The QC Charge Coolant Delete prevents inevitable damage to Tesla Large Drive Units (“LDU”, formerly the “570A” motor) caused by leaking rotor seals found in the Tesla Model S, Tesla Model X, Toyota Rav4 EV, and Mercedes B-Class.
This common failure allows coolant to enter the rotor, which can short-circuit the stator (field windings), cause the rotor to seize and rust, and completely destroy the inverter electronics.
After rebuilding hundreds of Tesla Large Drive Units, QC Charge developed the Coolant Delete to permanently eliminate this failure mode. The system works on the same principle Tesla later adopted to address this issue in newer LDUs.
Importantly, all QC Charge Coolant Delete configurations preserve the factory coolant pathway to ensure proper cooling of the gear set and inverter chiller plates, something many competing solutions do not retain.
Available Options
Coolant Delete Lite
Removes coolant flow to the rotor entirely
Prevents coolant-related rotor seal failure and associated damage
Maintains cooling to the gear set and inverter via the factory coolant loop
Ideal for standard applications seeking maximum reliability with minimal complexity
Coolant Delete Performance (Oil-Capable)
Includes all functionality of the Lite version (no coolant to rotor)
Adds the ability to run oil cooling in the rotor (optional)
Supports use of Dexron VI or 212B gearbox oil for rotor cooling (additional parts required)
In the event of a seal leak, oil will not damage the stator, rotor, or inverter
Designed for high-performance or demanding LDU applications
Both options permanently eliminate the root cause of LDU failure while maintaining proper cooling where it’s needed most.
For the following vehicles
2012-2014 Tesla Model S (all)
https://youtu.be/qL1Dhv0WD30
2015-2020 Tesla Model S and X, Performance versions only, rear drive motor only
https://youtu.be/qL1Dhv0WD30
2014-2017 MERCEDES B-Class ED / B250e (all)
https://youtu.be/txD7u2DKanE
2012-2014 Toyota RAV4 EV (all)
https://youtu.be/XfncTZcsSHM
Installation Service
We also offer installation on Tesla Model S and X vehicles for $2,299, which includes a QCCharge Coolant Delete Lite Manifold (add $100 for Performance option), new ATF fluid, replacement of worn axle seals, and a coolant purge and top-off. Typical turnaround: Drop-off early morning → Pickup early afternoon the next day.
Contact us today to schedule an appointment.
The QC Charge Coolant Delete prevents inevitable damage to Tesla Large Drive Units (“LDU”, formerly the “570A” motor) caused by leaking rotor seals found in the Tesla Model S, Tesla Model X, Toyota Rav4 EV, and Mercedes B-Class.
This common failure allows coolant to enter the rotor, which can short-circuit the stator (field windings), cause the rotor to seize and rust, and completely destroy the inverter electronics.
After rebuilding hundreds of Tesla Large Drive Units, QC Charge developed the Coolant Delete to permanently eliminate this failure mode. The system works on the same principle Tesla later adopted to address this issue in newer LDUs.
Importantly, all QC Charge Coolant Delete configurations preserve the factory coolant pathway to ensure proper cooling of the gear set and inverter chiller plates, something many competing solutions do not retain.
Available Options
Coolant Delete Lite
Removes coolant flow to the rotor entirely
Prevents coolant-related rotor seal failure and associated damage
Maintains cooling to the gear set and inverter via the factory coolant loop
Ideal for standard applications seeking maximum reliability with minimal complexity
Coolant Delete Performance (Oil-Capable)
Includes all functionality of the Lite version (no coolant to rotor)
Adds the ability to run oil cooling in the rotor (optional)
Supports use of Dexron VI or 212B gearbox oil for rotor cooling (additional parts required)
In the event of a seal leak, oil will not damage the stator, rotor, or inverter
Designed for high-performance or demanding LDU applications
Both options permanently eliminate the root cause of LDU failure while maintaining proper cooling where it’s needed most.
For the following vehicles
2012-2014 Tesla Model S (all)
https://youtu.be/qL1Dhv0WD30
2015-2020 Tesla Model S and X, Performance versions only, rear drive motor only
https://youtu.be/qL1Dhv0WD30
2014-2017 MERCEDES B-Class ED / B250e (all)
https://youtu.be/txD7u2DKanE
2012-2014 Toyota RAV4 EV (all)
https://youtu.be/XfncTZcsSHM
Installation Service
We also offer installation on Tesla Model S and X vehicles for $2,299, which includes a QCCharge Coolant Delete Lite Manifold (add $100 for Performance option), new ATF fluid, replacement of worn axle seals, and a coolant purge and top-off. Typical turnaround: Drop-off early morning → Pickup early afternoon the next day.
Contact us today to schedule an appointment.
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