NISSAN 90520-VB00A Rear Door Bumper Stopper

The genuine Nissan rear door bumper and load-relief stopper (BUMPER B/DOOR) with part number 90520-VB00A is a premium-quality OEM component that plays a vital role in stabilizing and protecting the vehicle's rear door structure.

Function and Operating Principle

This relief bumper is located at the contact point between the rear door (tailgate) and the body. Its primary function is to provide optimal preload to the door when closed, thereby:

• Relieving stress on the latch mechanism and hinges: Reduces mechanical stress caused by driving vibrations and body torsion.
• Damping vibration: Absorbs vibrations, preventing irritating rattles from developing in the cabin.
• Protecting paintwork: Keeps the door firmly positioned to prevent metal-on-metal contact, rubbing, and subsequent corrosion.

Technical Characteristics

• Material: Specialized high-density vulcanized rubber and elastomer compound offering excellent shape retention and elastic properties.
• Environmental resistance: Resistant to UV radiation, extreme temperature fluctuations, moisture, and road salt.
• Installation position: Rear door frame or door edge (vehicle-specific mounting).

Common Symptoms of Wear

Over time, rubber bumpers can deteriorate due to continuous mechanical loads and environmental exposure. Replacement is recommended when experiencing the following symptoms:

• Cracking, hardening, physical wear, or deformation of the rubber surface.
• Rattling, squeaking, or knocking noises originating from the rear door while driving.
• Improper rear door alignment, difficult closure, or premature wear of the latch mechanism.