Some medicines, tricyclic antidepressants and antimalarials can also cause darkening of your gums The nastiest is the effect of acute necrotising periodontitis (sometimes known as trench mouth) which is advanced gum disease and the black colour is the result of dead tissue
The cost of replacing an airbag outright can be several hundred dollars, although it once again depends partially upon the exact make and model of the car that you're working with. Expect to pay on the order of $1000 to $1500 per airbag to be replaced. Number 3 -- Airbag Resetting. If you've been in an accident, and the airbags themselves have become deployed, you'll have to set them back up in order to be able to drive again.
1 Passenger-side air bags typically cost $400-$1,000 or more; side-curtain or knee air bags are less common and prices vary, but they typically cost about the same or slightly less than passenger-side air bags, depending on the size and design of the side-curtain air bag. (Some passenger-side airbags are designed to deflect off of -- and break -- the windshield, and may also break the dashboard.) Labor at $30-$90 or more an hour is usually about a third of the total cost.