you have a choice on the term length like you do on any new loan....most of the time you have to choose a number of years...like ours only does 12, 24, 36, 48, and 60 month terms for car loans (no 1/2 years or 3.5 year loans...)....so you pick whichever you want. You can go back to the full five years to stretch your payments out and reduce the payment even more, or you can opt for the 3 or 4 year term....and reduce the monthly payment less, but end up saving more money in the long term...it depends on what's important to you....
With a house, so few people stay in them for the full term length, that it doesn't make sense to try to pay it off....so it's better for most people to stretch it back out to 30 years....they pay as little in as possible while they own the house and continue to receive tax benefits on the interest. Paying interest on an asset that only increases in value isn't a bad financial move....
Cars however, most people keep until they're paid off, and paying interest on a depreciating asset (which a car is....they never go up in value) is bad, so it makes more sense to try to pay it off as quickly as possible, and pay as little interest as possible, especially since there are no tax deductions for this interest.