a friend of mine just recently had to get his WRX repaired due to a broken cam gear. he's the type that doesnt race pr push the car to the limit, however the cam gear decided to take a **** on him on normal driving. he is the 4th owner with 100K on the car. i was told the cam gear is made of plastic, and broken because of that. this is a first i heard of a cam gear breaking under normal driving, but then again it could of had broken from one of the previous owners driving it. he's gonna have it replaced with either steel or billet material. how often does this type of issue come up?