KIA Niro: Electric Water Pump (EWP) Repair procedures


The Hybrid Power Control Unit (HPCU) uses various semiconductors that are supplied with high voltage, hence generating more heat than engine combustion devices. Overheating can decrease the efficiency of control devices, restrict proper operation and melt semiconductors in excessive heat, causing system failure. To prevent this, the hybrid system is equipped with a separate cooling system.



Electric Water Pump (EWP) Repair procedures

Electric Water Pump (EWP) Repair procedures


  1. Disconnect the negative (-) cable of the 12V battery.
  2. Remove the under cover.

    (Refer to Engine Mechanical System - "Engine Room Under Cover")

  3. Drain the coolant of hybrid motor cooling system.

    (Refer to Hybrid Motor Cooling System - "Coolant")

  4. Separate the hose (A) from the reservoir.

  1. Separate the hose (A).

  1. Disconnect the EWP connector (A) and then remove the EWP after removing the bracket (B).

Tightening torque : 9.8 - 11.8 N*m (1.0 - 1.2 kgf*m, 7.2 - 8.7 lb*ft)

  1. Separate the hoses (A, B) from the EWP.



  1. Install in the reverse order of removal.


  • Be careful not to damage other hoses nearby when tightening the clamp.
  • Install the clamp in the specified direction to prevent interference with surrounding components.
  • Refill the hybrid motor cooling system with coolant and then perform the air bleeding using the KDS.

    (Refer to Hybrid Motor Cooling System - "Coolant")

  • After installing, check for leakage of coolant or fluid from hose connection during engine start.


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