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Home >> BMW >> 2004 >> 545i Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Management - Overview >> E60 Engine management >> Ms45.1 >> Emissions Management - M54B25 / M54B30 Ultra Low Emission Vehicle II (ULEV II) >> Valves For Ventilation And Venting >> Pressure Relief Valve

Pressure Relief Valve

Any damage to the vent lines or the activated carbon filter may result in a pressure increase in the fuel tank. To prevent such a pressure increase, the filler cap incorporates a 300 mbar pressure relief valve.