Belt Drive Idler Pulley. Accessory Drive Belt Idler Pulley. Grooved Pulley. 231170, 36177, 49165, 580167, 8074, 89170, 900249, ALT04087, ALT04170. Part Numbers. To confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in theCompatibility Table.
