Problems Caused
- Too long: Blades may clash with each other mid-sweep, causing judder and noise. They can also hit the windscreen frame/A-pillar, causing damage to the blade or trim.
- Too short: You’ll have unwiped areas at the edge of the windscreen, reducing visibility. This can also cause an MOT failure.
- Slightly too long (1 inch): May work on some cars but can cause the blade to ride up over the edge of the glass, especially on curved windscreens.
How to Fix It
The fix is simple — fit the correct size blades. Use our wiper blade finder to look up the exact sizes for your car. Most retailers accept returns on incorrectly sized blades if they’re unused.
Frequently Asked Questions
Is it safe to drive with the wrong size wipers?
If they’re clearing most of the windscreen, it’s not immediately dangerous. However, reduced visibility is a safety risk, and incorrect wipers can fail the MOT.
Can I use slightly smaller wipers?
Going 1 inch shorter usually works acceptably, though you’ll have a small unwiped strip. Going 2+ inches shorter is not recommended.
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How we check fitment for this guide
We cross-reference fitment figures against manufacturer specifications and OE-supplier catalogue data where available, and matched to the standard codes that actually govern fit — battery type/group sizes, wiper lengths and fitting types, bulb fitment codes, tyre size markings, and oil specifications. We work by make, model, year, engine, and build date, because a single model can take different parts across its life. Where the right part depends on your exact vehicle, we tell you to confirm by registration or VIN. More on our method →
Recommended Wiper Blades for Wrong
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