Wing Mirrors & MOT: Do They Pass Muster?

You've just bought a car, and the excitement is palpable. You've checked the basics, given the wing mirrors a quick glance, and thought all was well. However, as you settle into driving, you discover an issue: your left wing mirror doesn't adjust as it should. It might seem like a minor inconvenience at first, but as you recently found out on the motorway, a properly functioning mirror is absolutely critical for safe driving, especially when changing lanes. This situation raises a crucial question for any car owner in the UK: will a restricted or faulty wing mirror actually pass an MOT?

The short answer is, it depends on the severity, but more often than not, a mirror that doesn't provide an adequate view or cannot be properly adjusted will lead to an MOT failure. Let's delve into the specifics of what the MOT test requires for your vehicle's mirrors, why their functionality is paramount, and what steps you can take if you suspect an issue.

The Critical Role of Wing Mirrors in Road Safety

Wing mirrors, along with your rearview mirror, are your eyes on the road around you. They provide vital information about traffic approaching from behind and to the sides, helping you make safe decisions when changing lanes, turning, or reversing. Without properly functioning mirrors, you're essentially driving with significant blind spots, dramatically increasing the risk of an accident. Even a slight restriction in movement can prevent you from achieving the optimal viewing angle, compromising your ability to react to hazards.

Understanding MOT Requirements for Vehicle Mirrors

The Ministry of Transport (MOT) test is designed to ensure that vehicles on UK roads meet minimum safety and environmental standards. When it comes to mirrors, the MOT test is quite specific about their presence, condition, and functionality. It's not just about having mirrors; it's about having mirrors that work correctly and provide a clear, unobstructed view.

Number of Mirrors Required

For most passenger cars (Class 3, 4, 5, and 7 vehicles), the requirements vary slightly based on the vehicle's age:

• Vehicles first used before 1 August 1978: Must have at least one mirror that provides an adequate view to the rear.
• Vehicles first used on or after 1 August 1978: Must have at least two mirrors providing an adequate view to the rear. This typically means an interior rearview mirror and an offside (driver's side) wing mirror. If the interior mirror does not provide an adequate view (e.g., in a panel van where the rear window is obscured), then two exterior mirrors (offside and nearside) are required instead.

Condition of Mirrors

Mirrors must be:

• Secure: They must be firmly attached to the vehicle and not loose or vibrating excessively.
• Not Damaged: The reflective surface must not be cracked, broken, or discoloured to an extent that it significantly impairs the driver's view. Minor chips or cracks at the very edge might be acceptable if they don't obscure vision, but anything that affects the main viewing area will likely result in a fail.
• Unobscured: The mirror itself must not be obscured by stickers, dirt, or other foreign objects.

Functionality and Adjustment

This is where your specific issue comes into play. Crucially, mirrors must be:

• Adjustable: They must be capable of being adjusted to provide the driver with an adequate view of the road behind and to the side. If an electric mirror mechanism is faulty and prevents proper adjustment, or if a manual mirror is stiff and cannot be positioned correctly, it will fail the MOT.
• Provide an Adequate View: The mirror, once adjusted, must give a clear and comprehensive view of the rearward scene. If restricted movement means you cannot achieve this, even if the mirror itself isn't broken, it's a fail.

In your case, if the left wing mirror cannot be adjusted sufficiently to provide you with a proper view for safe lane changes, it would almost certainly lead to an MOT failure. The fact that it was 'okay for you' until you drove on the motorway highlights that 'okay' isn't always 'safe' or 'MOT compliant'. The MOT tester will assess if the mirror can be positioned to give the required field of vision.

Common Wing Mirror Issues and Their Implications

Wing mirrors are exposed to the elements and everyday knocks, making them susceptible to various problems. Understanding these can help you identify potential MOT failures before your test date.

Restricted or No Movement (Your Scenario)

This is a common issue, especially with electric mirrors. It could be due to:

• Motor failure: The small electric motor responsible for moving the mirror glass might have failed.
• Wiring issues: Damaged or corroded wiring can prevent power from reaching the motor or switches.
• Switch malfunction: The control switch inside the cabin might be faulty.
• Mechanical obstruction: Dirt, debris, or a previous impact might have jammed the internal mechanism.

As discussed, if this restriction prevents the mirror from being adjusted for an adequate view, it's an MOT fail.

