Car upgrade?

I've sort of been thinking about my car situation. Either I keep the car I have, which is a 2001 Japanese made with 141,000 miles -OR- get a newer 2006-2007 Japanese made car with around 40k - 50k miles on it and pay the difference of about $5,000. My car is 10 years old this year, and I know I can drive it at least another 3-4 years with basic repairs. This car will keep going to at least 200k miles!

I've never loved the car I'm in, and would really LOVE to have heated leather seats because I get cold so easily, but should I? Never going in debt to buy another car would be key, and I have the money now, but do I want to do this?

It's something to think about.