The washers can't deliver enough fluid to clean the screen with the wipers. It's a Minor defect, but it's a genuine fail and it's on the list of things that catch people out — plenty of cars arrive with an empty bottle in summer.
Wording as it commonly appears on an MOT certificate: “Windscreen washer providing insufficient washer liquid”.
What does it mean?
The washers can't deliver enough fluid to clean the screen with the wipers. It's a Minor defect, but it's a genuine fail and it's on the list of things that catch people out — plenty of cars arrive with an empty bottle in summer.
How serious is it?
Usually recorded as: Minor. The tester assesses the actual vehicle on the day, so your certificate is what counts.
What normally causes it?
- An empty reservoir, which is the single most common reason
- Blocked jets, often from wax after a car wash or from frozen residue
- A failed washer pump, or a blown fuse shared with something else
- A split reservoir or a pipe knocked off behind the bumper — the bottle empties itself overnight
What a mechanic would check
Fill it, try it, and listen. Pump buzzing but nothing coming out means a blockage or a disconnected pipe; total silence means power, fuse or pump. A pin through the jet clears most blockages, and I always aim them back onto the swept area afterwards.
What might need replacing
- Screenwash
- Jet cleaning or new jets
- A washer pump
- A pipe or reservoir repair
Can you still drive it?
Fine mechanically, but a salted, filmed-up screen into low winter sun is genuinely dangerous. Keep the bottle topped up with proper screenwash, not water, so it doesn't freeze.
Repair cost
Usually free — fill the bottle. Pumps and jets are inexpensive parts if it's more than that.
Before the retest
Fit wiper blades that clear the screen in one sweep without smearing, top up the washer bottle and confirm both jets actually reach the glass. Look carefully at the area swept by the wiper in front of the driver for chips and cracks, and clear anything stuck to the screen there. Check that both door mirrors are secure and the driver can see clearly behind.
Retest rules
If the vehicle stays at the test centre for repair and is retested within 10 working days, a partial retest is often free; some items qualify for a free retest if you bring the car back by the end of the next working day. The exact conditions are set out on GOV.UK, so confirm with the test centre before you leave. A major or dangerous failure means the car cannot legally be driven away unless the previous MOT is still valid and nothing dangerous was recorded — check your certificate first.
Related help
More visibility failures · MOT failure decoder · Ask a mechanic about your certificate
This is general guidance from a UK mechanic, not a substitute for a physical inspection. Only the tester who inspected your vehicle can confirm what was recorded and why.