While the inspections done at the centers on Salwa Road, may provide you valuable information on the overall condition of the car, they will not be able to give you a 100% accurate result as stated by britexpat. When you buy a second-hand car, it does demand some bits of expenses here and there later on. It is only after you have used the car for sometime that you gradually get to know of its problems. I had made a simple rule for myself. I used to put aside QR 500 each month for car maintenance, although it was not always I got to spend this money every month.