Vehicle safety checks are the foundation of safe driving — and one of the first things assessed on the RSA driving test. The examiner will ask you to demonstrate technical checks before you even leave the car park. Beyond the test, knowing how to check your vehicle properly protects you, your passengers, and every other road user you share the road with.

Source & Credit: Based on RSA Rules of the Road (Section 4: Vehicle Safety), RSA EDT Programme (Session 1: Car Controls & Safety Checks), and RSA driving test requirements. All standards verified against RSA guidance at rsa.ie. BP Driving School is an RSA-approved ADI in Swords, North Dublin.
Vehicle Safety & Pre-Drive Checks — Article Series
In This Guide
  1. Why Vehicle Safety Checks Matter
  2. What the RSA Examiner Checks on Test Day
  3. All Checks at a Glance
  4. Tyres — Tread, Pressure and Damage
  5. Engine Fluids — Oil, Coolant, Washer Fluid
  6. Lights and Reflectors
  7. Windscreen Wipers and Washers
  8. Brakes and Steering
  9. Mirrors
  10. The Cockpit Drill — Pre-Drive Routine
  11. Secondary Controls
  12. Legal Requirements — NCT, Insurance, Tax
  13. Emergency Items to Keep in Your Car
  14. Frequently Asked Questions

Why Vehicle Safety Checks Matter

The RSA is unequivocal: it is an offence to drive an unsafe vehicle on a public road. Vehicle owners are legally responsible for ensuring their car is roadworthy every time they drive it. This is not just about passing the NCT once every couple of years — it is an ongoing responsibility.

Tyre blowouts, brake failures, obscured windscreens and non-functioning lights are all preventable. Regular checks take five minutes before a journey and can prevent collisions, breakdowns and criminal liability.

For learner drivers specifically, vehicle safety checks are introduced in EDT Session 1 — Car Controls and Safety Checks. The RSA requires your ADI to confirm you can carry out appropriate pre-start vehicle checks before your first session of on-road driving even begins.

RSA Rules of the Road (Section 4): "As a driver, you must make sure that your vehicle is in good working order. You must ensure that the steering, brakes, front and rear lamps, indicators, reflectors, rear view mirrors, safety belts, speedometer, tyres, windscreen wipers, horn and silencer are checked regularly."

What the RSA Examiner Checks on Test Day

At the start of your RSA driving test, before you move the car, the examiner will ask you to demonstrate technical checks and work the secondary controls. These are part of the formal assessment and are marked on the Driving Test Report Form.

The RSA states the examiner will require you to demonstrate technical checks for:

  • Air pressure and the condition of tyres
  • Engine oil level
  • Fuel level
  • Windscreen washer fluid level
  • Coolant level
  • Brakes (including the handbrake)
  • Steering
  • Lights, indicators, reflectors
  • Horn

And the secondary controls you must operate correctly:

  • Windscreen wipers and washers
  • De-misters (front and rear)
  • Rear window heater
  • Lights (including fog lights)
  • Air conditioning, fans, air vents
  • Temperature control
On test day: you do not need to physically open the bonnet and point to every dipstick — the examiner asks you to explain and demonstrate where possible. You must know where everything is located in your specific test car. Practice these with your ADI in the car you will be tested in.

All Checks at a Glance

Vehicle Safety Check Zones — Complete Overview
Vehicle safety check zones overview — all checks annotated on car diagram 🔵 Tyres Tread, pressure, damage 🟡 Engine fluids Oil, coolant, washer fluid 🟣 Lights Front, rear, indicators 🟢 Wipers Blades, washers, fluid 🔴 Brakes Foot + handbrake 🔷 Mirrors Rear-view + door mirrors
Six check zones on every vehicle: tyres, engine fluids, lights, wipers, brakes and mirrors. All six are assessed during EDT Session 1 and tested on the RSA driving test.

Tyres — Tread, Pressure and Damage

Tyres are the only part of the car in contact with the road. Worn, under-inflated or damaged tyres significantly increase stopping distances and the risk of a blowout.

