Genuine OEM Jaguar Coolant Expansion Tank, part number CCC3699. This vital component is responsible for holding excess engine coolant and accommodating its expansion and contraction due to temperature changes. It helps maintain proper pressure within the cooling system and ensures a consistent coolant level. Constructed from durable metal, this expansion tank weighs 1.212 kg and includes the pressure cap. Using a genuine OEM expansion tank guarantees correct system integration, material compatibility with coolant, and reliable performance under varying engine temperatures.