Model Compatibility: Fits 4M50 and 4M50T engines as a direct replacement for the thermostat component.Part Number Match: Replaces thermostat part number ME303201 used in 4M50 and 4M50T engine applications.Functional Purpose: Restores thermostat functionality for temperature regulation in 4M50 and 4M50T engines.Installation Requirement: Designed to install in the same location and orientation as the ME303201 thermostat.Application Scope: Intended for use with 4M50 and 4M50T engine models requiring thermostat ME303201.