Bro, read a little about warranty of electrical components, there is nothing in it that they are going to claim. Electrical components if burnt or damaged there won't be any warranty; Furthermore, nothing happens to electrical components because if its going to happen it will happen God forbid in first 1000kms. Otherwise everything will be fine so I would suggest get some branded headunit from outside and good quality cameras instead of the ones that Toyota are giving and fit them. Carnation at Liberty Lahore can be the best spot to buy these things.