How often should the sunroof drain tubes of Volkswagen be replaced?

[LeHope]

Volkswagen sunroof drain tubes are generally replaced every three years or after driving 90,000 kilometers. Below is relevant information about sunroof drain tubes: 1. Principle: Below the sunroof guide rails, there are reserved drain outlets and drain tubes. On rainy days, rainwater enters the gap between the sunroof and the roof, flows down to the guide rails, and then along the rails, eventually entering the drain tubes, which discharge the water to the bottom of the car through the pipeline. 2. Measures to prevent water ingress through the sunroof: (1) Regularly check the sunroof guide rails to see if there is any dirt accumulation. If so, wipe it clean with a cloth. (2) Open the sunroof to observe where the drain holes are located and remember their positions. Only by knowing the location of the drain holes inside the sunroof can you solve problems on your own.