NISSAN 21506-15S00 Radiator and Intercooler Mounting Rubber

The genuine Nissan 21506-15S00 radiator and intercooler mounting rubber (vibration damper bushing) is a critical mounting component that provides stable yet flexible securing for the vehicle's cooling system and charge air cooler (intercooler). This genuine OEM part guarantees a perfect fit and long-term reliability.

Function and Importance

Internal combustion engine operation and varying road conditions continuously generate vibration and mechanical stress. If the radiator or intercooler were rigidly bolted to the vehicle body, these vibrations would quickly lead to fatigue cracking of the metal or plastic core structure, causing coolant or boost pressure leaks. Manufactured from specialized elastomer, this mounting rubber absorbs harmful vibrations, minimizes structural stress, and protects the structural integrity of the cooling system.

Technical Features and Properties

• Material Composition: Premium-grade, high-heat and ozone-resistant EPDM rubber (elastomer) that withstands underhood chemicals (oil, coolant) and extreme temperature fluctuations.
• Vibration Damping: Outstanding NVH (noise, vibration, and harshness) damping characteristics for a quieter passenger cabin and extended component service life.
• Design: Precision-molded to fit factory mounting brackets and retaining points perfectly.
• Durability: Highly resistant to fatigue cracking and permanent deformation under sustained load.

Signs of Wear and Failure

Rubber components naturally deteriorate over time due to thermal cycling and environmental exposure. The most common symptoms of failure include:

• Visible Damage: Cracking, crumbling, dry rot, or complete tearing of the rubber body.
• Instability: The radiator or intercooler exhibits excessive play and can be shifted easily by hand.
• Abnormal Noises: Metallic rattling or knocking from the engine bay, particularly on rough roads or at engine idle.
• Strained Connections: Weakened mounting creates excess stress on cooling hoses and pipe couplings, potentially leading to fluid or boost leaks.

To ensure the reliable operation of the cooling system, it is recommended to inspect the condition of the mounting rubbers periodically and replace any worn or damaged bushings promptly with genuine OEM parts.