Is it worth fixing my car before trading it in?

Usually only small, inexpensive fixes are worth it. Replacing a burned-out bulb, topping off fluids, or getting a professional detail can improve first impressions for little money. Major repairs such as transmission work, new tires or significant body damage rarely raise the trade-in offer by as much as they cost, because dealers can often fix those items more cheaply than you can. Get a repair quote and compare it with how much the issue reduces your offer before spending money.