The 2005-2012 SEAT LEON Genuine Thermostat Housing 03G121121D is a high-quality, performance part made of plastic, designed for easy bolt-on installation with no drilling or modifications needed. Manufactured by Seat in Germany, this thermostat housing comes with a 3-month seller warranty and a 1-month manufacturer warranty. It features an opening temperature of 87°C and includes a seal for a secure fit. This OEM part is a direct replacement with a one-to-one interchange, making it a reliable choice for maintaining the engine cooling system of your Seat Leon.