Ok everyone I just got this in the Mail from Nissan North America :

"Water may enter the rear axle housing due to inadequate sealing of the ABS sensor in the axle housing. This may result in corrosion and eventual failure of the wheel bearing. If this occurs, the wheel assembly could separate from the vehicle and result in loss of control of the vehicle and a crash."

Ok so I have to go to dealer and get this fixed.
By the way this recall notice is for 2001-2003 Terras and Frontiers.