One problem related to horn assembly has been reported for the 2009 Volkswagen Passat. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Volkswagen Passat based on all problems reported for the 2009 Passat.
The steering wheel controls stopped working one day, along with the horn. Several days later, the airbag warning light came on, and the display shows "airbag fault" every time I start the car. I purchased an extended warranty for this car, and vw refuses to cover the repair. My local dealership diagnosed the problem to be a faulty clock spring.