Road Trip Car Checklist: What to Inspect Before You Leave

Breakdowns don't happen at convenient times. They happen on a highway in 95-degree heat, 40 miles from the nearest exit, with everyone in the car asking how much longer it's going to be. A one-hour inspection the day before your trip eliminates most of the scenarios that cause this.

Here's a complete road trip inspection checklist you can work through in your driveway.

---

The Night Before: Visual Checks (15 Minutes)

Tires

• Pressure: Check all four tires plus the spare. Inflate to the spec on the driver's door jamb sticker. Pressure should be checked cold, before driving.
• Tread depth: Do the quarter test — insert a quarter into a groove. If you see the top of Washington's head, tread depth is below 4/32" and the tire should be replaced.
• Sidewall condition: Look for cracking, bulges, or bubbles in the sidewall. A bulge indicates internal damage — replace immediately.

Lights

Walk around the car and confirm:

• Headlights (both low and high beam)
• Tail lights
• Brake lights (have someone watch while you press the pedal)
• Turn signals (all four corners)
• Reverse lights
• Hazard lights

Visible Leaks

Park on a clean surface and check for any fluids dripping or pooled under the car. Clear water from the AC drain is normal. Oil, coolant, or brake fluid is not.

---

Under the Hood (20 Minutes)

Engine Oil

Pull the dipstick, wipe, re-insert, pull again. Level should be between MIN and MAX. If you're within 500 miles of an oil change interval, do it before the trip.

Coolant

With the engine cold, check the overflow reservoir level. The coolant should be bright-colored (green, orange, pink, or blue) — not brown or rusty.

Brake Fluid

The brake fluid reservoir is typically a translucent plastic container near the firewall on the driver's side. The level should be between MIN and MAX. If it's dark brown instead of clear or pale yellow, it's overdue for replacement.

Power Steering Fluid

Check the reservoir (if your vehicle has hydraulic steering). Level should be at or near MAX when cold.

Windshield Washer Fluid

Fill it completely. You'll go through more than you expect on a highway trip.

Belts

Inspect the serpentine belt for cracks, fraying, or glazing. A broken serpentine belt kills power steering, the alternator, and the water pump all at once.

Hoses

Squeeze the main coolant hoses. They should feel firm and resilient — not soft, swollen, or crumbly.

---

Brakes (5 Minutes of Driving)

Find an empty parking lot and do a series of medium-to-firm brake applications. Listen and feel for:

• Squealing: Wear indicator — pads are near end of life
• Grinding: Metal-on-metal — immediate attention needed
• Pulling left or right: Uneven brake wear or stuck caliper
• Spongy pedal: Air in brake lines — do not take on a highway trip

Related: How to Bleed Brakes by Yourself

---

Battery (2 Minutes)

If the battery is over 3 years old, get a free battery test at any auto parts store. A battery that starts fine on a mild morning may fail on a hot afternoon with the AC at full load.

---

Emergency Kit (Assemble the Day Before)

• Jumper cables or a portable jump starter pack
• Tire inflator/can of tire sealant
• Basic hand tools (flathead, Phillips, pliers, adjustable wrench)
• Flashlight with working batteries
• Phone charger (keep a spare in the car)
• Water (at least 1 liter per person)
• Physical map or offline map download

---

Get a Printable Version

The free Essential Car Maintenance Checklist at OwnerDrop includes a road trip inspection checklist you can print and use. The AI Garage Copilot at OwnerDrop walks you through any repair you find during your inspection. Plans start at $29.99/mo.