Hybrid Inverter Coolant Pump Assembly ⚡

This electric coolant pump keeps the hybrid power electronics (inverter/converter) at a safe temperature. It circulates coolant through a dedicated loop so the system delivers stable voltage and smooth drive. Without steady cooling, heat builds fast, power drops, and the vehicle may shut down to protect itself.

How it works

The control unit commands a quiet brushless motor and changes speed by temperature and load. An internal impeller draws coolant from the inverter reservoir, pushes it through the heat exchanger, and returns it cooled. Sealed bearings and anti-vibration mounts reduce noise. Because it’s electric, flow is strong even at idle and in stop‑go traffic .

Why this part is needed

Hybrid electronics handle high current. Proper coolant flow shields IGBTs, DC/DC converter, and the electric A/C compressor. A healthy pump protects components, maintains efficiency, and prevents thermal derate on hot days or long climbs.

What happens if it’s broken ❗

Typical signs: no swirl in the inverter reservoir, harsh whine or silence, temperature warnings, reduced acceleration, “Check Hybrid System,” and limp mode. Continued driving can overheat and damage the inverter—an expensive repair. Replacing the pump early limits risk and restores reliability.

Fitment and install tips

Direct-fit, plug-and-play connectors with correct flow rate for Toyota hybrid cooling systems. Use Toyota SLLC coolant only, bleed air with the service procedure, follow the hose arrow, and confirm steady swirl after warm-up. Inspect hoses and clamps while you’re there.

Compatibility

• Auris/Hybrid
• Highlander
• Prius
• Prius A(Alpha)
• Prius V