Damn, this got me thinking I should check mine! 98k miles and only owned the car 5 weeks, so havent really checked the levels..
Obviosuly original cap, right? Says >PA6.6GF30< under the cap. There was a high pressure that was released when I twisted it off, and also some steam! There are also white dried powder, almost cocain like, on the outside of the cap.
Should I be worried? Do I need to replace it? And where do I buy one online?