Is it wise to get a home equity loan to buy a new car?

Answer

No. Home equity loans are revolving credit lines. In simple terms, that means you could pay on that for three years and not even touch the principal. I wouldn't do it. Maybe rolling it into a consolidation loan if you have enough equity in your home, but not a HELOC.

Answer

No. You want to avoid "institutionalizing" your debt. In other words, you don't want to spend 15 years on an equity loan paying for a car that you might only have 5-6 years. It really depends on your personal situation. If you have lots of equity in a house, and the monthly payments aren't too much, and you expect that the house will continue to appreciate etc. then MAYBE. But what if interest rates rise (equity loans are usually directly tied to the fed rate), or the housing bubble bursts - then you are stuck with those payments forever. Upside is that the equity loan is tax deductible, car loan is not. Do the math!