Annex 6. Vehicle maintenance, safety and security

Information and rules about vehicle maintenance, safety and security.

Vehicle maintenance

Take special care that lights, brakes, steering, exhaust system, seat belts, demisters, wipers, washers and any audible warning systems are all working. Also

  • lights, indicators, reflectors, and number plates MUST be kept clean and clear
  • windscreens and windows MUST be kept clean and free from obstructions to vision
  • lights MUST be properly adjusted to prevent dazzling other road users.
  • Extra attention needs to be paid to this if the vehicle is heavily loaded
  • exhaust emissions MUST NOT exceed prescribed levels
  • ensure your seat, seat belt, head restraint and mirrors are adjusted correctly before you drive
  • ensure that items of luggage are securely stowed.

Laws RVLR 1989 regs 23 & 27, & CUR regs 30 & 61

Warning displays. Make sure that you understand the meaning of all warning displays on the vehicle instrument panel. Do not ignore warning signs, they could indicate a dangerous fault developing.

  • When you turn the ignition key, warning lights will be illuminated but will go out when the engine starts (except the handbrake warning light). If they do not, or if they come on while you are driving, stop and investigate the problem, as you could have a serious fault.
  • If the charge warning light comes on while you are driving, it may mean that the battery isn’t charging. This should also be checked as soon as possible to avoid loss of power to lights and other electrical systems.

Window tints. You MUST NOT use a vehicle with excessively dark tinting applied to the windscreen, or to the glass in any front window to either side of the driver. Window tinting applied during manufacture complies with the Visual Light Transmittance (VLT) standards. There are no VLT limits for rear windscreens or rear passenger windows.

Laws RTA 1988 sect 42 & CUR reg 32

Tyres. Tyres MUST be correctly inflated to the vehicle manufacturer’s specification for the load being carried. Always refer to the vehicle’s handbook or data. Tyres should also be free from certain cuts and other defects.

Cars, light vans and light trailers MUST have a tread depth of at least 1.6 mm across the central three-quarters of the breadth of the tread and around the entire circumference.

Motorcycles, large vehicles and passenger-carrying vehicles MUST have a tread depth of at least 1 mm across three-quarters of the breadth of the tread and in a continuous band around the entire circumference.

Mopeds should have visible tread.

Be aware that some vehicle defects can attract penalty points.

Tyre age. Tyres over 10 years old MUST NOT be used on the front axles of:

  • goods vehicles with a maximum gross weight of more than 3.5 tonnes
  • passenger vehicles with more than 8 passenger seats

Additionally, they MUST NOT be used on the rear axles of passenger vehicles with 9 to 16 passenger seats, unless equipped with twin wheels.

To prove the age of a tyre, it is further required that the date of tyre manufacture marking MUST always be legible.

Vehicles currently excluded from tyre roadworthiness regulations and vehicles of historical interest which are not used for commercial purpose are exempt from these requirements.

Law CUR reg 27

If a tyre bursts while you are driving, try to keep control of your vehicle. Grip the steering wheel firmly and allow the vehicle to roll to a stop at the side of the road.

If you have a flat tyre, stop as soon as it is safe to do so. Only change the tyre if you can do so without putting yourself or others at risk - otherwise call a breakdown service.

Tyre pressures. Check weekly. Do this before your journey, when tyres are cold. Warm or hot tyres may give a misleading reading.

Your brakes and steering will be adversely affected by under-inflated or over-inflated tyres. Excessive or uneven tyre wear may be caused by faults in the braking or suspension systems, or wheels which are out of alignment. Have these faults corrected as soon as possible.

Fluid levels. Check the fluid levels in your vehicle at least weekly. Low brake fluid may result in brake failure and a crash. Make sure you recognise the low fluid warning lights if your vehicle has them fitted.

Before winter. Ensure that the battery is well maintained and that there are appropriate anti-freeze agents in your radiator and windscreen bottle.

Other problems. If your vehicle

  • pulls to one side when braking, it is most likely to be a brake fault or incorrectly inflated tyres. Consult a garage or mechanic immediately
  • continues to bounce after pushing down on the front or rear, its shock absorbers are worn. Worn shock absorbers can seriously affect the operation of a vehicle and should be replaced
  • smells of anything unusual such as burning rubber, petrol or an electrical fault; investigate immediately. Do not risk a fire.

