National Car Rental is a leading car rental company providing services internationally. It also offers premium customer service, online reservations and deals. Customers appreciate the top features in car choices, discounts and services.When it comes to offering discount codes, National Car Rental very rarely issues promotional discount codes. National Car Rental is among the most sought-after brands when it comes to coupons and discount offers, with hundreds of thousands of searches for coupons each month, offset against its relatively low volume of coupons issued.