A modern touchscreen makes an older car feel brand new. You get maps, music, and hands-free texts without fumbling with your phone, but it usually costs about $850 for a quality unit and installation. The best time to buy is right after the new models hit the shelves, when retailers slash prices on last year's inventory to clear shelf space.
You do not need to drain your savings to make this happen. By using a 0% interest window, you can spread the cost out over time without paying extra fees for the privilege. Just keep in mind this is a loan, not a discount.
Remember that this 0% offer is a deadline, not free money. If you have any balance left after the 18 months are up, you will be hit with interest on the remaining amount, which can be expensive.