TOYOTA AYGO (_B4_) 1.0 (KGB40) Hatchback Petrol 05/2015 on FWD 12 69 51. TOYOTA AYGO (_B4_) 1.0 VVTi (KGB40) Hatchback Petrol 08/2018 on FWD 12 72 53. Type Catalytic Converter. It works by converting exhaust emissions into less harmful ones when the gasses pass through it, triggering a chemical reaction.