This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit and function of the original part. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Lexus IS300: 2001, 2002, 2003, 2004, 2005) Trustworthy design - backed by 100 years of automotive aftermarket experience Non-Pressurized Coolant Reservoir Lexus IS300 2005-01 COOLANT RESERVOIR Direct replacement - this engine coolant reservoir matches the fit and function of the original part Ideal solution - engineered for a seamless installation Durable construction - manufactured from quality materials to withstand underhood heat and vibration Reservoir, Coolant, Recovery, Tank, Degas, Bottle, Anti-Freeze, Antifreeze