Vehicle heater

A vehicle heater comprising:

• a housing with a circumferential wall defining a combustion air flow space, the circumferential wall having a fuel feed line passage opening;
• a combustion chamber assembly unit to be fed with fuel and combustion air;
• a fuel feed line adjoining the combustion chamber assembly unit and configured to feed fuel to the combustion chamber assembly unit, wherein the fuel feed line comprises a combustion chamber assembly unit connection end area, adjoining the combustion chamber assembly unit, an external connection end area, located outside the circumferential wall, and a line area extending between the combustion chamber assembly unit connection end area and the external connection end area and passing through the fuel feed line passage opening;
• and
• a sealing formation comprising a sealing formation area, wherein:
• the sealing formation area is positioned meshing with the fuel feed line passage opening providing an essentially fluid-tight closure between the circumferential wall and the line area of the fuel feed line;
• the sealing formation has, in the sealing formation area, a sealing formation passage opening through which the line area of the fuel feed line passes;
• the fuel feed line has a larger cross-sectional dimension in a throughput length area passing through the sealing formation passage opening in the sealing formation area than in a section of the line area;
• and
• said section of the line area is located between the throughput length area and the external connection area.