the coils and a couple other things.

If you need help making your own harness PM me.

 

You only need the engine harness. As that harness comes into the interior of the car and connects to the ecu, there is a connector block on its own seperate from the others which connects to the harness inside the car. You'll need to figure out what these wires do. I assume they're for rev counter, speedometer and the switches/sensors on the gearbox.