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Whether you’re commuting, driving between bases, or heading home on leave, a vehicle breakdown can happen at any time – day or night, weekday or weekend. While there’s never a good time for your car to stop working, understanding the most common reasons can help you prepare, prevent issues, and get back on the road faster.
This guide highlights the top causes of breakdowns in the UK and simple steps to reduce the risks – useful for anyone in the Armed Forces community who relies on their car.
1. Flat or Faulty Batteries
One of the leading causes of car breakdowns in the UK is a flat or failing battery.
Causes:
- Ageing batteries (typically after 3-5 years)
- Short, infrequent journeys that don’t fully recharge the battery – common for drivers using their car mainly for base-to-home trips
Prevention Tips:
- Recharge your battery overnight every few weeks if your journeys are short
- Replace the battery every 3-5 years, depending on usage
2. Alternator Failures
The alternator recharges your battery and powers essential electrical systems.
Warning Signs:
- Flickering battery light
- Dim headlights
- Slower-than-normal windscreen wipers
Alternators can’t be maintained, but spotting problems early can save you from being stranded.
3. Starter Motor Problems
The starter motor draws power from the battery to start your car.
Prevention:
While there’s little you can do to avoid starter motor wear, regular servicing helps catch issues before they worsen – especially before long journeys or deployments.
4. Tyre and Wheel Damage
Punctures, blowouts, or other tyre damage are common on UK roads.
Prevention Tips:
- Check tyre pressure and tread depth regularly (especially before long journeys)
- Carry a spare wheel or puncture repair kit
- Ensure tyres always meet MOT standards
5. Misfuelling
Thousands of UK drivers each year put the wrong fuel in their car – most often petrol into diesel, as the nozzle fits easily into a diesel filler neck.
If you misfuel:
- Do not start the car
- Don’t turn the ignition (this primes the fuel pump)
- Call your breakdown provider or garage for specialist help
6. Electrical System Faults
Modern cars have increasingly complex electrics – faults can affect everything from headlights to infotainment.
Tip: Other than replacing bulbs, leave electrical issues to a qualified mechanic who can run diagnostics safely.
7. Low Oil Levels
Running with low oil can cause severe engine damage, even complete failure.
Prevention Tips:
- Don’t rely solely on the oil warning light
- Check oil levels regularly with the dipstick
8. Lost or Locked-In Keys
Lost keys or being locked out is a frequent issue. Many modern keys contain chips, making them secure but harder to replace.
Prevention Tip:
- Keep a spare key at home or with a trusted family member while you’re away on duty. Alternatively, if stranded call your breakdown provider or special locksmith.
Breakdown cover that keeps you moving from £61.60 per year.
Provided by ERS, Forces Mutual Rescue unlike the AA or RAC, doesn’t have a fleet of branded vans, but utilises UK wide recovery specialists to rescue you 24/7 when your car breaks down.
UK cover comes with:
- Misfuelling cover
- Lost keys and lock assistance
- Home assistance
- Onward travel provision should your car not be repairable
Terms & Conditions apply.
For full policy cover details including any exclusions, please call 0151 363 5290 or visit our website
Forces Mutual Rescue (Breakdown Cover) is provided by ERS (Syndicate 218 at Lloyds).
For your security, all telephone calls are recorded and may be monitored.






