Engine Coolant Radiator Overflow Tank Breather Hose Pipe 1645000075 A1645000075 Compatible With Mercedes Benz W164 X164 GL350 GL450 GL550

This OEM-specification radiator overflow tank breather hose maintains proper coolant system pressure and prevents air locks in Mercedes-Benz GL-Class models. Engineered to withstand high-temperature coolant circulation, this hose connects the overflow reservoir to the radiator cap assembly, allowing excess coolant to return safely during thermal expansion cycles. Direct replacement for part numbers 1645000075 and A1645000075, ensuring perfect fitment on W164 and X164 chassis GL350

This precision-engineered radiator overflow tank breather hose is designed to regulate coolant system pressure and prevent vapor lock in Mercedes-Benz GL-Class vehicles. The hose facilitates proper coolant circulation between the overflow reservoir and radiator cap, accommodating thermal expansion while maintaining system integrity under demanding operating conditions. Compatible with W164 and X164 platform GL350, GL450, and GL550 models, this component matches OEM specifications for part numbers 1645000075 and A1645000075. Critical for preventing coolant loss, air entrapment, and potential engine overheating—a reliable replacement for routine maintenance or repair.