One problem related to brake whistling noise has been reported for the 2009 Volkswagen Jetta. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Volkswagen Jetta based on all problems reported for the 2009 Jetta.
I purchased a 2009 Jetta tdi. This is my 3rd Jetta tdi, 2004, 2006, and now a 2009. At 3,500 miles the brakes on the 2009 tdi began making a high pitch whistling noise at slow rolling stops. After a couple of stops it would stop and then reappear after the car had been parked for a couple of hours. I called the dealer, and was told that it was normal and should eventually stop. At 7000 miles it still whistles. I took it to the dealer for inspection and was told that rust was forming on the rotors and the whistling sound was the brakes scraping the rust off. I was told that my brakes were fine. I asked if this was a problem I would have to live with, whistling brakes for the life of the car? how embarrassing to own a new car and the brakes whistle when you pull up to a stop sign. I called vw America and was told that they couldn't tell me anything. They depended upon the dealers to provide them with issues/concerns. Neither of my previous 2004 or 2006 Jetta tdi's brakes whistled. So vw is this normal? if so, then I have purchase my last whistling Jetta.