You could have a wheel sensor fault....it can cause severe problems when the abs thinks the wheel is locked up and it isn't

I would get the codes read from the steering/ABS system and see what's up

In the meantime be careful....

 

Visit dealer tomorrow, let see what they can find out! Hope its only air in brake lines....! :p

 

Just visited my dealer and codes read, fault was wheel speed sensor cause of different profile on front and rear tires. Different profile front and rear combinet light weight rims can disturb little abs, traction when driving, braking hard etc...!(says dealer)
Glad thats nothing broken! Very sensitive machines these rx8s!

 

Yes I really like this community all thew above participants perform well and expose their ideas awesomely. Its clear me too what problem I have inside. So its my goodness to have this.
Keep it up buddy...