Tread Depth
  • Legal minimum: 1.6mm across the main tread
  • RSA recommends changing at 3mm — grip drops significantly below this
  • Use the 20c coin test — if the gold rim is visible when inserted into the tread groove, replace the tyre
  • Check all four tyres — and the spare
Tyre Pressure
  • Check with a pressure gauge when tyres are cold
  • Correct pressure is in the manufacturer's handbook or on a sticker inside the driver's door frame
  • Under-inflation increases fuel consumption and wear; over-inflation reduces grip
  • Check including the spare tyre
Tyre Damage
  • Inspect for cuts, cracks, bulges and embedded objects
  • Bulges indicate internal damage — replace immediately
  • Do not mix radial and cross-ply tyres on any axle
  • Secondhand tyres should be avoided — no history of use or abuse
Tyre Tread Depth — Legal Minimum vs Recommended Change Point
Tyre tread depth comparison — new tyre 8mm, change recommended at 3mm, legal limit 1.6mm New Tyre ~8mm ✓ Excellent Full grip Change Recommended 3mm ⚠ Change now RSA recommends replacing Legal Minimum 1.6mm ❌ Replace immediately Legal minimum — dangerous in wet
New tyres start at around 8mm. The RSA recommends replacing at 3mm (reduced grip, especially in wet). 1.6mm is the legal absolute minimum — at this depth, wet-weather stopping distances increase significantly.
Deeper dive: How to Check Your Tyre Pressure and Tread Depth — a full step-by-step guide with the coin test, pressure gauge method, and how to read the tyre sidewall.

Engine Fluids — Oil, Coolant, Washer Fluid

Three fluid levels must be checked regularly and are specifically asked about on the RSA driving test. All are checked with the engine cold and the car parked on level ground.

Under the Bonnet — Key Fluid Check Locations
Under bonnet fluid check locations — oil dipstick, coolant reservoir, washer fluid reservoir Engine Block Battery OIL Engine Oil Dipstick + filler cap COOL- ANT Coolant Between MIN–MAX marks WASH FLUID Washer Fluid Top up with screen wash MAX MIN Dipstick
Three key under-bonnet checks: engine oil (dipstick + filler cap), coolant reservoir (level between MIN and MAX), and windscreen washer fluid. All must be on your pre-drive checklist and are asked about on the RSA driving test.
🛢️ Engine Oil
  • Check with engine cold, car level
  • Pull the dipstick, wipe clean, reinsert fully, pull again
  • Oil level should sit between MIN and MAX marks
  • Check every two weeks and before long journeys
  • Low oil = engine damage; too much = just as harmful
🌡️ Coolant
  • Check the translucent coolant reservoir (not the radiator cap)
  • Level should sit between MIN and MAX markings on the side
  • Never open the radiator cap when the engine is hot
  • Use the correct coolant/antifreeze mix for your car
  • Low coolant can cause engine overheating and serious damage
💧 Washer Fluid
  • Top up the windscreen washer reservoir regularly
  • Use screen wash concentrate — not plain water (freezes in winter)
  • Winter screen wash works below 0°C — essential on Irish roads
  • Running out during a journey can leave windscreen covered in road spray
Deeper dive: How to Check Your Engine Oil — Step by Step — full dipstick guide, what the oil colour tells you, and when to book a service.

Lights and Reflectors

The RSA Rules of the Road specifies the exact lights and reflectors every motor vehicle must have. A car with a non-working bulb is not roadworthy and the driver can be stopped and required to repair it.

Required Lights — Front
  • Two headlights (white or yellow)
  • Two white sidelights
  • Direction indicator lights (amber only)
Required Lights — Rear
  • Two red tail lights
  • Two red brake lights
  • Two red reflectors
  • Number plate lighting
  • Direction indicator lights (amber only)
Fog lights: you must only use fog lights in dense fog or falling snow. Leaving fog lights on in clear weather causes glare and can dazzle other drivers. This is a fault on the RSA driving test.

To check your own lights: park facing a wall or reflective surface, switch each light on in turn and observe the reflection. Ask a second person to stand behind the car and confirm brake lights and indicators work while you operate them.

Deeper dive: How to Check Your Car Lights and Indicators — which lights are required by law, how to check alone, and what to do if a bulb fails.

Windscreen Wipers and Washers

The RSA specifically requires: "Keep your windscreen wipers and wiper blades in good working condition and keep your windscreen washer liquid topped up." and "Keep your windscreen and windows clean and free of clutter to make sure you can see the road and other road users clearly."

