Coolant Pump – 1041151-00-E

HV Battery Coolant Pump — 1041151-00-E

The Tesla Model 3 uses one or more electric coolant pumps mounted at the supermanifold to circulate coolant through the high-voltage (HV) battery loop. This OEM HV battery coolant pump keeps the pack in its optimal temperature range for performance, fast charging, and long-term life. A weak or seized pump can cause overheat warnings, reduced power, no cabin heat on heat-pump cars, and fault codes in the thermal system.

Why these pumps fail

• Coolant leaks — Small leaks at hoses, O-rings, or the supermanifold let the pump run low on coolant until it overheats and seizes.
• Running dry — If the system is not properly vacuum-filled or bled, trapped air can cause the electric pump to cavitate and overheat.
• Age and contamination — Old or contaminated coolant accelerates internal wear and can load the pump bearings and impeller.
• Thermal system faults ignored — Driving for extended periods with low coolant or repeated thermal warnings can finish off a marginal pump.

What this part does for your Model 3

• Restores HV battery cooling — Ensures proper coolant flow through the battery pack for stable temps under hard driving and DC fast charging.
• Supports heat-pump operation — On heat-pump cars, the battery loop ties into the cabin HVAC; a healthy pump helps restore cabin heat and defrost performance.
• Direct OEM replacement — Bolts directly to the supermanifold with the factory T20/T25 hardware, reuses the original electrical connector, no wiring mods.
• New sealing hardware recommended — We strongly recommend installing with new, lubricated O-rings and performing a proper vacuum refill / bleed.

Service & installation support

Replacing a Model 3 HV battery coolant pump is not a typical DIY job. The procedure involves putting the car into Service Mode, safely disconnecting LV power, removing front aero shields, and using a vacuum-fill tool to remove air from the system before refill. We recommend installation by a technician experienced with Tesla thermal systems or having the work performed at Gruber Motors.