Flensburg, 8. August 2013. As a national product safety authority, the KBA is obliged to follow up information regarding products which may not be safe. The KBA has met with this obligation in the context of the use of the refrigerant R1234yf in vehicle air conditioning systems. Enquiries with the responsible vehicle manufacturers resulted in a very uneven picture regarding their risk assessment. Because of this, a neutral risk assessment by the KBA was impossible.