  • Inspect wiper blades for splits, hardening or streaking — replace every 12 months minimum
  • Test both front wipers and the rear wiper (if fitted) before driving in wet weather
  • Check the washer jet spray direction — jets should cover the windscreen evenly
  • Driving with a clogged or broken wiper on a wet day is a serious visibility hazard
  • An obstructed windscreen (stickers, dirt, condensation) is also an offence
Deeper dive: How to Check Your Windscreen Washer and Wipers — blade inspection, jet alignment and the legal requirement for clear vision.

Brakes and Steering

Both brakes and steering are fundamental to controlling the vehicle safely. The RSA requires these to be checked regularly. On the driving test, the examiner asks you to explain how you would check brakes and how to identify if steering is not responding correctly.

  • Footbrake: should feel firm when pressed — a spongy or low pedal suggests air in the brake fluid or a fluid leak. Brake fluid should be checked monthly
  • Handbrake: should hold the car stationary on a slope; if it travels too far before holding, adjustment is needed
  • Steering: the wheel should turn smoothly with no resistance, grinding or vibration. Any looseness or pulling to one side needs immediate professional attention
  • Warning lights: brake and ABS warning lights on your dashboard indicate a fault — do not drive until investigated

Mirrors

The RSA requires your vehicle to have mirrors so that you always know what is behind and to each side. Before every journey, check that all mirrors are clean, intact and correctly adjusted.

  • Rear-view (interior) mirror: centred on the rear window, not tilted — you should see the full rear window with minimal head movement
  • Left door mirror: angled to show the lane beside and slightly behind you, with a sliver of your car visible on the right edge of the mirror
  • Right door mirror: same principle — lane beside and behind, sliver of your car on left edge
  • Cracked or missing mirrors make the vehicle unroadworthy
  • Adjust mirrors before every drive — the previous driver may have moved the seat and mirrors
Learning to drive in Swords or North Dublin?

Vehicle safety checks are covered in your first EDT session with BP Driving School. RSA-approved, 7 days a week.

The Cockpit Drill — Pre-Drive Routine

The cockpit drill is the five-step pre-drive routine every driver must complete before moving off. It is assessed at the start of the RSA driving test. The RSA requires the examiner to check that you adjust the seat, seat-belt and head restraint, and that mirrors are correctly positioned and doors are closed before driving.

A common memory aid for the cockpit drill is D-S-S-S-B:

D
Doors

Check all doors are fully closed and secured before starting the engine. A door ajar warning light (if fitted) should not be showing.

S
Seat

Adjust the seat so you can reach both pedals fully with a slight bend at the knee, and the steering wheel with arms slightly bent. You should not be reaching or cramped.

S
Steering / Head Restraint

Adjust the head restraint so the centre of the restraint is level with your eyes or the top of your ears. This protects against whiplash in a rear collision.

S
Seatbelt

Fasten your seatbelt. Check that any passengers are also belted. The driver is responsible for ensuring passengers under 17 years old are correctly restrained.

B
Blinkers (Mirrors)

Adjust the rear-view mirror and both door mirrors. Each should give you clear visibility behind and to the side with minimal head movement. Do not drive until all three are correctly set.

The Cockpit Drill — D·S·S·S·B Sequence
Cockpit drill sequence DSSSB — Doors, Seat, Steering/Head Restraint, Seatbelt, Blinkers/Mirrors D Doors Closed & secure S Seat Pedals & wheel S Steering Head restraint S Seatbelt Self & passengers B Blinkers Adjust all mirrors
D·S·S·S·B — Doors, Seat, Steering/Head Restraint, Seatbelt, Blinkers (Mirrors). Complete this sequence every time before moving off. The RSA examiner checks this at the start of the driving test.
Deeper dive: What Is the Cockpit Drill? — RSA Pre-Drive Routine — full cockpit drill guide with correct mirror angles, head restraint positioning and what the examiner looks for.

Secondary Controls

Secondary controls are the devices that do not directly move the car but control what you can see and how you are seen. The RSA examiner will ask you to operate several of these at the start of your driving test. You must know where all of them are in your specific test car without hesitation.

