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Tesla Coolant Delete
Tesla Model S & Model X LDU Coolant Delete
Protect Your Large Drive Unit From Coolant Ingress
Contents
At KMC Electric, we offer a specialist LDU coolant delete service for Tesla Model S and Model X vehicles fitted with the Large Drive Unit.
This is a preventative repair designed to stop one of the most common causes of Large Drive Unit failure: coolant ingress into the motor.
Over time, the internal coolant seal within the drive unit can deteriorate. When this seal fails, coolant can pass into the motor where it should never be. If left unresolved, this can lead to corrosion, electrical insulation issues, bearing damage and ultimately expensive drive unit failure.
Our coolant delete service removes this risk by eliminating the coolant path through the vulnerable section of the motor.
What Is the LDU Coolant Issue?
The Large Drive Unit, often referred to as the LDU, is the rear motor assembly fitted to many Tesla Model S and Model X vehicles.
The original design uses a coolant circuit through part of the motor assembly. The issue is not simply that coolant is present — the problem occurs when the coolant seal fails, allowing coolant to enter the motor.
When coolant enters the motor, it can cause:
- Corrosion inside the drive unit
- Damage to internal components
- Bearing wear or noise
- High-voltage insulation faults
- Motor or inverter damage
- Complete drive unit failure
This fault often develops gradually and may not be obvious until more serious damage has already occurred.
How the Coolant Delete Works
Our LDU coolant delete service removes the coolant route through the vulnerable rotor section of the drive unit.
We fit a specialist coolant delete plate/manifold that prevents coolant from entering the motor while still allowing the drive unit to operate correctly.
This modification is designed to:
- Stop future coolant ingress
- Protect the motor from internal coolant damage
- Reduce the risk of expensive drive unit failure
- Improve long-term reliability
- Keep the vehicle on the road for longer
This is not a cosmetic upgrade — it is a practical reliability improvement for a known weakness.
Will the Motor Overheat?
This is one of the most common questions we are asked.
For normal road use, commuting and everyday driving, the motor remains safe without this internal coolant route. The coolant delete removes the problematic path that can allow coolant into the motor, but it does not remove all cooling from the drive unit system.
When driven normally, the motor is not expected to overheat as a result of this modification.
We will always advise honestly if we believe a vehicle is not suitable, but for normal Tesla Model S and Model X use, this is a proven preventative solution.
Suitable Vehicles
This service applies to Tesla Model S and Model X vehicles fitted with the Large Drive Unit.
It is particularly worth considering if:
- The vehicle is out of warranty
- The vehicle is higher mileage
- You want to prevent future LDU failure
- You are planning to keep the car long term
- You want to protect against known coolant seal failure
Why Choose KMC Electric?
At KMC Electric, we specialise in Tesla and EV diagnostics, repair and preventative maintenance.
We understand the common failure patterns on Tesla vehicles and focus on practical repairs that keep cars reliable without unnecessary replacement.
We offer:
- Independent Tesla & EV specialist support
- EV qualified since 2016
- Level 4 EV Master Technician
- Over 25 years automotive experience
- Tesla drive unit repair experience
- Honest, practical advice
- Parts and procedures selected for long-term reliability
Our mission is to make expert electric vehicle repair accessible to everyone while reducing unnecessary waste and helping EV owners keep their vehicles on the road for longer.
Book Your Coolant Delete
If you own a Tesla Model S or Model X and want to protect the Large Drive Unit from coolant seal failure, we can help.
KMC Electric – Kettering
Independent Tesla & EV Specialist
📞 01536 410142
📧 [email protected]
🌐 www.kmcelectric.co.uk
Frequently Asked Questions:
Q. What is a Tesla LDU coolant delete?
A. The LDU (Large Drive Unit) coolant delete is a preventative modification for certain Tesla Model S and Model X vehicles. It removes the coolant path that can allow coolant to enter the motor if the original internal seal fails. The aim is to reduce the risk of coolant-related drive unit damage and improve long-term reliability.
Q. Will my Tesla overheat after a coolant delete?
A. For normal road use, commuting and everyday driving, the drive unit is not expected to overheat as a result of a properly installed coolant delete. The modification is designed to eliminate a known failure point while maintaining suitable operation for typical vehicle use.
Q. How do I know if my Tesla would benefit from a coolant delete?
A. If your Model S or Model X is fitted with a Large Drive Unit, is out of warranty, has covered higher mileage, or you plan to keep the vehicle long term, a coolant delete may be worth considering. It is a preventative measure designed to help avoid one of the most common causes of LDU failure before costly damage occurs.
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