29/11/2016
When preparing your vehicle for its annual MOT test, it's natural to scrutinise every component, from the headlights to the tyres, ensuring everything is in tip-top condition. One question that frequently arises among UK motorists is concerning the rear windscreen wiper. Will a faulty or non-functional rear wiper lead to an MOT failure? It's a common query, and thankfully, the answer is straightforward, though it comes with an important caveat.
Let's cut straight to the chase: a rear wiper that isn't working will not cause your car to fail its MOT. Unlike the front windscreen wipers, which are absolutely critical for maintaining forward visibility and are therefore a key part of the MOT test, the rear wiper is not a testable item. This means that if your rear wiper is broken, missing, or simply not performing its function, your vehicle will still pass its MOT, provided all other testable components meet the required standards.
Understanding MOT Testable Items: Front vs. Rear
The distinction between front and rear wipers in the MOT test hinges on their perceived importance for basic road safety and legal compliance. The MOT test is primarily concerned with ensuring your vehicle is roadworthy and safe for you and other road users. Forward visibility is paramount, and as such, your front windscreen wipers must be fully functional, clear the windscreen effectively, and have an operational washer system to spray fluid onto the glass.
If your front wipers are defective, worn, or the washer jet doesn't work, this will undoubtedly result in an MOT failure. This is because impaired forward vision, especially in adverse weather conditions, significantly increases the risk of accidents. The law dictates that a driver must have a clear view of the road ahead at all times.
However, the rear wiper is viewed differently. While incredibly useful for maintaining rear visibility, particularly in rain, snow, or when reversing, it is not deemed essential for the fundamental act of driving forward safely. Many vehicles, especially older models or commercial vans, don't even have a rear wiper, and they are perfectly legal and safe to drive. Therefore, its operational status falls outside the scope of the mandatory MOT inspection criteria.
Why You Should Still Fix a Faulty Rear Wiper
Even though a broken rear wiper won't lead to an MOT failure, it is strongly recommended that you address any issues with it promptly. This isn't just about convenience; it's about enhancing your overall driving safety and the practicality of your vehicle. Here's why:
- Improved Rear Visibility: In wet weather conditions, a functioning rear wiper dramatically improves your ability to see out of the back window. Rain, road spray, and dirt can quickly obscure your view, making lane changes, reversing, and checking your blind spots far more hazardous.
- Easier Reversing and Parking: When manoeuvring in tight spaces, such as car parks or driveways, clear rear visibility is invaluable. A working rear wiper ensures you can confidently reverse without relying solely on wing mirrors, reducing the risk of minor bumps or scrapes.
- Enhanced Driving Confidence: Knowing you have a clear view in all directions contributes significantly to your driving confidence, especially in challenging conditions. This can reduce stress and allow you to react more effectively to unexpected situations on the road.
- Resale Value: While not directly related to safety, a fully functional vehicle, including all its accessories, tends to hold its value better and is more appealing to potential buyers. A non-working rear wiper, even if minor, can be a deterrent.
Common Rear Wiper Problems and Simple Troubleshooting
If your rear wiper has stopped working, it could be due to several common issues. Before considering a trip to the garage, there are a few simple checks you can perform:
- Blown Fuse: The first thing to check is the fuse box. Your car's owner's manual will have a diagram showing the location of the fuse box (often under the bonnet or in the glove compartment) and which fuse corresponds to the rear wiper motor. A blown fuse is a quick and inexpensive fix.
- Worn or Damaged Blade: While a worn blade won't stop the wiper from moving, it will significantly reduce its effectiveness, leading to streaks or missed areas. Inspect the rubber blade for cracks, tears, or hardening. Replacing the blade is a simple DIY task.
- Motor Failure: If you hear no sound when you try to activate the wiper, and the fuse is fine, the motor itself might have failed. This is a more complex repair, often requiring professional assistance.
- Wiring Issues: Damage to the wiring leading to the wiper motor can prevent it from receiving power. This can be challenging to diagnose without specialist equipment.
- Washer Jet Blockage: If the wiper works but no fluid sprays, the washer jet might be blocked. Try clearing it gently with a thin pin. Ensure your washer fluid reservoir is also topped up.
