Abstract: A filter assembly (1) for use in a vehicle, the filter assembly (1) including a filter (2) having a first end with a valve seat, a housing cover (3) and a valve assembly (4) including a valve member and biasing structure, wherein the filter (2) is configured to be received, in use, within a filter housing with the housing cover (3) secured to the filter housing and over the first end of the filter such that an inner surface of the housing cover engages the biasing structure and urges the valve member into sealing engagement with the valve seat of the first end of the filter (2).