MOT Test Preparation: Complete Checklist

Getting your car ready for its MOT doesn't need to be stressful. With a bit of preparation, you can catch many common failure points before they cost you a re-test. Here's my comprehensive pre-MOT checklist.

Check these before your test:

• ▸Headlights (both dipped and full beam)
• ▸Sidelights
• ▸Brake lights (you'll need someone to help or use a reflection)
• ▸Indicators front and rear
• ▸Hazard warning lights
• ▸Number plate light
• ▸Rear fog light(s)

A single bulb failure is an instant MOT failure. They're cheap and easy to replace - most can be done in minutes without tools.

Tyres are one of the most common MOT failures. Check:

• ▸Tread depth: Minimum 1.6mm across the central three-quarters of the tyre
• ▸No cuts, bulges, or damage to the sidewalls
• ▸Correct pressure (check your car's handbook)
• ▸Wheel nuts all present and tight
• ▸No cracks or damage to alloy wheels

Pro tip: If your tread is close to 1.6mm, it's worth replacing before the MOT. You'll need new tyres soon anyway, and it saves a re-test.

The MOT tests:

• ▸Brake efficiency (stopping power)
• ▸Brake imbalance (brakes working evenly)
• ▸Handbrake operation and efficiency
• ▸Brake pad and disc condition (visible through wheel)

If your brakes feel spongy, make noise, or the handbrake doesn't hold on a hill, get them checked before the test.

Your MOT will fail if:

• ▸There's a chip bigger than 10mm in the driver's A-zone (directly behind the wheel)
• ▸There's a crack longer than 40mm anywhere on the windscreen
• ▸Wipers don't clear the screen effectively
• ▸Washer bottle is empty or system doesn't work

Get chips repaired before they spread - most insurance policies cover this with no excess.

You need:

• ▸Driver's side mirror in good condition
• ▸Interior mirror (or passenger mirror on van conversions)
• ▸All indicators working
• ▸No cracks or damage affecting visibility

The test includes:

• ▸Exhaust emissions levels (petrol, diesel, or hybrid)
• ▸Exhaust system security (no loose or hanging parts)
• ▸No excessive smoke
• ▸Catalytic converter present (if originally fitted)

A warning light on the dashboard for emissions will fail the MOT. Get it diagnosed first.

Check for:

• ▸Excessive play in steering wheel
• ▸Worn ball joints or track rod ends
• ▸Leaking shock absorbers
• ▸Broken springs
• ▸Worn bushes

Drive over speed bumps - if it bounces more than once or makes clunking noises, book a check before the MOT.

Your plate must:

• ▸Be clean and clearly visible
• ▸Have correct spacing and sizing
• ▸Not be damaged or faded
• ▸Be securely fixed
• ▸Comply with current regulations (no fancy fonts!)

All seat belts must:

• ▸Be present and working
• ▸Retract properly
• ▸Show no fraying or damage
• ▸Latch securely

Any warning light illuminated on the dashboard can fail the MOT, especially:

• ▸Engine management light
• ▸ABS warning light
• ▸Airbag warning light
• ▸Brake system warning light

Get these diagnosed before the test - they could indicate serious issues.

Quick checks:

• ▸Horn works and sounds appropriate
• ▸All dashboard switches and controls operate properly
• ▸Boot opens and closes securely
• ▸Bonnet release works and bonnet props hold
• ▸Fuel cap fits securely

The most common MOT failures are:

1. Lights (34% of failures) - Check everything! 2. Brakes (10% of failures) - Get spongy pedals checked 3. Suspension (9% of failures) - Listen for clunks 4. Tyres (7% of failures) - Check depth and pressure 5. Issues affecting driver's view (5%) - Chip repairs

• ▸Vehicle registration document (V5C)
• ▸Current MOT certificate if you have one
• ▸Any advisories from last year's test

I offer a pre-MOT inspection for £25, where I'll check everything on the official test. If I find issues, I can often fix them there and then, saving you a failed MOT and re-test fee.

Most importantly, I'll give you honest advice - if something will fail but you can't afford to fix it right away, I'll tell you what's critical vs what's an advisory.

A bit of preparation can save you time, money, and stress. Check these items a week before your MOT, and you'll stand the best chance of a first-time pass.