Catalytic Converter Type Approved fits LEXUS CT200H 1.8 11 to 14 BM 174100T510

LEXUS 174100T510, 1741037520. TOYOTA 174100T510, 1741037520. Unique approval number for each BM part number. Type Catalytic Converter. It works by converting exhaust emissions into less harmful ones when the gasses pass through it, triggering a chemical reaction.