There are two factors involved.
The vinyl : we use vinyl that is rated for a least 7 years. This means it will not fail, crack, or shrink for that period.
Fading : Harder to predict because of the varied amount of direct sun exposure. On average we are seeing 2 to 3 years before noticeable fading begins. Vehicles kept in a garage, side of a building, or anywhere that does not get direct sun will last much longer.