Tip & How-To about Volkswagen Passat
Some new cars have radio alarms. Some have ECM and TCM codes that are erased by disconnecting the battery for any amount of time. Most of these cars are 2000 or newer, such as VWs. To avoid problems, a memory saver (or Aux voltage input device) can be used. A spare battery is also needed to power the device, which is plugged into you cigarette lighter to keep enough power in the car's systems. If power is lost, a secret code for that radio can be used to reset it. The Engine & Transmition modules will need a dealer to reset the computer with cars like VW.
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