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Guangzhou Fuheng Auto Parts Supply Chain Co., Ltd.
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2016-2021 Tesla Model S & 2012-2021 Cooling Auxiliary Coolant Water Pump | 1037327-00-F
The Unsung Hero of Your Tesla’s Thermal Management
Beneath the sleek exterior of your Tesla Model S lies a critical component that keeps its high-performance systems running cool: the 1037327-00-F auxiliary coolant water pump. Designed specifically for 2016-2021 Model S variants (and backward-compatible with 2012-2021 models), this pump is the silent workhorse that circulates coolant through secondary cooling loops—ensuring your battery, motors, and electronics avoid overheating, even during spirited drives or extreme weather.
While the main cooling pump handles primary thermal regulation, this auxiliary pump steps in to manage “secondary loads”: think rapid charging sessions that spike battery temps, or sustained highway speeds that tax the motor inverters. Without it, your Model S could face reduced range, slower charging, or even system shutdowns in harsh conditions.
Key Functions: Beyond “Just Circulating Coolant”
Battery Thermal Safeguard: During DC fast charging, the pump accelerates coolant flow to dissipate heat from the battery pack, preventing overheating that would otherwise slow charging or trigger safety cutoffs.
Motor & Inverter Cooling: When pushing your Model S in Sport mode, the pump redirects coolant to the motor inverters—critical components that convert DC power to AC for the motors—keeping them within optimal operating temps (185-200°F).
Climate System Support: Works with the HVAC loop to maintain cabin temperature efficiency, even when the main pump is focused on powertrain cooling. No more sacrificing AC performance during hard drives.
Post-Shutdown Cooling: Continues running for up to 10 minutes after you turn off the car, bleeding residual heat from the battery and motors to prevent long-term thermal stress.
Signs Your Auxiliary Pump Needs Replacement
Don’t ignore these red flags—they signal a failing pump:
Overheating Alerts: “Battery Temp High” or “Motor Inverter Hot” warnings, especially during charging or high-speed driving.
Reduced Charging Speed: The car limits fast charging to 50% or less, a protective measure when the battery can’t cool properly.
Unusual Noises: A high-pitched whine or grinding sound from the front of the vehicle (near the radiator) when the car is on or charging.
HVAC Inefficiency: Cabin AC takes longer to cool, or blows warm air intermittently—often a sign the pump isn’t supporting the climate loop.
Technical Specifications (At a Glance)
Feature
Specification
Part Number
1037327-00-F
Compatibility
2016-2021 Tesla Model S; 2012-2021 Model S (backward-compatible with minor adapter)
Voltage
12V DC (integrates with vehicle’s auxiliary electrical system)
Flow Rate
15 liters per minute (LPM) at 12V (optimized for secondary cooling loops)
Material
Reinforced plastic housing with stainless steel impeller (resists corrosion)
Operating Temp Range
-40°F to 221°F (-40°C to 105°C)
Waterproof Rating
IP6K9K (dust-tight and withstands high-pressure, high-temperature water jets)
Warranty
2-year limited warranty (covers defects in materials/workmanship)
Why It Outperforms Aftermarket Alternatives
Aftermarket pumps cut corners on flow precision and durability—this one is built to Tesla’s exacting standards:
Tesla-Calibrated Flow: The impeller is engineered to match the pressure demands of Model S’s secondary cooling loops, preventing under/over-circulation that can damage components.
High-Temp Resilience: The housing uses heat-resistant polymer that won’t warp when exposed to hot coolant (up to 221°F), unlike cheap plastic pumps that crack under stress.
Quiet Operation: Equipped with a noise-dampening bearing system that operates at <45dB—so you won’t hear it over road noise or the car’s cabin.
Plug-and-Play Fit: Includes pre-wired connectors and mounting brackets that align perfectly with Model S’s cooling system. No splicing or modifications needed.
Installation & What You Get
1x Auxiliary Coolant Water Pump (1037327-00-F)
Mounting hardware (bolts, gaskets)
Digital Installation Guide: Step-by-step photos showing access points (near the front radiator) and torque specs (8 Nm for mounting bolts).
Company Profile
Guangzhou Fuheng Auto Parts Supply Chain Co., Ltd., located in the Guangzhou auto parts business district, adheres to the business philosophy of "quality first, pragmatic innovation, service-oriented, and co creation and win-win", and has estab... Company Profile
Guangzhou Fuheng Auto Parts Supply Chain Co., Ltd., located in the Guangzhou auto parts business district, adheres to the business philosophy of "quality first, pragmatic innovation, service-oriented, and co creation and win-win", and has estab...
