The 'upper ball joint nut' for a Citroen 11CV is a crucial fastening component that secures the wheel suspension's upper ball joint. This element contributes to the vehicle's stability and safety by absorbing movements and vibrations during driving. Made from durable materials, it offers resistance to wear and rust, ensuring a longer lifespan. This nut is specifically designed for the Citroen 11CV, ensuring a perfect fit and optimal performance. Timely replacement of worn parts prevents further damage to the suspension system, maintaining the driving experience as intended.