If a car has functions which can be controlled by a smartphone app then, if that car is sold secondhand, it may still be able to be controlled by the previous owner.

wtkr.com/2017/02/18/why-buying-used-cars-could-put.../

More electronics madness put out by car manufacturers who have not thought things through and are more concerned with gimmicky features than security and practicality. Once again when buying secondhand it pays to be behind the times.