NISSAN 46206-2J00A Brake Hose Lock Spring

The genuine Nissan 46206-2J00A brake hose lock spring (factory designation: SPRING LOCK B/H) is a compact yet critical safety retaining element within the vehicle's braking system. Its primary function is to securely and rigidly mount the flexible brake hose to the bracket integrated on the bodywork or suspension. This prevents unwanted movement, twisting, rubbing, or contact of the brake hose with surrounding moving components.

Technical Specifications and Construction:

• Material: Premium-grade, highly resilient hardened spring steel that provides long-lasting clamping tension even under extreme vibration.
• Surface Treatment: Specialized anti-corrosion coating (galvanized or phosphated finish) resistant to moisture, road salt, and brake fluid.
• Design: U-shaped profile engineered to fit precisely into the groove of the brake hose metal fitting, ensuring play-free retention.
• Installation Location: Front and rear brake hose connection points between the brake caliper and the rigid brake pipe line.

Significance and Failure Symptoms:

During brake system servicing or brake hose replacement, the condition of the retaining springs is critical. An aged, weakened, or missing spring allows the brake hose to move freely, which can lead to chafing, cracking, and sudden loss of brake fluid due to mechanical stresses encountered during steering and suspension travel.

Common signs of wear or failure include:

• Severe surface corrosion that undermines the structural integrity of the spring.
• Loss of spring tension, causing the brake hose to loosen within its mounting bracket.
• Mechanical deformation or breakage resulting from improper installation or removal.

To maintain maximum safety, it is recommended to replace the retaining springs with new genuine Nissan components whenever brake hoses are replaced.