NISSAN 41120-01A27 Disc Brake Caliper Seal Kit

The genuine NISSAN 41120-01A27 (superseding/substitute part number: 4112001A28) disc brake caliper repair kit (SEAL KIT-DISC) is a premium quality, original equipment part designed for sealing and rebuilding disc brake calipers. The brake caliper repair kit plays a critical role in maintaining hydraulic brake pressure and protecting moving components from environmental contamination.

Function and Importance

The primary function of the brake caliper seal kit is to prevent brake fluid leakage past the brake piston and to ensure proper piston retraction when the brake pedal is released. The rubber seals and dust boots included in the kit protect the brake piston and internal caliper cylinder bore from water, mud, brake dust, and other road contaminants, thereby preventing corrosion and piston seizure.

Signs of Brake Caliper Failure and Wear

• Brake fluid leak: Moisture or brake fluid visible around the brake caliper, which can lead to a severe decrease in braking performance.
• Seized brake piston: Damaged dust boots allow moisture intrusion that causes rust, leading to brake dragging, overheating, or uneven braking force.
• Vehicle pulling during braking: If a caliper does not function properly due to damaged seals, the vehicle may pull to one side under braking.
• Uneven brake pad wear: A piston that fails to retract properly causes premature and uneven wear on brake pads.

Technical Specifications

While exact physical dimensions vary depending on the specific caliper type, genuine NISSAN repair kits meet the following high standards:

• Material composition: High-grade, brake-fluid-resistant rubber (EPDM) formulated to withstand high temperatures and chemical exposure.
• Compatibility: Fully compatible with DOT 3, DOT 4, and DOT 5.1 brake fluids.
• OEM Quality: Manufactured to strict OEM (Original Equipment Manufacturer) specifications, ensuring an exact fit and long service life.
• Alternative Part Number: 4112001A28