BMW N54/N55 Electric Water Pump Replacement DIY

Signs of N55 Water Pump Failure:

• Engine overheating significantly – usually rapid over-heating once the pump fails
• Cooling Fan running full speed (noisy)
• Coolant boiling out of coolant cap

N55 CEL Codes for Failing Water Pump:

• 2E81, 2E82, 2E83, 2E84, 2E85
• 377A
• Remember to check fuses

Replacement Part

Water Pump for E-series N55 – $389

Water Pump for F-Series N55 – $449