I got 2 radios from other 01 Jettas on Ebay and have all security codes but am wondering if this is an easy swap. It should just be plug in, enter the code and play the unit but the dealership has given me some pause by saying the other radios may not work correctly and may mess up the security system on my Jetta among other things. I would assume an aftermarket radio would cause some problems but I would think that the factory radios would just plug in and work fine. I have the small radio with no midrange adjustment and have bought two of the units with the midrange adjust on them. Thanks
John