My car tends to drift to the left. Not terribly so, but it is noticeable at highway speeds. It does it an all lanes, though obviously is happens more in the left lane (due the the crown of the road). Is this typically an alignment issue, or something else? The car is a 2007 C4 with about 3k on the clock. To the best of my knowledge, I haven't smacked into anything or hit any enormous potholes that would have knocked the alignment out of kilter.

 

Certainly sounds like an alignment issue.
Are any of your tires wearing on the inner/outer tread areas? Either way I'd bring it in for an alignment check.

 

My past 2 911's came with crappy alignments....sounds like you have the same problem. Also, you might want to have them add a bit of negative camber while they're doing it as it will settle the car a little more.

 

I don't think the dealers check the alignment when they get them off the ship anymore. I had to have the last two 997's realigned on delivery. The steering wheel should centered and they should not drift either way when you let go of the steering wheel. Anyone Porsche service person who brings up the crown on the road factor doesn't know what he is talking about.

 

I had the same thing happen in my GT3.

For some reason the rear tire on the driver's side was toed out causing the car to want to change lanes on its own.

 

I had the same problem with under 1000 miles. First alignment should be covered for the first few months I believe. Mine was. Also check tire pressures.

 

I've had this same type of problem turn out to be a tire, and not alignment. I'd certainly check alignment and tire pressures first, but if that doesn't fix it, you've probably got a bad tire.

 

Porsche recognizes that many 997 products arrive with alignments that are very out of whack. I understand there's even a service bulletin on it. Mine was bad the day I picked up my car and so I complained. My SA said "no problem, bring it in and we'll take a look". They printed out the "before" and "after" and wow, the factory settings were very messed up. No charge and I had a Cayenne loaner that day. I understand this free realignment is up to 2k miles though...