BMW G30 5-Series: Early Evaporator Failure (R1234yf)

Written By Jon Ho

Why Your A/C is Failing

BMW’s G30 5 Series is a luxury masterpiece, but its A/C system has a serious flaw. Many owners report early evaporator core failures, often within 40,000 to 60,000 miles. The culprit? The highly reactive R1234yf refrigerant, which accelerates corrosion in the aluminum evaporator core.

Signs of Trouble

  • Weak cooling or complete A/C failure

  • Strong chemical smell inside the cabin

  • Foggy windshield residue from leaking refrigerant

  • Hissing noises from the dashboard

The transition to the eco-friendly refrigerant R1234yf has brought some challenges for BMW and other automakers. If you notice signs of evaporator failure, address the issue quickly to avoid potential health risks. This refrigerant requires proper evacuation using specialized equipment, so breathing it in could be hazardous.

Jon Ho
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