Component carrier for a dosing system

Component carrier (20) of a dosing system for injecting a urea solution into the exhaust gas flow (9) of an internal combustion engine for selective catalytic reduction, the dosing system being connected/connectable to a urea tank (1) from which urea solution can be taken, and the dosing system being connected/connectable to a compressed air supply (6), the dosing system having a pump (3) for delivering the urea solution and the dosing system having at least one nozzle (5) through which the urea solution can be injected into the exhaust gas flow (9) by means of compressed air, characterized in that the components (2, 3, 7, 13, 14, 51, 52) of the dosing system are mounted/can be mounted in thermal contact with the component carrier (20) on the component carrier (20) and the component carrier (20) has at least one contact region (21, 22) for producing thermal contact with a fluid with a higher temperature, especially with the coolant circuit of the internal combustion engine so that the component carrier (20) forms/can form a heat sink and is heated/can be heated so that the components (2, 3, 7, 13, 14, 51, 52) which are mounted/can be mounted on the component carrier (2) are Heated/can be heated, the pump (3) being mounted in thermal contact with the component carrier (20).