7 Things You should Check before Setting Off for 4th of July

The Fourth of July is one of the busiest travel periods of the year, with many Americans driving to see family, go camping, watch fireworks, or take a long weekend getaway. For 2026, AAA projects 72.2 million Americans will travel at least 50 miles from home during Independence Day week, including 61.4 million people traveling by car. AAA also reported more than 687,000 roadside assistance calls during last year’s Independence Day week, with battery issues and flat tires making up a major share of those calls.

A quick inspection before you leave can help you avoid getting stranded, delaying your trip, or creating a hazard on a crowded road. Here are seven things to check before your Fourth of July road trip.

What should I Check before a Road Trip?

1. Battery

Your battery should be one of the first things you check before a long drive, especially if it’s already three to five years old. Common bad battery symptoms include slow cranking, dim lights, clicking when you turn the key, or needing a jump-start. Also look for corrosion around the terminals and make sure the cables are secure. If your vehicle has been struggling to start, have the battery tested before your trip and replace weak batteries before they fail on the road. 

2. Lights

Fireworks, late dinners, and post-celebration traffic often mean driving at night. Check your headlights, tail lights, brake lights, turn signals, hazard lights, reverse lights, fog lights, and license plate lights. Replace burned-out bulbs before you leave, and clean cloudy headlight lenses if they’re reducing visibility. Working lights help you see the road and make sure other drivers can see you. 

3. Oil

Engine oil lubricates, cools, and protects critical engine components. Before a long drive, park on level ground, let the engine sit for a few minutes, and check the oil level with the dipstick. The oil should be within the safe range marked on the dipstick, not above the maximum line or below the minimum line. Dark oil is not always an emergency, but gritty oil, a burnt smell, or a milky appearance can signal a problem. If your oil change is due soon, it’s smarter to take care of it before the trip and replace the oil filter as needed. For DIY maintenance, review these oil change tips before getting started. 

4. Coolant

Don’t top off the radiator with plain water unless it’s an emergency. Your cooling system needs the correct coolant or coolant-water mixture recommended for your vehicle. Check the coolant level in the reservoir when the engine is cool, and never open a hot radiator cap because the system can be under pressure. Low coolant, visible leaks, sweet smells, steam, or rising temperature readings should be inspected before a road trip. If the coolant is old, contaminated, or overdue for service, schedule a flush rather than simply topping it up.

5. Brakes

Your brakes need to be ready for heavy traffic, sudden stops, and long highway drives. Listen for squeaking, scraping, or grinding noise, and pay attention to vibration, pulling, a soft brake pedal, or a brake warning light. Worn pads, damaged rotors, and low fluid can all reduce stopping power. Have your brake pads, rotors, and brake fluid checked before leaving, especially if your vehicle already feels different when braking. If replacement is needed, a brake disc and pad kit can help restore braking performance.

6. Tires

This section should be about tires, not just “air.” Check tire pressure when the tires are cold and use the pressure listed on the driver-side door placard or in your owner’s manual, not the maximum pressure printed on the tire sidewall. Don’t rely only on your tire pressure monitoring system, because some systems warn you only after the pressure is already significantly low. If your tire pressure monitoring system warning light is on, check the tires manually and diagnose the issue before leaving.

Also inspect tread depth, sidewall cracks, bulges, punctures, and uneven wear. The penny test can help in a pinch: insert a penny into the tread groove with Lincoln’s head upside down. If you can see the top of Lincoln’s head, the tire is at or below the minimum legal tread depth and should be replaced. A tread depth gauge is more accurate, and tires should often be replaced before they reach the absolute minimum. Review this guide to tire pressure and tread if you’re unsure how to check them properly. Don’t forget to inspect the spare tire, jack, and lug wrench too.

7. Fuel

Running out of gas is preventable, but it still happens. Fill up before leaving, especially if you’re driving through rural areas, unfamiliar routes, or places where stations may be crowded for the holiday. Plan fuel stops ahead of time, and avoid letting the tank get too low. A full tank also gives you more flexibility if you hit traffic, take a detour, or need to keep the air conditioning running while stopped.

Before leaving, pack an emergency kit with jumper cables, a flashlight, basic tools, gloves, a tire pressure gauge, warning triangles or road flares, water, phone chargers, and first-aid supplies. More importantly, check yourself. If you plan to drink, arrange a sober ride and do not drive. NHTSA warns that impaired-driving crashes increase around the Fourth of July and advises drivers to plan a sober ride before drinking.