If it is a gift and not in the form of a dowry and your father in law is really rich to afford such a gift, this is permissible. There is nothing wrong in taking such a gift.

I got married on 2015 Now my father in law wants to gift me a car. Can i accept it? Is it halal for me?

Dowry | July 13, 2017 4:04 am
Previous

IS IT PERMISSIBLE IN ISLAM TO CARRY GIFTS (LIKE GOLD SET, CLOTHS , FRUITS, SHOES, DRY FRUITS ETC) TO GROOM HOUSE AFTER MARRIAGE OR BEFORE MARRIAGE. IT IS VERY COMMON IN INDIA TO SEND THESE TYPES OF GIFT EVERY YEAR AFTER ENGAGEMENT.
Next

what if a husband passed away without paying Mehr money ? After four years of marriage? Widow can ask from her in laws to pay her from their son deceased property ?