Erratic turn signal operation can be a result of a failing turn signal flasher relay which will require replacement.Google+
Car Problem Reports
Volkswagen Beetle Flasher Relay Failure Can Cause Erratic Turn Signal Operation
Volkswagen Beetle Problem
Average Mileage: 88,136 mi (25,000 mi - 156,000 mi)
Visitor, 2000 Volkswagen Beetle, 85,000 mi
My blinkers stay on and dont blink just solid green light.
Left blinker goes 100x faster than the right. Bulb replaced twice and it still goes out.
Visitor, 2008 Volkswagen Beetle, 39,000 mi
My turn signals work only sometimes. They work when I first use them, but the more I use them they stop working?
Visitor, 2004 Volkswagen Beetle, 91,000 mi
flashes fast on the right side, fine to the left. Haven't gotten it fixed yet.
Visitor, 2002 Volkswagen Beetle, 139,000 mi
turn on the blinker and it blinks once then nothing like you turned it off
Visitor, 2000 Volkswagen Beetle, 156,000 mi
Turn signal does not work, this needs to be repaired by a VW dealership at no cost to the customer. The internet is full of people with the same problem with their VW product, its not just the beetle. I am very disappointed with my car, its very hard to maintain. Parts and service are priced out of my range.
Visitor, 2007 Volkswagen Beetle, 40,000 mi
Turn signals just quit working - I turned the car off and back on, then they started working again...
Visitor, 2004 Volkswagen Beetle, 25,000 mi
Left turn signal fails to operate. Replaced bulb at dealer twice. Took to dealer a third time. They stated the computer was not reporting a turn signal failure. There was no corrosion found, no short and all wires were sound. The blinker works and then it doesn't. It will work fine for 2 weeks and then it works off and on again. The dealership has no definitive answer and charged me $100.00 for labor!
Visitor, 2000 Volkswagen Beetle, 84,556 mi
No turn signal at all.
Visitor, 2001 Volkswagen Beetle, 140,000 mi
solid turn signal illumination.