The Renault 7700035518 coolant expansion tank is a genuine OEM component designed for the cooling systems of a wide range of Renault and Claas agricultural tractors. This vital part ensures proper coolant circulation and pressure regulation, preventing engine overheating and maintaining optimal operating temperatures. Measuring 290 mm in length, 150 mm in width, and 180 mm in height, and weighing 0.4 kg, this expansion tank is a direct replacement for the original part, ensuring precise fitment and reliable performance. It is also cross-referenced as Claas part number 6005018693, confirming its compatibility and quality.