2010 Lexus HS250h. 2011 Lexus HS250h Engine: 2.4LL L4;. 2012 Lexus HS250h Engine: 2.4LL L4;. Part Type: Engine Water Pump Pulley. Oversized Pulley: No. Manufacturer: Dorman. To confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in theCompatibility Table.