Toyota has a patent application that covers something that sounds very unlike Toyota. The system is an in-car fragrance dispenser to make things smell better. The catch is that the fragrance system can be used as a defensive weapon.
When the vehicle detects an illegitimate engine start, it can release tear gas into the car. The real use of the system would be to pipe scents into your ride. Our question is, would the piped in scent get annoying after being exposed to it for a while.
The upside is that if your significant other prefers a heavy floral scent, the car has a deodorizer that will remove the smell for the next driver. It’s not clear how you would refill the scents or if having your own tear gas dispersal unit is legal.
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