Defect
On certain vehicles, the front steering knuckles may not have been properly heat-treated. As a result, a strong impact (such as hitting a curb) could cause a steering knuckle to bend or break. If this happens, the steering wheel may become off-center or there could be a loss of steering control and a wheel could separate.
Safety Risk
A loss of steering control and/or a wheel separation could increase the risk of a crash. A wheel that separates could also hit another person or vehicle.
Remedy
Nissan will notify owners by mail and instruct you to take your vehicle to a dealer to inspect the production date on the casting stamp of the front steering knuckles. Parts that are affected by this problem will be replaced.