A knee airbag module for restraining an occupant seated in the interior compartment of a vehicle. The module includes an inflatable airbag cushion configured to deploy to a location forward of the legs of the seated occupant, and an inflator to supply inflation gas for inflating the cushion. The module further includes a housing configured to couple to the vehicle and a cover connected to the housing. The housing includes a base, a forward side wall and a rearward side wall, which together with the cover form a compartment for housing the airbag cushion prior to deployment, as well as the inflator. A portion of the rearward side wall is inclined to guide the deploying airbag cushion in an oblique direction when breaching the housing.