Why Pre-Journey Checks Matter

At Keston Car Care, we see it every year, drivers returning from a long trip with preventable damage, or worse, calling us from the hard shoulder of the M25. Checking your vehicle before a long journey to Cornwall, the Lake District, or even a European adventure isn’t just sensible, it’s essential for safety, reliability and avoiding costly breakdowns.

With busy bank holiday weekends and summer 2026 getaways approaching, stop-start traffic and high speeds will stress your car more than usual. Common causes of breakdowns we see in our Bromley workshop include flat batteries, low engine oil, under-inflated tyres, degraded coolant and low screen wash, all issues that a quick check can spot in advance. This article walks you step-by-step through what to check on your car before a long journey and when to let a professional garage handle it.

1. Tyres: Grip, Pressure and Legal Tread

Your tyres are your only contact with the road, making them critical for safe driving at motorway speeds and in wet UK weather. A few minutes inspecting them could prevent a dangerous condition developing mid-journey.

What to check:

• Use the 20p test or a tread gauge to check tyre tread depth, the legal minimum tread depth for tyres in the UK is 1.6 mm across the central three-quarters of the tyre’s circumference
• Look for cracks, cuts, bulges and sidewall damage on the outer edge, tyres should be checked for visible signs of damage, which can indicate wear and may lead to tyre failure if not addressed
• It is important to check the tyre pressure before a long journey, as underinflated tyres can lead to blowouts and affect vehicle handling and fuel efficiency
• Check pressures cold (morning is ideal) using figures from the fuel flap or vehicle’s handbook, adjusting for a fully loaded car
• Don’t forget the spare wheel, ensure it’s inflated to the correct pressure

Visit us at Keston Car Care if you spot anything suspicious or need advice on suitable options.

2. Engine Oil: Checking and Topping Up the Oil Level

Correct engine oil levels are vital on any long trip to lubricate, cool and protect your engine. Checking your oil level is crucial before a long journey, as one in three vehicles are found to have dangerously low oil levels, which can lead to engine damage if not addressed.

How to check:

• Park on level ground with the engine cold
• Remove the dipstick, wipe clean, reinsert fully, then check the oil level sits between MIN and MAX marks
• Different engines need different oil types (5W-30, 0W-20)consult your owner’s handbook or ask us to confirm the correct spec

If the oil looks very dark, smells burnt, or it’s been close to 12 months since your last car service, book an oil and filter change. Modern cars may display warning lights, but don’t rely solely on dashboard alerts before a long journey.

3. Coolant Levels and Engine Temperature Control

Engine coolant, or antifreeze, is essential for protecting your engine from extreme temperatures and preventing overheating, particularly important during summer heat or extremely cold temperatures in winter.

Checking safely:

• Locate the translucent expansion tank under the bonnet
• Coolant should be checked when the engine is cold, wait several hours or check first thing in the morning to avoid scalding steam
• The fluid level should sit between MIN and MAX marks
• Only top up with the correct type of coolant mix recommended by the manufacturer

If the level keeps dropping or you spot visible leaks, book into our garage. A full coolant change is usually due every few years and is best handled as part of scheduled car maintenance.

4. Brake Fluid, Brakes and Stopping Power

Being able to stop safely is more important than going faster, especially when carrying family and luggage. Before a long journey, it is essential to test your brakes by pressing down on the brake pedal before starting the engine; it should feel firm and not spongy.

Essential checks:

• Check the brake fluid reservoir under the bonnet, the fluid level should sit between MIN and MAX, appearing pale in colour
• When testing brakes while driving, apply them firmly in a safe place; the vehicle should stop promptly without pulling to one side
• Grinding noises or a soft pedal mean you should visit a garage immediately
• Brake fluid should be checked regularly and changed every two years, as it absorbs moisture over time

Never attempt complex brake repairs at home. Book a pre-journey brake check with Keston Car Care for peace of mind.

5. Screen Wash, Wipers and Visibility

Clear vision is essential on UK roads, where spray, bugs, salt and grime quickly coat your windscreen. Screen wash levels should be checked before a long journey, as low levels can impair visibility and lead to dangerous driving conditions.

Visibility checklist:

• Top up windscreen washer fluid with proper screen wash (not just water) for cleaning power and frost protection
• Checking the condition of your windscreen wipers is crucial, worn wiper blades can impair visibility during adverse weather
• Test washer jets and windscreen wipers before leaving, ensuring they clear the screen without streaking
• Regularly cleaning your windscreen and windows is crucial for maintaining visibility cleaning mirrors and the windscreen maximises visibility for safe long-distance driving
• Check for chips or cracks, a chip or crack 10 mm or larger in the driver’s field of vision can cause a car to fail its MOT test

We can quickly supply and fit new wiper blades or diagnose washer system faults at our Bromley workshop.

