Windscreen wipers wear out faster than most people expect, and a worn blade leaves streaks or skips across the glass instead of clearing it cleanly

You can replace your wipers yourself in under five minutes with no tools beyond what comes in the package. The blades sit on metal arms that lift away from the windscreen, and new ones slide or clip into place depending on your car's design. Most people pay a garage £15 to £40 for a job that costs £8 to £20 in parts and takes longer to drive to the garage than to do at home.

Wipers typically last between six months and two years depending on weather, how often you use them, and whether you leave them on the windscreen during frost or snow. If your wipers are streaking, chattering, or leaving dry patches, they need replacing. Waiting until they fail completely means driving in rain without visibility, which is both illegal and dangerous.

Key Takeaways

  • Windscreen wiper blades slide or clip onto metal arms that lift away from the windscreen—no tools needed to remove or fit them.
  • You need to know your wiper blade length, which you can find in your owner's manual, on the old blade itself, or by measuring the rubber strip.
  • Driver and passenger sides often use different lengths, so check both before you buy replacements.
  • New blades cost between £8 and £20 per side and last six months to two years depending on weather and use.
  • If the metal arm is bent or the connector is cracked, the arm itself needs replacing—blades alone will not fix the problem.

Finding the right blade size for your car

Your owner's manual lists the exact blade length for both the driver and passenger sides. If you do not have the manual, open your bonnet and look at the blade itself—most have the size printed or moulded into the rubber or plastic backing. Sizes in the UK are measured in inches: common sizes are 22 inches for the driver side and 20 inches for the passenger side, but this varies by model.

If the old blade is too worn to read, measure the rubber strip from end to end with a tape measure. Take that measurement to a motor factors shop or an online retailer, and tell them your car's make, model, and year—they will confirm the correct size. Buying the wrong length means the blade either does not reach the edge of the windscreen or overhangs and catches on the frame.

How to remove the old blade

Lift the wiper arm away from the windscreen by hand—it will stand up at a right angle. Look where the blade connects to the arm: there is either a small clip or a slot. If there is a clip, press it inward and the blade slides out. If there is a slot, the blade slides sideways out of the connector.

Do not force it. If the blade does not move smoothly, check that you are pushing or pulling in the right direction. Once the old blade is off, lower the arm gently back onto the windscreen so it does not bang against the glass.

Fitting the new blade

Lift the arm again and slide or clip the new blade into place. Push it firmly until you hear or feel it click or lock. The blade should sit flat against the arm with no gaps or loose movement. Lower the arm back down and test the wipers by turning on the ignition and running them through a full cycle—they should sweep smoothly across the glass without chattering or skipping.

If the new blade chatters or leaves streaks on the first use, lift the arm and check that the blade is seated properly in the connector. Sometimes a blade needs to be pushed in a second time to lock fully. If it still does not work after that, the blade may be faulty—return it to the retailer for a replacement.

When the wiper arm itself is damaged

If the metal arm is bent, cracked, or does not hold the blade flat against the windscreen, replacing the blade alone will not fix the problem. A bent arm needs to be straightened or replaced, which usually means a garage job because the arm is bolted to the motor underneath the bonnet.

Signs of a damaged arm include the blade sitting at an angle, the arm not moving smoothly, or the blade not making contact with the glass in certain parts of the sweep. If you see any of these, have the arm inspected before you buy new blades. Replacing both the arm and blade at the same time costs more upfront but ensures the wipers work properly.

Seasonal wiper blade choices

Standard rubber blades work in most conditions but can become stiff in freezing temperatures, which reduces their ability to clear ice and frost. Winter blades have a rubber compound that stays flexible in cold weather and often include a protective cover to stop ice building up on the blade itself.

If you live in an area with harsh winters, winter blades are worth the extra cost—they typically cost £2 to £5 more per blade than standard ones. You can switch back to standard blades in spring, or use winter blades year-round if you prefer. Some people keep a spare set in the car during winter and swap them if the current blades start to freeze up.

Maintaining wipers between replacements

Wiper blades last longer if you do not leave them on the windscreen during frost or snow. Lift the arms away from the glass before a freeze so the rubber does not bond to the ice. In winter, pour warm (not boiling) water over the windscreen before you turn on the wipers—this stops the blade from tearing on frozen glass.

Clean the rubber strip occasionally with a damp cloth to remove dirt and grit, which can cause streaking. If your windscreen washer fluid is old or contaminated, it can leave residue on the blade that makes it less effective. Replace your washer fluid every few months, especially in winter when salt and dirt are on the roads.

Frequently Asked Questions

How do I know if my wipers need replacing?

If they leave streaks, skip patches of glass, chatter or vibrate, or make a squeaking noise, they need replacing. You can also look at the rubber edge—if it is cracked, split, or peeling away from the backing, the blade is worn out.

Can I replace just one wiper blade?

Yes, you can replace one side at a time. However, if both blades are old, replacing them together means they wear at the same rate and you avoid having one side clear and one side streaky. Most people replace both at the same time for consistency.

What if the new blade does not fit?

Check that you bought the correct length for that side of the car—driver and passenger sides are often different sizes. If the size is correct, the connector type may not match your car's arm. Return the blade and ask the retailer to confirm the exact model and connector type for your vehicle.

Do I need to turn off the engine before changing wipers?

It is safer to turn off the engine, but you can change them with the engine running. If the wipers are in the middle of the windscreen when you turn off the ignition, they will stay there. Lift them manually to the top of the windscreen before you start work so they are out of the way.

How much should I expect to pay for new wiper blades?

Blades typically cost £8 to £20 per side depending on the brand and type. Winter blades cost slightly more. If you fit them yourself, that is your only cost. A garage will charge £15 to £40 for labour on top of the blade cost.