Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Engine Mechanical >> Cooling Fan >> Cooling System 2.0L (DPAA) >> 19 Cooling System >> Coolant Pipes >> Coolant Pipes, Removing And Installing >> COOLANT PIPE UNDER Hybrid Battery Unit -AX1-, REMOVING AND INSTALLING >> Tightening Specifications