NISSAN D4ABM-VC025 Disc Brake Caliper Seal Kit

The genuine NISSAN D4ABM-VC025 (OEM replacement / interchange part number: 44120VC025) brake caliper repair kit is a premium-quality, precision seal kit designed for the complete overhaul and sealing restoration of the disc brake caliper. The caliper repair kit plays a vital role in the safe and efficient operation of the hydraulic braking system, preventing brake fluid leaks and ensuring smooth, unrestricted movement of the brake pistons.

Technical Characteristics and Features

The kit is manufactured from premium elastomer (EPDM) materials resistant to high temperatures and aggressive brake fluids (DOT 3, DOT 4, DOT 5.1). This guarantees long service life and reliable sealing performance even under severe operating conditions.

• High-Quality EPDM Rubber Material: Maximum resistance to brake fluid, ozone, and environmental weathering.
• Thermal Resistance: Retains elasticity and sealing integrity even under the high temperatures generated within the brake system.
• Dust Boots: Effectively shield the brake piston from dust, dirt, moisture, and road salt, preventing corrosion and piston seizing.
• Piston Seal Rings: Maintain hydraulic operating pressure within the caliper and ensure proper piston retraction when the brake pedal is released.

Significance of the Caliper Repair Kit and Symptoms of Failure

Deterioration or damage to caliper seals presents a direct risk to driving safety. Contaminants entering past compromised dust boots can lead to piston scoring and binding, resulting in uneven braking action, brake overheating, and premature brake pad wear.

Typical symptoms of failure:

• Brake fluid leaks around the brake caliper assembly.
• Vehicle pulling to one side under braking (due to a sticking or seized caliper).
• Unusually soft or "spongy" brake pedal feel.
• Metallic squealing or constant dragging friction even when brakes are not applied.
• Overheating of the brake assembly and a distinct burning smell.