This thermostat housing is designed for use with Rover TF, ZR, ZS, 100, 200, 400, and 25 models.The part number is PEM10025.This component serves as a replacement for the engine cooling system to restore operating specifications.It is compatible with various vehicle configurations including Hatchback, Convertible, Coupe, Saloon, and Estate body styles across the listed model series.The unit fits engines with displacements ranging from 1.1L to 1.8L, covering production years from 1984 through 2005 depending on the specific model variant.This accessory functions to secure the thermostat and manage coolant flow within the engine assembly according to factory design requirements.