VW Audi 1.9 TDI EGR Cooler 038131521BL. OEM-grade EGR cooler for VW and Audi 1.9L TDI engines (AGR/AHF/ASV). Replaces 038131521BL and 038131521BN. Fits VW Golf IV, Passat B5, Audi A4 B5, and Skoda ... Request a Quote for Europe — send your OE number, quantity and destination country for a trade price.