Owning a van — whether it’s a Ford Transit Custom or a Vauxhall Vivaro — means it’s not just a vehicle, but a vital tool for your business. But come MOT time, even the most reliable workhorse can get caught out by small, avoidable issues. In this post, we’ll highlight the most common reasons vans fail their MOT — and more importantly, how to steer clear of them.
🔧 1. Faulty Lights and Indicators
One of the top causes of MOT failures is surprisingly simple: broken bulbs.
💡 Tip: Regularly check that your headlights, brake lights, indicators, and number plate lights are all working. Replacing a bulb costs a few quid — failing your MOT could cost much more.
If you’re tackling summer jobs or travelling further afield, our essential summer van checks cover lighting and other warm-weather risks that could catch you out.
🛞 2. Worn or Damaged Tyres
Underinflated, overinflated, or worn tyres are a common fail point.
🛠 Check that all tyres have at least 1.6mm tread depth (more in wet conditions), and ensure pressures match your manufacturer’s specs. Uneven wear could also signal alignment issues.
We recently covered how tyre care plays a role in maximising van fuel efficiency — saving money while boosting safety.
🔋 3. Battery and Wiring Issues
A dead battery on test day? That’s a fast track to failure.
🧰 Look out for dim lights or slow starts — these could be early signs your battery needs replacing. Damaged wiring or loose connections are also flagged in MOTs, so keep electrics in good order.
💨 4. Excessive Emissions
With ULEZ rules tightening in cities like Liverpool and Manchester, emissions testing is stricter than ever. Diesel vans are particularly vulnerable if they’ve missed services or have a faulty DPF (diesel particulate filter).
Not sure if your van’s compliant? Read our guide on ULEZ-compliant vans for 2025 to avoid surprise charges — and MOT issues.
🛑 5. Brake Problems
Brake pads that are too thin or discs that are worn or warped can easily result in a fail. Spongy brakes or pulling to one side are signs you shouldn’t ignore — for safety and MOT success.
A well-maintained braking system also improves your van’s resale value — something to consider if you’re planning to upgrade your van soon.
🪞 6. Windscreen and Mirror Damage
✅ A chipped windscreen or a cracked mirror might not seem serious, but both are common MOT fails. Any obstruction in the driver’s line of sight — even a worn-out wiper blade — could be flagged.
🧽 Keeping your van clean helps you spot issues early. Our Confessions of a Van Valeter post has practical tips (and some unforgettable horror stories).
🚐 How to MOT-Proof Your Van
Here’s a quick pre-MOT checklist:
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✅ All lights, indicators and wipers working?
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✅ Tyres above 1.6mm tread with no bulges or cuts?
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✅ No warning lights on the dashboard?
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✅ Brakes responsive with no squeaks or pulling?
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✅ Mirrors and windscreen in good condition?
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✅ Exhaust free from smoke, leaks, or rattles?
Regular servicing and maintenance are your best line of defence. At Merseyside Van Sales, many of our used vans come fully serviced and MOT-ready, saving you time, hassle, and unexpected costs.
💬 Final Word
Your van works hard — but that doesn’t mean it should scrape through its MOT. A few simple checks can help you avoid common fail points and keep your business moving without interruptions.
If your current van is giving you trouble, it might be time to make a smart switch. Browse our latest MOT-ready used vans — from ULEZ-compliant Vauxhall Vivaros to fuel-efficient Ford Transit Customs — all inspected and ready to roll.
📱 Want to stay up to date on van tips and stock arrivals? Follow us on Instagram for daily updates and behind-the-scenes content!