The locking plate for the pinion nut is used in Citroën models 11CV and 15CV. It serves to keep the pinion nut in place and prevent unwanted movement. This small but essential component ensures the vehicle's drivetrain continues to operate smoothly and safely. Made from durable material, it resists wear and provides reliable grip on the nut, preserving the integrity of the drivetrain. Replacing a worn locking plate is crucial for the optimal performance and safety of older Citroën vehicles.