21148725
Diesel Exhaust Fluid (DEF) Filler Cap
Volvo

The DEF filler cap provides a secure and sealed closure for the diesel exhaust fluid reservoir, preventing contamination and spillage. Its design ensures easy access for refilling while maintaining a tight seal to prevent evaporation or ingress of dirt and debris. Proper sealing of the DEF system is essential for the effective operation of emission control systems, helping to reduce harmful pollutants and meet environmental standards. The cap is constructed from corrosion-resistant materials to withstand exposure to DEF and environmental elements. Regular inspection and replacement of this cap are vital for maintaining system integrity and compliance. Source One Parts Center offers this high-quality DEF filler cap to support your vehicle’s emission management system.