engineSerpentine Belt Torque Specsfor 2012 BMW 528i 2.0L I4 Turbo N20 · RWDUnitslb-ftNm2 fastenersSeqComponentTorqueAngle—Belt Tensioner Bolt41 lb-ft · 55 Nm——Idler Pulley Bolt33 lb-ft · 45 Nm—📝 Suggest a correction to this torque spec