Introduction

Electric vehicles (EVs) may not use engine oil like traditional cars. But they still need important fluids. These fluids help with cooling, braking, and smooth operation. They protect parts and improve performance.

Many drivers think EVs are maintenance-free. This is not true. EVs depend on special fluids to stay safe and efficient. Without them, systems can overheat or fail. Learning about these fluids will save you time and money.

EVs use fluids for battery cooling, thermal management, and braking systems. Each fluid has a role in keeping your car reliable. In this guide, you will learn how these fluids work and why they matter.

What Fluids Do EVs Use?

EVs do not need engine oil like normal cars. But they still use other fluids. Coolant is used to keep the battery and motor cool. Brake fluid is needed for safe braking. Some EVs also use transmission fluid.

These fluids protect parts from damage. They help EVs run smoothly and safely. Without proper fluids, systems can overheat or fail. That is why checking and maintaining them is very important.

Battery Coolant

Battery coolant is a special fluid used in EVs. It keeps the battery at a safe temperature. When the battery gets too hot, the coolant helps cool it down. When it is too cold, the coolant helps maintain warmth.

A good coolant makes the battery last longer. It also keeps your EV safe and efficient. Without coolant, the battery can overheat and lose performance. Regular checks help avoid problems.

Transmission Fluid

Some EVs use transmission fluid. It helps moving parts work smoothly. This fluid reduces friction and wear. It also supports power delivery from the motor to the wheels.

Transmission fluid keeps the system strong and reliable. Without it, parts can overheat and get damaged. Regular checks and changes keep your EV safe.

• Reduces friction in moving parts
  
• Helps power flow smoothly
  
• Protects the system from overheating
  
• Extends the life of components

Thermal Management Fluids

Thermal management fluids are very important in EVs. They help control the temperature of the battery and motor. These fluids stop overheating and keep parts working well. Without them, the EV can lose performance or get damaged.

These fluids also protect the system in cold weather. They help the battery stay at the right temperature for driving. With good thermal fluids, your EV stays safe, efficient, and reliable in all seasons.

Fluid Type	Main Function	Why It Matters	Impact on EV
Battery Coolant	Keeps the battery cool and safe	Prevents overheating and battery damage	Longer battery life and safety
Motor Coolant	Controls motor temperature	Avoids overheating during driving	Smooth and reliable performance
Power Electronics Coolant	Manages heat in inverters and converters	Stops power electronics from failing	Protects sensitive EV components
HVAC Coolant	Maintains cabin and battery climate control	Improves comfort and battery temperature	Better driving experience
Thermal Oil (in some EVs)	Provides advanced heat transfer	Supports complex thermal management systems	High efficiency and durability

Brake Fluid

Brake fluid is an important liquid in EVs. It makes the brakes work properly. When you press the brake pedal, this fluid sends the pressure to the brake system. Without it, the brakes cannot stop the car safely.

Brake fluid also protects the brake parts from rust and damage. It must be clean and at the right level. Old or dirty fluid can reduce braking power. Checking and changing it on time keeps your EV safe on the road.

Signs Your EV Fluids Need Attention

EV fluids are important for safety and performance. But sometimes they need service or replacement. You can look for simple signs to know when it’s time.

• Strange noises from the motor or brakes
  
• Warning lights on the dashboard
  
• Overheating or poor cooling of the battery
  
• Reduced braking power or soft brake pedal
  
• Leaks or low fluid levels
  
• Strange smells, like burnt or sweet odors
  

If you notice any of these signs, check your fluids. Quick action can prevent damage and keep your EV running smoothly.

Screen Wash

Screen wash is the fluid used to clean your car’s windscreen. It helps remove dust, dirt, bugs, and road salt. With clean glass, you can see the road better and drive safely.

This fluid is stored in a small tank under the hood. It is sprayed onto the windscreen when you press the control inside the car. Using the right screen wash also stops the water from freezing in cold weather. Regular checks keep it ready whenever you need it.

What Fluids Do EVs Not Use?

EVs are different from petrol and diesel cars. They do not need engine oil. There is no fuel system, so no need for fuel additives. EVs also do not use exhaust fluids like Ad Blue.

Because EVs have fewer moving parts, they need fewer fluids overall. This makes them easier to maintain. Still, the fluids they do use are very important for safety and performance.

Conclusion

EVs use fewer fluids than regular cars, but they are still very important. Coolant, brake fluid, and other systems keep the car safe and reliable. Taking care of these fluids helps your EV run smoothly for years.

Checking fluids does not take much time. Simple care can prevent big problems later. With the right maintenance, your EV will stay strong, safe, and ready for every journey.

FAQs

1. Do EVs need engine oil?
No, EVs do not need engine oil because they don’t have traditional engines.

2. What fluids are important in EVs?
Key fluids include battery coolant, brake fluid, transmission fluid (in some EVs), and screen wash.

3. How often should I check EV fluids?
It’s best to check fluids during regular service or at least once every few months.

4. Can low fluid levels damage my EV?
Yes, low or dirty fluids can cause overheating, poor braking, or system failure.5. Are EVs cheaper to maintain than petrol cars?
Yes, because EVs use fewer fluids and have fewer moving parts, they often cost less to maintain.