Overheated engines or fire. Most engines are water-cooled. If your engine overheats, you should wait until it has cooled naturally. Only then remove the coolant filler cap and add water or other coolant.

If your vehicle catches fire, get the occupants out of the vehicle quickly and to a safe place. Do not attempt to extinguish a fire in the engine compartment, as opening the bonnet will make the fire flare. Call the fire brigade.

Petrol stations/fuel tank/fuel leaks. Ensure that, when filling up your vehicle’s tank or any fuel cans you are carrying, you do not spill fuel on the forecourt. Any spilled fuel should be immediately reported to the petrol station attendant. Diesel spillage is dangerous to other road users, particularly motorcyclists, as it will significantly reduce the level of grip between the tyres and road surface. Double-check for fuel leaks and make sure that

  • you do not overfill your fuel tank
  • the fuel cap is fastened securely
  • the seal in the cap is not torn, perished or missing
  • there is no visual damage to the cap or the fuel tank.

Emergency fuel caps, if fitted, should form a good seal.

Never smoke, or use a mobile phone, on the forecourt of petrol stations as these are major fire risks and could cause an explosion.

Undertake all aspects of the daily walkaround checks for commercial vehicles, as recommended by DVSA (www.gov.uk/dvsa/commercial-vehicle-safety) and the Fleet Operator Recognition Scheme (www.fors-online.org.uk).

Vehicle security

When you leave your vehicle you should

  • remove the ignition key and engage the steering lock
  • lock the car, even if you only leave it for a few minutes
  • close the windows completely
  • never leave children or pets in an unventilated car
  • take all contents with you, or lock them in the boot. Remember, for all a thief knows a carrier bag may contain valuables
  • never leave vehicle documents in the car.

For extra security fit an anti-theft device such as an alarm or immobiliser. If you are buying a new car it is a good idea to check the level of built-in security features. Consider having your registration number etched on all your car windows. This is a cheap and effective deterrent to professional thieves.

Want to pass your theory test first time?
Download the Driving Theory Test Assistant app for FREE

Industry leading reviews from 629 verified buyers...

Keep up to date with us on social media...
What are we tweeting?

