One problem related to transmission solenoid has been reported for the 2003 Volkswagen Beetle. The most recently reported issues are listed below.
Near collision caused by defective automatic transmission solenoid valve body produced and installed on the Volkswagen Beetle and cabrio convertible models. The transmission is a 6 speed automatic tip-tronic shift style specifically used between 2001 - 2004 model years. The defective part causes a sudden jump or jerking motion between gear shifting. In our instance the car jerked and stopped in the middle of an intersection which nearly caused a vehicle collision. This has happened on more than on one occasion. Further research discovered that vw has known about the defective part and that it has caused or been the possible cause of accidents involving these vehicles as well as numerous and constant complaints to vw dealers and on line complaint forums. A replacement of the defective designed internal solenoid valve body is needed to avoid further damage to the transmissions and make the vehicle safe to drive. This is especially an issue for lesser experienced drivers and when he vehicles are engaged in heavy traffic conditions.