Elring 021-997-65-45 Intercooler Hose O-Ring Seal

The Elring 021-997-65-45 is a precision-engineered profile sealing ring designed for charge air cooler (intercooler) hose connections on Mercedes-Benz diesel engines. This high-quality O-ring provides a critical seal between the intercooler and turbocharger hoses, preventing boost leaks that can reduce engine performance and fuel efficiency.

Key Specifications:

• Inside diameter: 54.9mm (2.16 inches)
• Outside diameter: 63.5mm (2.50 inches)
• Material thickness: 4.3mm
• Material: FPM (fluoride rubber) for superior heat and oil resistance
• Shape: O-Ring profile seal

Features and Benefits:

• OEM-quality replacement seal manufactured by Elring, a trusted supplier to Mercedes-Benz
• FPM rubber construction withstands high temperatures and exposure to oil and fuel
• Prevents boost pressure leaks that can trigger check engine lights and reduce power
• Direct replacement for Mercedes-Benz OEM part number A0219976545
• Precision molded for proper fit and reliable sealing

This seal is commonly used on Mercedes-Benz vehicles equipped with turbocharged diesel engines, including various Sprinter, E-Class, S-Class, ML-Class, GL-Class, and Metris models. Over time, intercooler hose O-rings can become hard and brittle from heat exposure, leading to boost leaks. Regular replacement of these seals during maintenance helps maintain proper boost pressure and engine performance.

Cross-Reference Numbers: Elring 361.960, Mercedes-Benz A0219976545, 0219976545