What is a contraflow system? πŸ€·β€β™‚οΈ Our useful article will help you understand everything you need to know πŸ‘‡ https://t.co/SgC8LD44Ds https://t.co/quDzc2TT9m
1 day ago
What is a contraflow system? πŸ€·β€β™‚οΈ Our useful article will help you understand everything you need to know πŸ‘‡ https://t.co/SgC8LD44Ds https://t.co/AHNO1aDIdh
1 day ago
Do you have a theory test date booked with the DVSA that you want to change? πŸš—πŸ“… Changing or cancelling a DVSA theory test date is a straightforward process. This article gives you the steps to reschedule your theory test booking πŸ‘‡ https://t.co/hsWfeUOYIZ #changetheorytest https://t.co/7HeguBAMDP
1 day ago
Looking for a quick and easy way to practice for your DVSA car theory test and PASS first time? ⚑ Get instant online access to the latest DVSA revision questions and CGI hazard perception clips, exclusive tutorial videos, plus much more πŸ‘‡ https://t.co/Y2wHD201uP #theorytest https://t.co/RU3nz1AUmI
5 days ago
What is a puffin crossing? πŸš¦πŸš— A puffin crossing is a pedestrian crossing that prioritises the safety of pedestrians. Find out everything you need to know here πŸ‘‡ https://t.co/HSqCXTe8TJ #puffincrossing #pedestriancrossing #theorytest #roadsafety #highwaycode https://t.co/d6RyKazQ2K
6 days ago
Does the car theory test expire? πŸš— Your car theory test certificate is valid for two years. You'll need to resit your theory test if you don't pass your practical test within this period 😱 Get help to PASS your car theory test now πŸ‘‡ https://t.co/Zt9psGFO3Q #theorytest https://t.co/QI59HUW9OK
1 week ago
🌟 HIGHWAY CODE RULE 101 🌟 You MUST NOT fit a rear-facing baby seat to a seat with a frontal airbag because it can cause serious injury or even death if you're involved in an incident ⚠️ Prepare for your theory test today πŸ‘‡ https://t.co/y6qD5vicht #theorytest #cartheorytest https://t.co/I6XQn3oknB
1 week ago
What should you do if your ABS light stays on? This is a question you will need to be able to answer for your UK driving theory test. Read our handy article to find out more https://t.co/rxH1U4ZrX6 https://t.co/4KT8nLsSXf
1 week ago
The only driving theory test video course you need to pass your DVSA theory test first time πŸ™Œ Get started for FREE now πŸ‘‡ https://t.co/ropdPlJMDI #theorytest #drivingtheorytest #theorytestvideocourse https://t.co/dRBLgkizw5
1 week ago
Revise for your DVSA theory test faster and smarter with our AI-powered theory test app ✨ Find out everything you need to pass your theory test first time πŸ‘‡ https://t.co/emXAKxOHAH #theorytest #theorytestapp #drivingtheorytest https://t.co/qVRKDnM0uE
1 week ago
πŸš— Worried about your theory test? πŸš— Here's how to pass your theory test first time WITHOUT reading a single book πŸ‘‡ https://t.co/O0nYHgRNdO #theorytest #theorytestpractice #theorytestrevision #booktheorytest https://t.co/6JQ04zFc4L
1 week ago
Looking to pass your LGV theory test? πŸ‘ We have all the resources you need to learn, practise, pass your theory test, and get on the road as quickly as possible! Find out more about our LGV training program now πŸ‘‡ https://t.co/5IazZrUTDh https://t.co/FkBSkWaO9T
2 weeks ago
TWO SECOND RULE ⚠️ In good dry weather, you need to position your vehicle at least two seconds behind the vehicle in front πŸš— In bad weather conditions, this safety gap should be doubled or more β›ˆοΈ Get ready for your car theory test πŸ‘‡ https://t.co/jlI1c9IM4i #theorytest https://t.co/WllLfOjTmX
2 weeks ago
What should you do if your ABS light stays on? This is a question you will need to be able to answer for your UK driving theory test. Read our handy article to find out more https://t.co/rxH1U4ZrX6 https://t.co/zglhpHkF8s
2 weeks ago
Try a FREE trial of our brand-new driving theory test video course πŸ‘‡ https://t.co/MB2eRSjs4c
2 weeks ago
What is the difference between a dual carriageway and a motorway? As a learner driver in the UK preparing for your DVSA theory test, it's essential to understand the differences between various types of roads. Here's everything you need to know πŸ‘‡ https://t.co/7JvfSU0Vvq https://t.co/vJBUJ8Z8u6
2 weeks ago
PASS your DVSA theory test first time in 2025 with our all-new AI-powered theory test app βœ¨πŸ“± Find out more now πŸ‘‡ https://t.co/emXAKxOHAH #theorytest #theorytestapp #aitheorytestapp #drivingtheorytest #booktheorytest https://t.co/27tDN7VEo6
2 weeks ago
How long is a theory test valid? πŸ—“οΈπŸš— The theory test certificate is valid for two years from the date you pass. Here's everything you need to know πŸ‘‡ https://t.co/A9ix1I8SNf #theorytest #drivingtheorytest #booktheorytest #dvsatheorytest https://t.co/F243L59SIe
2 weeks ago
How do I cancel a theory test booking? πŸ“… Many learner drivers will need to cancel their theory test booking. ✍ Check out this step-by-step guide on how to cancel your DVSA theory test appointment πŸ‘‡ https://t.co/is6ijW452F #canceltheorytest #theorytest #drivingtheorytest https://t.co/Rjqg4hmJvw
3 weeks ago
Want to PASS your DVSA car theory test first time? πŸš—πŸ“Ή Introducing our all-new car driving theory test video course! Try our video course for FREE now πŸ‘‡ https://t.co/iCG40UFfak #theorytest #theorytestvideocourse #booktheorytest https://t.co/QG77UYqpls
3 weeks ago