NISSAN 21334-02N00 O-Ring

The genuine NISSAN 21334-02N00 part is a premium-quality O-ring (Ring Rubber) manufactured according to factory specifications. This sealing component plays a critical role in providing leak-free sealing for various vehicle fluid and air circuits, ensuring optimal system pressure and efficiency.

Function and Importance

O-rings are among the simplest yet most reliable sealing solutions in the automotive industry. Their purpose is to prevent leaks of engine oil, coolant, fuel, or air at connection points. Genuine Nissan O-rings are made from specialized elastomer materials resistant to high temperatures, the chemical effects of automotive fluids, and continuous pressure fluctuations.

Technical Specifications

• Manufacturer: NISSAN (Genuine OEM part)
• Part Number: 21334-02N00
• Part Type: O-Ring / Sealing Ring (Ring Rubber)
• Material: High-grade, heat- and oil-resistant elastomer (NBR or FKM/Viton according to factory specifications)
• Application Area: Sealing for engine block, cooling system, oil filter housing, or other auxiliary components

Signs and Consequences of Wear

Over time, O-rings can lose their elasticity, become brittle, crack, or deform due to thermal stress and chemical exposure. Typical symptoms of failure include:

• Visible fluid leaks (oil, coolant, or fuel) at connection points.
• Pressure drop in the affected system.
• Air ingress into sealed systems (e.g., fuel or vacuum systems), which can cause rough engine operation or reduced performance.

To prevent leaks and ensure reliable engine operation, replacing O-rings with new, genuine-quality parts is always recommended whenever connections are disassembled.