Important Tip: Always use specific windscreen washer fluid, especially during colder months, as it contains anti-freeze properties to prevent the system from freezing and potentially damaging components.
Comparison: MOT Testable Wipers vs. Non-Testable
To further clarify the MOT regulations, here's a quick comparison of how front and rear wipers are treated:
| Component | MOT Testable? | Reasoning |
|---|---|---|
| Front Windscreen Wipers | Yes | Critical for maintaining clear forward visibility and safe driving in all weather conditions. Must clear effectively and operate with washer jets. |
| Rear Windscreen Wiper | No | Not deemed essential for fundamental forward driving safety. Many vehicles do not have one fitted as standard. |
| Front Washer Jets | Yes | Essential for clearing the front windscreen in conjunction with the wipers. |
| Rear Washer Jet | No | Not a testable item for the same reasons as the rear wiper itself. |
Maintaining Your Wipers for Optimal Performance
Regardless of MOT status, regular maintenance of all your vehicle's wipers is a simple yet effective way to ensure clear visibility and extend their lifespan. Here are some tips:
- Clean Blades Regularly: Use a damp cloth to wipe down the rubber blades, removing dirt, grime, and road film. This helps prevent streaking and prolongs blade life.
- Replace Blades Annually: Wiper blades are exposed to harsh elements and wear down over time. Replace them at least once a year, or sooner if you notice streaking, chattering, or gaps in the wiped area.
- Use Quality Washer Fluid: Always use a good quality washer fluid that's appropriate for the season. Avoid using just water, as it can freeze in winter and doesn't clean as effectively.
- Clear Ice and Snow Carefully: Never use your wipers to clear heavy ice or snow from your windscreen. Always scrape it off manually first, as this can damage the wiper motor and blades.
- Check Wiper Arms: Occasionally check that the wiper arms are firmly attached and have proper tension against the windscreen.
Frequently Asked Questions About Rear Wipers and MOT
Here are some common questions drivers in the UK have about their rear wipers and the MOT:
Q: If my rear wiper is completely missing, will it fail the MOT?
No, a missing rear wiper will not cause an MOT failure. As it's not a testable item, its absence does not affect the test outcome. This applies whether the car was manufactured without one or if it has been removed, provided there are no dangerous sharp edges or protrusions left behind.
Q: Is it illegal to drive with a broken rear wiper?
No, it is not illegal to drive with a broken rear wiper in the UK. However, it is highly inadvisable, especially in poor weather, due to the significant reduction in rear visibility and potential safety implications.
Q: How often should I replace my rear wiper blade?
Like front wiper blades, it's generally recommended to replace your rear wiper blade annually, or as soon as you notice a decline in its performance (e.g., streaking, chattering, or missed areas).
Q: Can I fix a rear wiper myself, or do I need a mechanic?
Simple issues like a blown fuse or a worn blade can often be fixed by yourself with basic tools and knowledge. More complex problems, such as a faulty motor or wiring issues, usually require the expertise of a qualified mechanic.
Q: Does the rear washer jet need to work for the MOT?
No, similar to the rear wiper itself, the rear washer jet is not a testable component for the MOT. Its functionality will not impact the test result.
Q: My car has a rear camera. Does this make a working rear wiper less important?
While a rear camera is a fantastic aid for reversing and parking, it doesn't entirely negate the need for a clear rear window. Cameras can get dirty, foggy, or be obscured by direct sunlight/headlights. A clear physical view through the window, supported by a working wiper, provides a more comprehensive and reliable assessment of your surroundings, especially when driving.
Conclusion: Prioritise Safety, Not Just Compliance
In summary, while a non-functional rear wiper will not lead to an MOT failure, it's a component that significantly contributes to your driving visibility and overall safety. The MOT test sets the minimum legal standard for roadworthiness, but maintaining your vehicle beyond these minimums is always a wise decision. Investing a little time or money to fix a faulty rear wiper is a small price to pay for enhanced peace of mind, improved safety, and a more comfortable driving experience, especially when navigating the unpredictable weather conditions on UK roads.
If you want to read more articles similar to Rear Wiper & MOT: Your UK Guide to Compliance, you can visit the MOT category.