How can a car be purified from ritual impurity after being used in an act displeasing to God?

"It is not obligatory to wash the car merely because a sin was committed in it, for forbidden acts do not cause physical impurity, unless the car was affected by an actual impurity like urine or similar substances, in which case only the impure part must be washed. It is advisable to stay away from bad company and associate with pious believers, as the Prophet (peace be upon him) said: 'Do not associate except with a believer, and let none eat your food except a pious one.'"