NISSAN 54474-01J0A Control Arm Rear Bushing Washer

The NISSAN 54474-01J0A (superseded part number: 5447401J00) is a genuine original equipment manufacturer (OEM) control arm rear bushing washer, serving as a critical mounting component in the vehicle suspension system. This specialized washer ensures stable, play-free retention of the control arm rear bushing to the suspension subframe or chassis.

Technical Characteristics and Specifications:

• Manufacturer: NISSAN (Genuine OEM part)
• OEM Part Number: 54474-01J0A
• Superseded / Alternative Part Numbers: 5447401J00
• Component Type: Control arm rear bushing washer (specialized tension/thrust washer)
• Material: High-tensile, hardened structural steel for maximum load capacity
• Surface Finish: Corrosion-resistant galvanized/zinc coating designed to withstand mud, salt water, and road de-icing chemicals

Function and Importance in the Suspension System:

The primary role of the control arm rear bushing washer is to evenly distribute the clamping force applied by the mounting bolt across the inner metal sleeve of the rubber-to-metal bushing. It prevents axial displacement of the bushing during dynamic loads (acceleration, braking, and cornering). Strict dimensional tolerances and proper material hardness are essential to keep suspension geometry intact, ensuring accurate steering response and even tire wear.

Common Symptoms of Wear or Damage:

• Deformation: Improper bolt tightening torque or mechanical overload can cause the washer to bend, leading to loose bushing retention.
• Corrosion: Rust developing in the harsh underbody environment weakens the washer structure, potentially leading to fracture.
• Metallic Clunking: A worn or deformed washer can allow the control arm bushing to shift, resulting in metallic knocking or rattling noises over rough roads.

When overhauling the suspension or replacing control arm bushings, always inspect the washers and replace them with genuine new components when necessary to maintain safety and factory wheel alignment specifications.