Why Windshield Wiper Fluid Leak And How To Fix?

Contrary to common misconception, the windshield wiper fluid leak is something to worry about. It is critical for your safety to have a properly operating windshield washer system.

If there is anything unusual with the system’s features, getting that element fixed or replaced as quickly as possible is important.

This post will go through all the major issues with windshield washer fluid leaks and what you should do to fix them, so stay tuned and keep reading for more!

What Is Windshield Wiper Fluid?

Windshield Wiper Fluid Leak

Windshield wiper fluid (known as washer fluid, windshield fluid, or wiper/washer fluid) is the liquid used by your car’s wipers to clean the rear windows when traveling.

It is placed into a specific chamber beneath the hood and frequently capped with a plastic water sign.

Specially designed windshield washing liquids clean better than water and do not freeze until the temperature falls below 0 degrees C.

A second fluid reservoir may be included if the vehicle has rear wipers.

Why Does Windshield Wiper Fluid Leak?

A leaking windshield wiper fluid occurs when the reservoirs for the windshield washers are fractured or destroyed, and liquid from within begins to flow out.

The washer fluid reservoir is usually found towards the bottom of the windshield in the engine compartment.

Older vehicles frequently have a washer reservoir near the exhaust pipe; the storage fuel tank will break and drain over time due to the high temperatures.

As a result, the liquid will flow from the reservoir until it becomes empty.

Some symptoms of windshield fluid leaking include:

Fluid Leaks From Below Your Car

When the windshield washer fluid leaking from bottom happens, you can detect a light green fluid or blue liquid flowing from the undercarriage, generally adjacent to one of the rear tires.

Or, more frequently, if you previously refilled your washer fluid and they stopped spraying on the rear window, your fluid is leaking.

The washer reservoir is often mounted close to the exhaust system, so the heat from this system can create oil leaks in older vehicles.

The most typical cause of a damaged tank is the owner placing water within the system rather than pure washer fluid.

The water within the gadget will freeze if the temperature gets too low. After thawing, this makes the plastic stiffen and fracture.

No Washer Fluid Spraying Outside The Windshield

If the system is turned on and you notice the pump working, but no liquid flows out, the reservoir may be broken, and all the fluid will escape.

This is common when the windshield washer equipment is only utilized with water. Mold can develop in tanks, notably at the outlet point where the pump connects to or takes liquid out.

Unfortunately, if the major issue is mold, it cannot be removed.

In this case, you will need a professional to replace the complete windshield washer reservoir and regularly change the fluid lines.

Low Windshield Fluid

Puddles of blue or green liquid beneath your car is another symptom of the windshield washer reservoir leaking.

A leaking or broken reservoir will enable your washing machine liquid to run low or empty regularly.

If you routinely replenish your tank yet discover it getting low or requires a refill frequently, your tank may be broken and leaking.

When the tank is empty and you switch on the pump, it may burn out and must be replaced.

Cracks In The Tank

Fissures often cause fluid leakage and cannot be rectified.

Once the windshield wiper fluid reservoir becomes cracked, you must take your car to the auto repair shop; an auto repair expert will examine the tank for physical deterioration, such as fractures in the container or the supply line.

How To Fix Windshield Fluid Leak?

How To Fix Windshield Fluid Leak

Here’s something you should do to fix the wiper fluid leak problem:

Check The Level In The Washer Reservoir

The first step in ensuring that your windshield washer system is in good condition is to inspect the water level in the wiper reservoir.

If your vehicle is new, it most likely includes a built-in system to communicate the washer liquid level to the driver via the built-in diagnostic feature.

For old cars, you should examine the reservoir by opening the cap and looking for the dipstick or just peeking through the plastic reservoir and directly verifying the liquid level.

Check The Condition Of The Reservoir

While inspecting your washer’s container to ensure it is full, you should also check the tank. Due to the possibility of washer fluid freezing, the winter months can be very harsh for washer fluid reservoirs.

It is fairly unusual for the washer tank to break in extreme cold, depending on the design of the washer container and how full it is when the temperature becomes cold.

When the plastic exposes to the environment, it might grow brittle and shatter with repeated usage.

Check For Washer Reservoir Cracks

There are no decent sealants or fixes for the plastic tank.

The simplest technique to inspect for cracks is carefully filling them with water and looking for any leaks or drips.

When feeding the washer reservoirs, use a funnel since spilled washer fluid can readily hide a gradual leak.

Consequently, the best thing to do if you notice a hole in the washer fluid reservoir is to change it.

Steps To Replace The Pump

  • Loosen a screw that is anchoring the whole pot towards the frame underneath the hood.
  • Once the tub is free, gently raise it and tilt it slightly back so that any residual washing solution does not run out from the hole when the broken pump is removed.
  • Remove the cap from the pressure head. Then disconnect the fluid supply line from the pump’s side. Lift the pump up and away from the rubber seal.
  • Pull and shake off the rubber washer to take it out. Substitute with a new rubber washer and filter component by firmly inserting it back into the hole.
  • Insert the end of the new pump into the washer and put it in the rubber holder on the side of the tub. Rejoin the water supply line and lock the electrical cover back into place.
  • Reinstall the tub, taking care to route the electrical and liquid lines up front so that they don’t get snagged elsewhere. Align the screw holes, reinsert and tighten the hexagon screw to finish the reinstallation.
  • Fill the basin and run the washer to test the new motor.


To sum up, if you see any of those symptoms or warning signals of the windshield wiper fluid leak we have listed above, you should have it fixed immediately for your safety during the trip.

Thank you for reading our sharing. See you next time!

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