What is an HGV MOT?
An HGV MOT (also called an annual test) is a mandatory safety inspection for all heavy goods vehicles over 3,500kg. Unlike car MOTs conducted at local garages, HGV MOTs must be carried out at DVSA-authorised testing stations (ATFs). The test ensures your vehicle meets the minimum road safety and environmental standards required by law.
HGVs require their first MOT when the vehicle is one year old, then annually thereafter. Operating without a valid MOT certificate is a serious offence that can result in fines, points on your licence, and your vehicle being taken off the road.
When is an HGV MOT Required?
- New vehicles: First MOT required one year from date of registration
- Subsequently: Annual MOT required every 12 months
- After major repairs: May require additional inspection
- Change of use: If vehicle classification changes
You can have your HGV tested up to one month before the current certificate expires without losing any validity period. This gives flexibility for scheduling tests around operational commitments.
What Does the MOT Test Cover?
The HGV MOT is a comprehensive inspection covering:
Lights and Electrical
- All lights functioning correctly
- Electrical connections secure
- Reflectors present and clean
Braking System
- Service brake efficiency (minimum 50% for rigid, 45% for articulated)
- Secondary brake efficiency (minimum 25%)
- Parking brake effectiveness
- Brake lines and connections
Steering and Suspension
- Steering mechanism wear
- Power steering operation
- Suspension components
- Wheel bearings
Chassis and Body
- Structural integrity
- No excessive corrosion
- Security of body panels
- Coupling equipment (for articulated vehicles)
Tyres and Wheels
- Tread depth (minimum 1mm across three-quarters of breadth)
- Tyre condition
- Wheel security
- Correct tyre ratings for vehicle weight
Emissions
- Diesel smoke emissions
- Exhaust system condition
- AdBlue system (where fitted)
Preparing for Your HGV MOT
Proper preparation can significantly improve your chances of passing first time:
1. Conduct a thorough pre-inspection - Walk around checking lights, tyres, mirrors, and obvious defects 2. Check brake performance - Book a rolling road test beforehand if unsure 3. Clean the vehicle - A clean truck makes inspection easier and shows professionalism 4. Ensure all lights work - Replace bulbs before the test 5. Check fluid levels - Particularly AdBlue if fitted 6. Review previous advisories - Address any items noted in previous tests 7. Ensure documentation is ready - V5C, previous MOT certificate
Many HGV repair providers offer pre-MOT inspections that can identify issues before the official test.
What Happens if You Fail?
If your HGV fails the MOT:
- Dangerous defects: Vehicle cannot be driven until repaired (except directly to a place of repair)
- Major defects: Vehicle fails but may be driven to a place of repair
- Minor defects: Certificate issued but repairs should be made
You have the right to a free partial retest within 10 working days if you return to the same testing station. For a full retest or at a different station, you'll need to pay the full fee.
Address any failed items promptly - operating with known defects can result in prohibitions and prosecution.