Horn does not function. There have been multiple times where I was nearly run off the road or had to quickly change lanes because another driver was not paying attention and I could not tell them I was there without my horn. The problem has been confirmed by the Porsche dealer I purchased the vehicle from and stated it would be more than $800 to replace the horn. They stated there is no way of fixing it and it would have to be replaced. My husbandas 2015 Porsche Cayenne is also having the same issue and I will be filing a separate report. The component has not been inspected by the manufacturer, police, insurance, or others. There were no warning lights or messages. I did notice the sound of the horn slowly getting weaker over a period of maybe 2 months until it eventually stopped making sound altogether. This all began approximately 1 year ago.