Model Compatibility: Fits vehicles equipped with the M278 engine as a direct replacement for the coolant hose assembly. Part Number Reference: Replaces part number PCH501820 in applications requiring that specific coolant hose designation. Functionality: Restores coolant flow path and thermal management function when installed per factory specifications. Application Scope: Designed for use with the M278 engine’s cooling system configuration and mounting points. Installation Requirement: Requires no modification to existing engine components or cooling system hardware for proper fit and., Manufacturer: FILWY