The ultimate UK trailer maintenance guide
Regular trailer maintenance is essential for safe, legal, and reliable towing. Whether you use your trailer daily for work or occasionally for personal use, proper inspection and servicing reduces breakdown risk, prevents costly repairs, and helps you stay compliant with UK road laws.
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Quick answer: what should I check on my trailer before towing?
- Check tyre pressure and condition
- Inspect tread depth and look for cracks or bulges
- Confirm wheel nuts are secure
- Test all lights with engine running
- Check indicators, brake lights, fog light and reverse light
- Ensure breakaway cable is correctly attached
- Confirm hitch is securely coupled and locked
- Check load is evenly distributed and secured
- Confirm number plate is visible and correct
- Gently wiggle the plug to detect loose connections
Want the printable checklist, schedule, and logbook template? Download our trailer maintenance guide below.
Go to the guideWhy regular trailer maintenance is essential
Maintenance protects safety, supports legal compliance, and reduces unexpected downtime.
Safety
Poor maintenance increases the risk of accidents, detachment, brake failure, and lighting faults.
Legal responsibility
In the UK, drivers are responsible for ensuring their trailer is roadworthy before towing.
Cost prevention
Early identification of wear helps prevent expensive repairs and breakdown recovery.
Longevity and resale
Regular maintenance extends trailer life and improves resale value with good records.
Pre tow safety checks
Run these checks before every journey.
- Check tyre pressure and condition
- Inspect tread depth and look for cracks or bulges
- Confirm wheel nuts are secure
- Test all lights with engine running
- Check indicators, brake lights, fog light and reverse light
- Ensure breakaway cable is correctly attached
- Confirm hitch is securely coupled and locked
- Check load is evenly distributed and secured
- Confirm number plate is visible and correct
- Gently wiggle the plug to detect loose connections
Tyres, wheels and bearings
Keep tyre pressures correct for load rating and inspect bearings routinely.
Checklist
- Correct tyre pressure for load rating
- Minimum tread depth guidance
- Tyre ageing and sidewall cracking
- Wheel bearing inspection intervals
- Signs of worn bearings including noise and play
- Greasing and servicing guidance
- Axle inspection and suspension condition
Workshop note
Wheel bearings should be inspected annually, or more frequently for high use trailers.
Brakes, coupling and breakaway system
Check braking and coupling components routinely and address wear early.
What to check
- Overrun brake operation check
- Brake cable inspection for fraying or stiffness
- Handbrake function test
- Coupling head wear indicators
- Hitch locking mechanism inspection
- Inspect breakaway cable condition and confirm correct routing
Legal note
Braked trailers must have a correctly fitted and functional breakaway cable.
Lighting and electrical system
Focus on plug condition, pins, corrosion, and earth connections.
Routine checks
- Inspect plug for corrosion or bent pins
- Clean connections regularly
- Check cable strain points
- Test full lighting system before travel
- Inspect socket condition on towing vehicle
- Check for intermittent lighting faults
Common electrical faults
- Rapid flashing indicators usually caused by poor earth
- Brake lights not working due to corroded pins
- Dim lights caused by incorrect wiring or earth issues
- Reverse light faults due to damaged cable
Chassis, structure and bodywork
Inspect structural areas and moving parts and treat corrosion early.
- Inspect chassis for rust or cracks
- Treat corrosion early
- Check wooden floors for rot or softness
- Inspect aluminium panels for damage
- Check ramps, hinges and catches
- Ensure load securing points are solid
- Inspect tailboard alignment and latch security
Suggested maintenance schedule
Use this routine across the year to stay roadworthy.
Before every journey
- Tyres and pressures
- Lights and electrics
- Coupling and breakaway cable
- Load security
Every 3 to 6 months
- Inspect wheel bearings
- Lubricate moving components
- Check brake cables
- Inspect chassis for corrosion
Annually
- Full brake inspection
- Service or replace bearings if required
- Electrical system inspection
- Structural inspection
Download your free trailer maintenance guide
Download our trailer maintenance guide below. It includes a printable checklist, a suggested schedule, and a logbook template you can use to record inspections and servicing.
Frequently asked questions
How often should I service my trailer?
At least annually, or more frequently for heavy use trailers.
Do unbraked trailers require servicing?
Yes. Tyres, bearings, electrics and structure still require regular inspection.
What is the legal requirement for trailer maintenance in the UK?
Drivers are responsible for ensuring trailers are roadworthy before use.
Can I service my trailer myself?
Basic inspections can be done by owners, but braking and bearing work should be carried out correctly and safely.
Need professional trailer servicing or repairs?
If you need a safety inspection, servicing, brake work, bearings, electrics, or repairs, our workshop team can help.
This guide is intended as general information. Always check your trailer documentation and current official guidance if you are unsure.