Does a car matter when impressing a lady?

Nope, I don't care. :) I mean, good Lord! I drive an 88 Caddy that I spray painted peace signs on and then scrubbed off with oven cleaner. :) Haha, true story. Hope this makes you feel better.

Some do some don't. I just don't want a guy who doesn't have a car or has a filthy, beat up pickup with Coronas, chili cups and dirty socks left in it (yes some guy had that in his car). If it is a really POS than you might have some trouble. If it is average I think you will be ok, most of the guys here do not even have a car and any kind of ride they have is a mooch off some friend or family member.

Not in the way that you might think. For me, having a car (if you don't live somewhere with readily available public transport) means that you are independent, and also stable as you are able to maintain having a car. So I think it shows a lot about personality. It's not about the car looking good or anything like that.
On the other hand, if you live in a major city with plenty of transport, then it is a total non issue.

drive a van, more room in the back if u know where im getting at ;)

I'm sure there are shallow girls like that, but most of them won't use it against you. And if you do, then they're probably not worth keeping anyways.

They don't care. Just don't show up at their house riding a bicycle.