Genuine OEM Jaguar Cylinder Block Sealing Plug, part number AJ811931. This plug is crucial for sealing specific openings within the engine's cylinder block, preventing oil or coolant leaks and maintaining engine integrity. It is installed directly into the cylinder block. Weighing approximately 0.02 kg, this small but vital component ensures a tight, reliable seal. Using a genuine OEM sealing plug guarantees the correct material composition and precise dimensions for a leak-free and durable engine repair.