NISSAN 25128-C7000 Rear Wheel Bearing Lock Nut

The genuine Nissan 25128-C7000 rear wheel bearing lock nut (factory OEM designation: NUT LOCK RR W/B) is a critical safety fastener responsible for securing the rear wheel hub and bearing assembly firmly and without play to the axle spindle.

Key Technical Features and Functions:

• Premium Material Quality: Manufactured from high-tensile, hardened carbon steel that withstands extreme mechanical stress and vibrations acting on the suspension.
• Corrosion Protection: Features a specialized surface treatment to prevent rust caused by moisture, mud, and road salt.
• Secure Locking: Designed with a mechanical locking feature (stake collar or prevailing torque) that prevents the nut from backing off under driving vibrations.
• Fitting Position: Rear axle, wheel hub and bearing mounting.

Why Replacement Is Essential:

The wheel bearing lock nut is a single-use fastener on most Nissan models. Any nut loosened during wheel bearing replacement or brake disc/drum removal must not be reused for safety reasons, as deformation of the locking collar or thread stretching means it can no longer guarantee the specified clamping torque.

Signs of Failure or Wear:

• Damaged, stretched, or stripped threads resulting from improper tightening.
• Cracking or breakage of the locking collar.
• Heavy corrosion that impedes removal and weakens the structural integrity of the nut.
• Looseness in the wheel bearing causing unstable road holding, uneven tire wear, or humming noises.

Using genuine Nissan parts guarantees a perfect fit and maintains accurate tightening torque in compliance with factory specifications, maximizing driving safety and bearing service life.