Check winding resistance and insulation resistance.
For ignition coils type 27.3705, the resistance of the primary winding at 25°C should be (0,45± 0,05) Ohm, and the secondary winding (5±0,5) kOhm For the ignition coil 8352.12, the resistance of the primary winding is (0,42±0,05) Ohm, and the secondary winding (5±1) kOhm
Insulation resistance on «mass» must be at least 50 MΩ.