VW Audi 1.9 TDI EGR Cooler 028131521AD. OEM-grade EGR cooler for VW and Audi 1.9L TDI engines (AHF/AGR). Replaces 028131521AD and 028131521AH. Fits VW Golf III, Passat B4, Audi A3 8L, and Seat Alha... Request a Quote for Europe — send your OE number, quantity and destination country for a trade price.