NISSAN 44141-AW70A Brake Caliper Guide Pin Bolt

The genuine NISSAN (SKU: 44141-AW70A) guide pin bolt (PIN-BOLT) is a safety-critical fastening and guiding component within the vehicle's braking system, engineered specifically for floating caliper disc brake assemblies. This precision-engineered part ensures the proper alignment and smooth movement of the brake caliper during braking operations.

Technical Specifications and Function:

• Primary Function: Secures the brake caliper guide pin, facilitating the axial movement of the caliper toward the brake disc when the brake pedal is depressed.
• Material Quality: High-tensile, heat-treated steel alloy capable of withstanding extreme mechanical loads and high thermal stress generated during braking.
• Surface Treatment: Specialized anti-corrosion coating that protects the component against road salt, moisture, and environmental elements.
• Precision Threading: Thread profile engineered to factory OEM specifications for secure, vibration-resistant fastening.

Importance and Role of the Guide Pin Bolt:

The correct operation of floating brake caliper systems directly relies on the condition of the guide pins and their securing bolts. The bolt ensures that the brake caliper remains stable yet free to move as required. Damage or deformation to this part can cause caliper binding or sticking, significantly degrading braking efficiency and overall road safety.

Typical Symptoms of Wear or Failure:

• Uneven Brake Pad Wear: A seized guide pin or bolt prevents the brake pads from retracting properly, causing uneven or premature wear.
• Braking Noise: Squeaking, squealing, or metallic noises resulting from abnormal caliper movement.
• Reduced Braking Performance or Pulling: The vehicle may pull to one side under braking if the caliper cannot glide smoothly.
• Corrosion and Mechanical Damage: Ingress of moisture due to inadequate maintenance or damaged rubber dust boots can lead to rust formation and seized bolts.

Because the braking system is a critical safety assembly, it is always recommended to use genuine OEM parts when replacing guide pin bolts, and to properly lubricate the caliper slide pins with high-temperature brake grease.