A friend of mine has a brother who owns a z. She told me that he kept having trouble with a knocking noise whenever he switched gears and also when he pressed on the brakes. Well he finally took the car back after the millionth time to Nissan and they told him that there is a recall on the 6MT 2005 Zs but they will not annouce it publicly. They said only if the owners/drivers complain about the problem then they will fix it without a charge. Is this true? Has anyone heard of anything. btw my car is starting to sound funny. I am wondering if I am just paranoid or if there is a problem at hand here.