You can rent a car at the exit of the main terminal of the airport. You can book your car rental in Brussels with no deposit in advance from anywhere in the world - just use the online service.
The price of car rental in Brussels per day depends on the class of the car and the point of pickup/return. The cost of renting an economy class car is from 70-80 EUR per day. The cheapest car rental in Brussels is for small cars (from 50 EUR per day).
