You should be careful at choosing liquids for Citroen especially for vehicles having 1.4 motor. To maintain cooling system you need 4.8 liters of Green coolant. It’s better to choose fluid in combination of 1991 year, 1.0 volume of motor and engine code of C3A. Otherwise AX made in 1989 won’t serve you long enough. Only exact type of antifreeze will suit Citroen AX cooling system.
Every Citroen owner should remember that engines with code C3A are quite demanding. There is a big plus in servicing 1993 Citroen AX with all regulations. Better buy 4.8 liters of good antifreeze in Red color. Produced in 1990 the 1.1 engine in AX model will serve longer by this.