Cracked or Smashed Glass

While a minor chip at the very edge might pass, any significant crack or smash that obstructs the driver's view will result in a failure. The mirror's primary purpose is to provide a clear reflection, and damage compromises this.

Loose or Missing Mirror

A mirror that is loose, vibrates excessively, or is missing entirely is an immediate MOT failure. It must be securely attached to the vehicle's bodywork.

Heated Mirror Malfunction

While heated mirror functionality is a convenience feature and not directly tested for the MOT, the mirror glass itself must still be clear and functional. If a non-working heating element causes the mirror to be constantly fogged or iced over in certain conditions, this could indirectly affect visibility and potentially lead to an MOT advisory or even a fail if it severely impairs vision during the test.

Power-Folding Mechanism Issues

Similar to heated mirrors, a power-folding mechanism that doesn't work isn't an MOT fail in itself, as long as the mirror can still be adjusted manually (if applicable) and remains secure in its open position during driving. However, if it prevents the mirror from deploying correctly or securing itself, it could be an issue.

Troubleshooting Common Mirror Issues

Before rushing to a garage, you can perform some basic checks:

• Check the fuse: For electric mirrors, a blown fuse can often be the culprit for complete non-functionality. Consult your car's manual for the fuse box location and relevant fuse number.
• Inspect the wiring: Look for any obvious signs of damage or corrosion, especially where the mirror connects to the door.
• Test the switch: If you have access to a multimeter, you can test the continuity of the switch. Sometimes, the switch itself is worn out.
• Manual adjustment: For restricted movement, try gently moving the mirror glass by hand (if it's designed to be adjusted manually) to see if it's merely stiff or genuinely jammed.

When to Seek Professional Help

If basic troubleshooting doesn't resolve the issue, or if you're uncomfortable attempting repairs yourself, it's always best to consult a qualified mechanic. Wing mirror repairs can range from simple part replacements (e.g., just the glass) to more complex electrical diagnostics and full mirror unit replacements. Given that your car was recently purchased from a garage, it's worth discussing the issue with them, especially if it's within a reasonable timeframe from your purchase and the fault wasn't disclosed. Consumer rights legislation might offer some protection here.

Comparative Table: Mirror Condition and MOT Outcome

To give you a clearer idea, here's a simplified table:

Frequently Asked Questions About Car Mirrors and MOT

Q: Can I drive with a cracked wing mirror?

A: Legally, you must have mirrors that provide an adequate view. If the crack significantly impairs your vision or makes the mirror unsafe (e.g., sharp edges), then no, you shouldn't drive with it. It will also fail an MOT.

Q: My car only has one wing mirror. Is that okay for the MOT?

A: For cars first used on or after 1 August 1978, you need two mirrors that provide an adequate view to the rear. This is typically an interior mirror and an offside (driver's side) wing mirror. If your interior mirror is obscured (e.g., in a van), then you'll need both offside and nearside wing mirrors. If your car is older than 1978, one mirror might suffice, but two are always safer.

Q: How much does it cost to repair a wing mirror?

A: The cost varies significantly depending on the type of mirror (manual, electric, heated, power-folding), the make and model of your car, and whether it's just the glass or the entire unit that needs replacing. Simple glass replacement might be £20-£50, while a full electric, heated, power-folding unit for a premium car could be hundreds of pounds, plus fitting costs.

Q: My electric wing mirror won't fold in. Is this an MOT failure?

A: Generally, no. The power-folding function is a convenience feature. As long as the mirror is secure in its deployed position and can be adjusted to provide a clear view, it will pass the MOT. However, it's still a fault that should be addressed for convenience and to prevent further issues.

Q: What if I just adjust my mirror as best I can for the MOT?

A: The MOT tester will assess if the mirror, once adjusted, provides an adequate view as per the regulations. If the restricted movement prevents it from being positioned correctly to give that adequate view, it will fail, regardless of your best efforts. Safety is paramount.

Conclusion

The issue with your left wing mirror's restricted movement is more than just a minor annoyance; it's a significant safety concern and a likely MOT failure. While it's frustrating to discover a fault so soon after purchasing a vehicle, addressing it promptly is essential for your safety and to ensure your car remains roadworthy and compliant with UK regulations. Don't underestimate the importance of clear, adjustable vision around your vehicle – it's fundamental to safe driving on busy UK roads. Get it checked out by a professional, and if you have any questions about the purchase, speak to the garage you bought it from.

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