The Environmental Protection Agency (PROFEPA) of Mexico has fined Volkswagen (VW) México, local unit of the German automaker for Mex$168 million ($8.9 million) on Monday. The fine has been slapped for selling 2016 model vehicles lacking corresponding environment compliance certificate.

PROFEPA has levied the fine followed by an inspection in December. The inspection unearths that the 2016 model vehicle hasn't been certified. The 45,494 imported vehicles under penalty include Audis, Bentleys, Porsches, Seats and Volkswagens, reports Mexico News Daily.

However, counting this amount of fine is not the last word for VW. Mexican authorities are still investigating the vehicles sold between 2009 and 2015 on suspicion of software induced cheat on diesel emission test, reports The Wall Street Journal quoting attorney general's office for environmental protection.

PROFEPA has discovered in December inspection that the 2016 model vehicles lack two NOM environmental compliance certificates. One certificate establishes the maximum allowable level of total hydrocarbon, carbon monoxide, nitrogen oxide and particles from new cars' exhaust pipes. The other certificate sets the maximum allowable level of noise and the measurement methodology, according to a news published in Fox News Latino.

The imposed fine is separate from an investigation being conducted in Mexico over the VW defeat device scandal. Mexico is verifying the compliance of VW's emission certificates for diesel engine vehicles sold since 2009 with national standards. The investigation move has been declared by Environment Secretary Rafael Pacchiano in September last year.