A coolant connection of a heat exchanger includes at least one male connector on the side of the heat exchanger and at least one connection stem on the side of the housing. The at least one connection stem is designed on its side fluidically away from the heat exchanger for the connection of a coolant line or as part of a coolant line and on its side toward the heat exchanger as a female connector for the at least one male connector. The coolant connection provides at least two circumferential sealing areas. The coolant connector has a connecting flange enclosing radial fluid lines arranged between the sealing areas which vent to the environment. In the event of a seal failure, coolant leakage may pass through the radial fluid lines to the environment, preventing coolant from bypassing the sealing areas into and air intake tract.