Cars & Driving

Your Car Before a Long Journey: What to Check and Why It Matters

Updated Mar 1, 2026 5 min read
Driver inspecting a car tyre in a parking lot before a long road trip

In This Article

Key Takeaways

  • Tyre pressure and tread depth are among the most critical checks before any long drive.
  • Fluid levels — oil, coolant, and brake fluid — should be verified at least a day before departure.
  • A dashboard warning light before a long trip should never be ignored or dismissed.
  • Carrying essential documents and emergency supplies can make a breakdown far less stressful.
  • Most pre-journey checks require no special tools and take under an hour to complete.
20–40 min

Summary

18 items · 20–40 minutes

Why Pre-Journey Checks Are Worth the Time

Most breakdowns on highways and interstates aren't random acts of mechanical bad luck — they're the result of conditions that were already developing before the driver left home. A worn tyre, low coolant, or a battery on its last legs doesn't announce itself dramatically. It waits until you're miles from the nearest exit.

Running through this checklist before a long drive gives you a realistic picture of your car's condition and a chance to address small issues before they become expensive, time-consuming, or dangerous ones. It also takes far less time than most drivers expect. See our pre-long drive checklist for everyday drivers for a complementary reference, and consult our routine maintenance milestones guide if you're unsure whether your car is current on scheduled service.

Tyres

Check tyre pressure on all four tyres and the spare using a gauge, and inflate to the manufacturer-recommended PSI found on the door jamb sticker. Must
Inspect tread depth visually or with a penny test — if Lincoln's head is fully visible when inserted into the tread groove, the tyre is legally and functionally worn. Must
Look over each tyre's sidewall for bulges, cuts, or embedded objects that could cause a blowout at highway speed. Must
Confirm the spare tyre is properly inflated and accessible, and that the jack and lug wrench are present in the vehicle. Should

Fluids

Check engine oil level using the dipstick with the engine cold; top up or schedule an oil change if the level is low or the oil appears very dark and gritty. Must
Inspect the coolant (antifreeze) reservoir level when the engine is completely cool — never open the radiator cap on a warm engine. Must
Verify brake fluid level in the transparent reservoir under the hood; a notably low level may indicate brake wear or a leak and warrants professional inspection. Must
Top up windshield washer fluid to ensure visibility during highway driving, especially in bug season or wet weather. Should
Check power steering fluid level if your vehicle has a hydraulic power steering system rather than an electric one. Nice to have

Lights and Visibility

Walk around the car with the headlights on to confirm all bulbs are functional, including low beams, high beams, and taillights. Must
Test brake lights by reversing toward a reflective surface or asking a second person to confirm they illuminate when you press the pedal. Must
Inspect wiper blades for streaking or skipping; replace them if they leave large unwiped arcs across the windshield. Should

Battery and Engine

Listen for any hesitation or sluggishness when starting the engine — slow cranking is one of the clearest signs that a battery is weakening. Must
Check battery terminals for white or bluish corrosion buildup, which can impair electrical connections and contribute to starting failures. Should
Scan the dashboard for any active warning lights and address them before departure; do not assume an illuminated light will resolve itself. Must

Documents and Emergency Supplies

Confirm your driver's license, vehicle registration, and current insurance card are in the car and accessible. Must
Verify that a basic emergency kit is in the trunk, including jumper cables or a jump starter, a flashlight, basic tools, and a first-aid kit. Should
Pack water and a phone charger as a minimum comfort and safety buffer, particularly for drives through remote or sparsely serviced areas. Nice to have

What to Bring and What to Verify

Mechanical readiness is only part of the equation. Before you pull out of the driveway, confirm you have the right documents on hand and that your car's emergency supplies are stocked. A vehicle that runs perfectly but lacks proof of insurance can still create a serious headache if you're stopped or involved in an incident.

Keep your vehicle documents organized and accessible — including your registration and insurance card — and check that your roadside emergency kit is complete before the trip, not after something goes wrong.

Low Brake Fluid Is Not a Minor Issue

Brake fluid level that is noticeably below the minimum line can signal worn brake pads or, more seriously, a leak in the braking system. Either condition can compromise stopping performance on a long drive. If the level is low and you're unsure why, have a qualified mechanic inspect the braking system before you travel.

If your dashboard lit up with any warning indicator during a recent drive, address it before departure. Our guide to what your car's warning lights are actually telling you explains which signals can wait and which require immediate attention. For a broader road trip planning perspective, see useful things to know before planning a road trip.

Required

Tyre pressure gauge

Used to accurately measure PSI in each tyre so you can inflate or deflate to the manufacturer's specification.

Required

Penny or tread depth gauge

Provides a quick, reliable check of remaining tyre tread depth before highway driving.

Optional

Flashlight or work light

Helps you inspect under-hood components and tyre sidewalls clearly, especially in low-light conditions.

Required

Jumper cables or portable jump starter

Essential emergency tool if your battery fails far from a service station.

Optional

Basic first-aid kit

Provides fundamental medical supplies in the event of a minor injury during the trip.

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