Is It Important to Keep Liquid in the Windshield Washer Reservoir?

Your car is equipped with a system to clean your windshield if it is dirty, called the windshield washer system. Your windshield washer system includes:

  • Windshield washer fluid reservoir
  • Washer fluid pump
  • Hoses to disperse the fluid
  • Windshield washer nozzles
  • Windshield wiper system

The purpose of washer fluid

While the washer fluid is in the reservoir to be used as it's needed, the fluid also performs another function in the reservoir. The washer fluid is a lubricant for the parts contained, including the washer fluid pump and the hoses. If there is no washer fluid in the fluid reservoir, internal parts of the pump can corrode and the plastic parts can degrade. If the washer fluid pump can’t pump with the same force or if the rubber lines dry and crack from the inside, the washer fluid system may leak, stop working effectively, or stop working completely.

Running the washer fluid pump when there is no fluid in the tank causes extra stress on the pump and will wear it out extremely quickly. If you know you are out of washer fluid, take care not to activate the windshield washers.

Most importantly, if there is no washer fluid in the windshield washer fluid reservoir, you will be unable to clean your windshield if it gets dirty. This can present a huge safety problem if you are driving in conditions where you could get mud or dirt on your windshield. The wiper blades will only smear the mud if you are unable to apply washer fluid to the glass.

Make sure to keep washer fluid in the fluid reservoir at all times.


The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Related articles

How Long Does a Windshield Washer Tubes Last?
Keeping Keeping a windshield clean is a big part of staying safe while on the roadways. Driving in icy or rainy conditions is not easy, especially if there is an issue with your washer tubes. These tubes are what helps...
How to Fill a Windshield Wiper Fluid Reservoir
Driving Driving with a dirty windshield is not only a distraction, but it can make navigating roads difficult and dangerous as well. Dirt, grime, and mud can eventually smudge your windshield so completely that it becomes impossible to drive. Keeping...
How to Replace a Windshield Wiper Switch
Car windshield wiper switches keep windshield wiper blades working effectively to keep car windshields clear.

Related questions

Wipers working intermittently.
Although the most common problem for the wipers on this vehicle is the wiper motor, I'm not quite certain this is the case for you. I believe you may have a bad ground somewhere under the dash. I would have...
Windshield wiper linkage
Hello, thank you for writing in. It is likely they were not installed correctly. It may be that they were left loose, or any number of other installation issues. Typically installing wiper blades is straight forward and easy. The best...
Front windshield wipers do not work--washers still work, fuse is good 2010 Dodge Nitro
Hi - the sudden nature of this failure would suggest a fuse or other electrical link, but you have checked the obvious. Further diagnosis is needed to determine which component in the electrical power chain (https://www.yourmechanic.com/article/the-best-tool-for-mechanics-to-diagnose-electrical-issues) has failed - switch,...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com