Broken pieces of the pulley can get caught between the pulley and the drive belt, causing the drive belt to come off and resulting in the driver needing increased effort to steer the vehicle increasing the risk of a crash.

The tension adjuster pulley for the drive belt that operates the power steering pump and air conditioner compressor (if equipped) has an outer portion that is made of plastic. Repeated heat stress can cause the plastic material to deteriorate and pieces of the pulley can break off.

What to do: Book this in with a dealer now. It affects a safety system.