Tinted Sunstrips & Your MOT: The UK Lowdown

Adding a sunstrip to your vehicle's windscreen is a popular modification, offering a touch of style and practical glare reduction. However, a common question that plagues many UK drivers is: will a tinted sunstrip cause my car to fail its MOT? The answer, like many things in automotive regulations, isn't a simple 'yes' or 'no' but rather a nuanced understanding of specific rules and how they're interpreted by different authorities. Navigating the regulations surrounding windscreen modifications can be a minefield, but understanding the core principles will help you stay on the right side of the law and ensure your vehicle remains roadworthy.

The primary concern when it comes to any windscreen modification, including sunstrips, revolves around driver visibility. The law is designed to ensure that a driver has an unobstructed view of the road ahead, crucial for safe driving. This principle forms the bedrock of MOT testing and police enforcement regarding windscreen tints and obstructions. It's not just about aesthetics; it's about safety. So, let's delve into the specifics of how sunstrips are viewed under UK law and during the annual MOT test.

The MOT Test and Windscreen Obstructions

When your vehicle undergoes its annual MOT, the examiner's primary focus regarding the windscreen is the driver's field of vision. The regulations are quite clear: the area of the windscreen that is swept by the wipers, often referred to as the 'swept area', must be clear of any obstruction that would seriously obscure the driver's view of the road. This applies to damage, stickers, and, crucially, sunstrips.

For a sunstrip, whether solid coloured or tinted, the critical factor for an MOT pass or fail is its positioning relative to this swept area. If any part of the sunstrip extends into the swept area and, in the examiner's judgment, constitutes an obstruction to the driver's view, it will result in an MOT failure. It's important to note that the MOT test does not involve the use of light meters to measure the exact percentage of light transmission through a sunstrip. Instead, the assessment is based on a visual inspection by the examiner regarding visibility. This means a sunstrip that is extremely dark, even if technically just outside the swept area, might still be scrutinised if it significantly impairs visibility through the upper part of the windscreen.

The Driver and Vehicle Standards Agency (DVSA) guidelines for MOT testers state that the windscreen must be free from damage or obstruction that would seriously obscure the driver's view. While they don't specifically measure the tint on a sunstrip, if the sunstrip's tint is so dark that it effectively acts like a solid obstruction within the critical viewing area, it would likely lead to a failure. The general rule of thumb for sunstrips is that they should not extend more than 150mm (approximately 6 inches) down from the top of the windscreen, or below the 'A' mark if your vehicle has one, and certainly not into the area swept by the wipers. If your sunstrip adheres to these guidelines and doesn't impede your view, it typically won't be an issue for the MOT.

Distinguishing Solid vs. Tinted Sunstrips for MOT

The distinction between a solid colour sunstrip and a tinted one, as mentioned in your query, is interesting. For the MOT, the key is the *obstruction* itself. If a solid, opaque sunstrip enters the swept area, it's an obvious obstruction and will fail. If a tinted sunstrip enters the swept area, it's also an obstruction, albeit one that allows some light through. However, if that light transmission is so low that it effectively renders that part of the windscreen unusable for vision, it would still be considered an obstruction and fail the MOT. The lack of a light meter at the MOT station for sunstrips specifically doesn't provide a loophole if the sunstrip clearly impedes vision in the critical zone.

Therefore, while the MOT tester won't whip out a fancy light meter for your sunstrip, their professional judgment on whether it obstructs your view in the swept area is paramount. It’s always best to err on the side of caution. Ensure your sunstrip is positioned high enough that it does not enter the area cleared by your wipers.

Police and VOSA Enforcement: Beyond the MOT

Here's where the plot thickens, and the distinction between MOT assessment and roadside enforcement becomes crucial. While MOT stations don't typically use light meters for sunstrips, the police and Vehicle and Operator Services Agency (VOSA), now part of the DVSA, are equipped to do so and have different criteria they can enforce.

The law regarding windscreen tint is quite strict in the UK. For the front windscreen, the light must be able to pass through by at least 75%. For the front side windows (those on either side of the driver), the light transmission must be at least 70%. If your sunstrip is so dark that it causes the overall light transmission through the windscreen to fall below 75% in any part of the critical viewing area, or if it's deemed to obscure your view significantly, you could be in trouble if stopped by the police or VOSA.

They possess calibrated light meters and can conduct roadside checks. If your sunstrip is found to be too dark or positioned illegally, you could face immediate consequences. These can range from a fixed penalty notice, points on your licence, or even a prohibition notice, meaning your vehicle is deemed unroadworthy until the tint is removed. In more severe cases, or if you refuse to comply, you could face a court summons and a much larger fine. The 'luck' factor you mentioned is precisely that – relying on not being caught. It's a gamble with potentially significant repercussions for both your driving record and your wallet.

