MG MG ZS 180 Saloon Petrol 07/2001 04/2005 FWD 24 177 130. MG MG ZS Hatchback 180 Hatchback Petrol 07/2001 10/2005 FWD 24 177 130. Type Catalytic Converter. It works by converting exhaust emissions into less harmful ones when the gasses pass through it, triggering a chemical reaction.