A good OBD-II scanner in your glove box or trunk can be quite useful in those situations when your car’s Check Engine light unexpectedly illuminates while you’re driving along a lonely country road or just a week away from having your vehicle inspected. The best OBD-II scanners, which range in price from $25 to $200, are able to make up for their cost in this manner. One of the top OBD-II scanners is no longer a luxury that can’t be afforded, but rather something that all drivers should have in their vehicles.