Consequences of Non-Compliance

The penalties for having illegal window tints or obstructions can be severe. If caught, you could receive:

• A 'prohibition notice' preventing you from using your vehicle on the road until the sunstrip is removed.
• A 'fix-it ticket' requiring you to remove the sunstrip and prove compliance.
• A fixed penalty notice (FPN) and points on your driving licence.
• In extreme cases, a court summons and a fine of up to £2,500.

It's clear that while the MOT test has specific parameters for sunstrips, the broader legal framework around vehicle visibility is enforced rigorously by the police and DVSA. Therefore, compliance isn't just about passing the MOT; it's about adhering to the law at all times.

Practical Advice for Sunstrip Installation

Given the complexities, what's the best approach to ensure your sunstrip is legal and safe? Here are some practical tips:

1. Measure Carefully: Before applying, measure 150mm (approximately 6 inches) down from the top of your windscreen. This is generally the maximum permissible depth. Many vehicles also have a small 'A' mark on the windscreen, which indicates the maximum depth for a factory-fitted tint band. Your sunstrip should not extend below this mark or the 150mm guideline.
2. Avoid the Swept Area: This is the golden rule for MOT. Ensure no part of your sunstrip interferes with the area cleared by your windscreen wipers. Sit in your driving position and visually assess the area.
3. Consider Light Transmission: If opting for a tinted sunstrip, choose one that isn't excessively dark. While not measured by the MOT, a very dark tint could still be deemed an obstruction by an MOT tester or, more critically, by roadside enforcement with a meter. Aim for a tint that offers glare reduction without significantly impeding visibility.
4. Professional Installation: If in doubt, have a professional install your sunstrip. They are typically aware of the legal requirements and can ensure correct placement.
5. Don't Shorten Wipers: The idea of shortening your wipers to avoid them crossing the sunstrip is highly inadvisable. This compromises the effectiveness of your wipers, reducing your visibility in adverse weather conditions, which is a significant safety hazard and could lead to further legal issues. Windscreen wipers are designed to clear a specific area for optimal vision, and altering them could render your vehicle unroadworthy for safety reasons, regardless of the sunstrip.

MOT vs. Police/VOSA Enforcement: A Comparison

Frequently Asked Questions About Sunstrips

Let's address some common queries that drivers have regarding sunstrips and their legality in the UK.

Q: Can a sunstrip be too wide?

A: Yes, absolutely. The width of the sunstrip (meaning how far it extends down the windscreen) is the most critical factor. As mentioned, the general guideline is not to exceed 150mm from the top or go below the 'A' mark if present. More importantly, it must not enter the area swept by the windscreen wipers. If it's too wide, it will obscure your view and likely fail an MOT, and could lead to issues with the police.

Q: What about factory-fitted tinted bands on windscreens? Are they legal?

A: Yes, factory-fitted tinted bands are legal. These are designed and manufactured to comply with all relevant safety and visibility regulations. They are typically positioned correctly and have an appropriate level of tint that does not compromise the driver's view or the overall windscreen light transmission requirements. They often serve as a benchmark for where aftermarket sunstrips should be positioned.

Q: Does the colour of a solid sunstrip matter for the MOT?

A: For the MOT, the colour of a solid sunstrip is less important than its placement. If a solid sunstrip, regardless of colour, enters the swept area of the wipers and obstructs the driver's view, it will fail. The issue is the obstruction, not the specific hue.

Q: Can I remove my sunstrip for the MOT and then put it back on?

A: While technically you could do this, it's highly unadvisable and defeats the purpose of the MOT, which is to ensure your car is roadworthy at all times. If you put it back on and it's illegal, you're still liable for enforcement by the police or VOSA. It's far better to ensure your sunstrip is compliant year-round than to engage in temporary removal for the test. Plus, constantly applying and removing can damage the windscreen or the sunstrip itself.

Q: Is there a specific legal dimension for sunstrips?

A: The law doesn't specify an exact dimension in millimetres for sunstrips. Instead, it focuses on the principle of 'unobstructed view'. The 150mm guideline and the 'A' mark are common practical interpretations of this principle for aftermarket applications. The key is that it must not obstruct the driver's view in the swept area and must not cause the overall windscreen light transmission to fall below the legal 75% threshold when considering the full windscreen.

Conclusion

In summary, while an MOT station may not possess a light meter to precisely measure the tint percentage of your sunstrip, it absolutely *can* fail your MOT if it obstructs your view within the windscreen's swept area, regardless of whether it's solid or tinted. The MOT is primarily concerned with visible obstructions. However, the police and VOSA *do* have the equipment and authority to measure the light transmission of your windscreen, including any sunstrip, and can penalise you if it falls below the legal limits. Therefore, the 'luck' factor is not something to rely upon.

To ensure your vehicle remains compliant and safe, always ensure your sunstrip is positioned correctly, staying above the wiper blades' swept area and ideally no more than 150mm deep from the top of the windscreen. Opt for a tint that provides glare reduction without severely impeding visibility. Adhering to these guidelines will help you avoid the inconvenience of an MOT failure and the potential legal ramifications of a roadside stop, ensuring you can enjoy your modified vehicle with peace of mind.

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