Diesel Exhaust Fluid (DEF) Filler Cap, 30003 (Discontinued)

The blue appearance of Gates Non-Locking DEF Caps clearly identifies the DEF tank filler neck, preventing frustrating and costly repairs resulting from the addition of foreign fluids to the DEF tank.Gates - Driven By Possibility Gates diesel exhaust fluid (def) filler cap's built a reputation in the automotive industry for quality and craftmanship. We manufacture diesel exhaust fluid (def) filler cap's for virtually every automobile on the road today.