NISSAN 92474-N8210 A/C O-Ring

Genuine Nissan factory A/C O-ring (part number: 92474-N8210). This precision sealing element plays a vital role in ensuring the reliable and leak-free operation of the vehicle's air conditioning system.

Technical Characteristics and Material Composition

O-rings used in air conditioning systems must meet exceptionally strict requirements, as they are continuously exposed to refrigerant, specialized compressor oils, as well as high pressure and temperature.

• Material: High-grade HNBR (hydrogenated nitrile butadiene rubber), offering excellent resistance to R134a and R1234yf refrigerants, as well as PAG and POE lubricating oils.
• Temperature Resistance: Broad operating range, withstanding both extreme engine compartment heat and low temperatures on the cold side of the A/C system.
• Pressure Resistance: Specifically engineered to withstand the high operating pressures present in the A/C circuit.

Function and Importance

The A/C O-ring is responsible for hermetically sealing connections between lines, condenser, evaporator, compressor, and expansion valve. It prevents refrigerant loss, which would otherwise result in reduced cooling efficiency or complete system shutdown. Furthermore, it prevents moisture and contaminants from entering the system, protecting the compressor from premature failure.

Signs of Wear and Failure

Over time, rubber seals lose their elasticity, harden, or crack. Common signs of failure include:

• Decreased Cooling Performance: Due to gradual refrigerant leakage, the system cannot maintain the desired temperature.
• Oil Spots at Connections: Because compressor oil circulates alongside the refrigerant, an oily residue mixed with dust often forms at leak points.
• Frequent Cycling of the A/C Compressor: Low refrigerant pressure can trigger system protections that repeatedly cycle the compressor on and off.

Whenever any component of the A/C system is disconnected or serviced, replacement of the affected O-rings is mandatory to prevent subsequent leaks.