  • Windscreen wipers and washers — speed settings, jet direction
  • Front demister — heated windscreen or fan/heat to clear condensation
  • Rear window heater — the heated element in the rear glass
  • Rear wiper (if fitted) — important in poor visibility
  • Fog lights — front and rear (separate switches on many cars)
  • Hazard warning lights — the red triangle button
  • Air conditioning / fans / vents — temperature and direction
  • Horn — location and operation
Test day tip: if you are using the school or an instructor's car for your test, spend 5–10 minutes in the car park before the test starts familiarising yourself with every secondary control. Hesitating when the examiner asks "can you show me the rear fog light switch?" is an unnecessary fault when the switch is right in front of you.

Beyond the mechanical checks, driving a car on Irish roads requires three legal documents to be in order at all times. Your ADI will verify these on your first EDT lesson.

RequirementWhat It CoversKey Deadlines
NCT (National Car Test) Roadworthiness of the vehicle — tyres, brakes, lights, emissions, structure Cars 4–10 years old: every 2 years. Over 10 years: every year. Display NCT disc on windscreen.
Motor Tax Annual tax on vehicles used on public roads Must be renewed before current disc expires. Display tax disc on windscreen.
Motor Insurance At minimum: third party cover. Display insurance disc on windscreen. Must be valid at all times. Driving uninsured: mandatory court appearance.
Driving without a valid NCT, tax or insurance are all serious offences in Ireland. An uninsured driver faces a mandatory court appearance, and a Garda can seize an uninsured vehicle at the roadside. Check all three are current before every journey, and especially before your driving test.

Emergency Items to Keep in Your Car

The RSA recommends keeping the following items in your vehicle at all times. A red warning triangle is legally required for HGVs — and strongly recommended for all car drivers.

🩹

First Aid Kit

🦺

High-Viz Vest (min. 1)

⚠️

Red Warning Triangle

🔦

Torch

🧯

Small Fire Extinguisher

In a breakdown or collision: the high-viz vest should be put on before leaving the car. The warning triangle should be placed at least 50 metres behind the vehicle to warn approaching drivers. Never stand on the road side of a stationary vehicle on a motorway or dual carriageway.

Frequently Asked Questions

The RSA examiner asks you to demonstrate technical checks for: air pressure and condition of tyres, engine oil, fuel, windscreen washer fluid, coolant, brakes (including handbrake), steering, lights, indicators, reflectors and horn. You must also operate the secondary controls: wipers, demisters, rear window heater, fog lights, air conditioning and fans.

The legal minimum is 1.6mm across the main tread area. The RSA strongly recommends changing tyres when they reach 3mm, as grip — especially in wet conditions — degrades significantly below this level. Check all four tyres and the spare regularly.

The RSA recommends checking engine oil at minimum every two weeks and before long journeys. Check with the engine cold and the car parked on level ground. The oil level on the dipstick should sit between the MIN and MAX marks.

The cockpit drill (D·S·S·S·B) is the pre-drive routine every driver must complete before moving off: Doors closed, Seat adjusted, Steering/Head Restraint set, Seatbelt fastened, Blinkers/Mirrors adjusted. The RSA assesses this at the start of the driving test.

Yes. The RSA Rules of the Road states it is an offence to drive an unsafe vehicle on a public road. A Garda can stop and inspect your vehicle. Driving a dangerously defective vehicle is a mandatory court appearance offence. Vehicle owners are responsible for keeping their car roadworthy at all times.

The NCT (National Car Test) is the mandatory roadworthiness test for passenger cars in Ireland. Cars over 4 years old must be tested — every 2 years for cars between 4 and 10 years, and every year for cars over 10 years. The NCT disc must be displayed on the windscreen. Driving without a valid NCT is an offence.

The RSA recommends: a first aid kit, at least one high-visibility vest or jacket, at least one red warning triangle (required for HGVs), a torch, and a small fire extinguisher. These are recommended for all drivers — not just commercial vehicles.
Continue in the Vehicle Safety & Pre-Drive Checks series
Vehicle safety checks start in EDT Session 1.
Your first lesson with BP Driving School covers pre-start checks, primary and secondary controls and vehicle roadworthiness — exactly as the RSA requires. Book your EDT course — RSA-approved, Swords, door-to-door pickup across North Dublin.

Already done EDT? Book a mock test to practise the technical check questions the examiner will ask on test day.