6. Lights, Electrics and Dashboard Warning Symbols

Fully functioning lights aren’t just legal requirements, they’re vital for safe driving at night, in rain or fog lights conditions on any long journey. Before setting off on any journey, it is essential to check that all vehicle lights are functioning properly, including headlights, brake lights, indicators, and fog lights.

What to inspect:

• Walk around the car with ignition on and check all lights, to ensure all lights are working, you can ask someone to help you check or use a reflective surface
• If any lights are not functioning, they should be replaced before starting your journey
• The battery should be checked for corrosion, and terminals should be secure; if the battery is older than 3-4 years, a load test is advisable
• Signs like slow cranking or dim interior lights suggest battery issues

Persistent warning lights (ABS, engine, tyre pressure, battery, coolant) should never be ignored. Have the car diagnosed by a professional before heading off, we can run a quick check at Keston Car Care.

7. Under-Bonnet Fluids and Filters

Several other fluids help your vehicle run smoothly. A visual inspection can highlight developing potential issues before a road trip.

Additional checks:

• Power steering fluid level (if not electric steering), top up only with specified fluid
• Clutch fluid level in cars with hydraulic clutch
• Review service history for engine air filter, fuel filter and cabin filter changes—clogged filters hurt fuel efficiency and comfort

If you’re not confident working under the bonnet, book a pre-journey car service with us so a mechanic can inspect all fluids and filters properly.

8. Interior Comfort, Loading and Emergency Kit

Long journeys are easier and safer when the cabin is tidy and the car sensibly loaded. A clean interior not only provides a pleasant environment for passengers but also reduces the risk of injury and driver distraction from loose items moving around the cabin.

Preparation tips:

• Remove loose items from dashboard and footwells, these can roll under pedals or become projectiles
• Keeping the outside of your car clean is essential, as a dirty vehicle can obstruct visibility and lead to fines for having an unreadable number plate
• Test air conditioning or heating so drivers stay alert
• An emergency kit should include items like a warning triangle, high-visibility vest, first aid kit, torch, and jumper cables
• Also carry a spare wheel (or tyre repair kit), jump leads and basic tools
• Place heavy luggage low and forward in the boot

9. Documents, Insurance and Planning Your Long Trip

Preparation isn’t just mechanical. Vehicle documentation, including driving licence, insurance, and breakdown cover, should be confirmed to be up to date before travel.

Before departure:

• Verify MOT validity, road tax and insurance cover your journey dates (including European travel if applicable)
• Keep Keston Car Care’s contact details accessible alongside breakdown cover information
• Plan your route, set navigation before driving, and identify fuel stops every two hours
• Be well-rested, avoid alcohol the night before, and build in extra time for traffic

10. When to Ask a Garage for a Pre-Journey Car Service

While many checks are simple, some issues are best left to professionals, especially if your car is older or hasn’t been serviced recently.

Signs you should book with us:

• Recent warning lights or unusual noises
• Vibration through steering or pulling under braking
• Overdue annual service
• Very long journeys (South London to Scotland, European road trips)
• Travelling with children and a full load

A typical pre-journey service at Keston Car Care includes engine oil and filter change, brake inspection, fluid checks, tyre check, lights and battery test. Contact us to book a comprehensive check a week or two before your planned departure.

Long Car Journey FAQs

How long before a long journey should I check my car?

Complete most checks 2–3 days before departure to allow time for repairs. Do a quick check on the morning of departure to recheck tyres, lights and dashboard warnings. Workshop appointments at Keston Car Care are easier to arrange if you book at least a week before busy periods.

Do I need a full service before every long trip?

A full car service follows time or mileage intervals (typically every 12 months or 10,000–12,000 miles), not every trip. If your service is due soon or you’ve noticed changes in how the car drives, have it done beforehand. If recently serviced and running well, DIY checks plus a quick garage visit for anything uncertain is often sufficient.

Is it safe to drive if a warning light appears right before my trip?

It depends on the type, any red warning symbol (brake, oil pressure, engine temperature) usually means stop as soon as it’s safe. Postpone your journey and contact a garage. Amber lights still need prompt attention; have us read the fault codes before a long journey.

What should I keep in the car for emergencies on a long journey?

An aid kit should include a fully inflated spare wheel or repair kit, jack, locking wheel nut key, reflective triangle, high-visibility vest and first aid kit. Also carry a torch, phone charger, jumper cables, screen wash, engine oil, gloves and water. We can advise on and supply many of these items at our local dealer workshop.