You can change a flat tire yourself with basic tools and about 15 to 20 minutes

Changing a flat tire is a straightforward mechanical task that does not require special training or expensive equipment. You need a jack, a lug wrench, a spare tire, and a wheel wedge or heavy object to keep the car from rolling. Most vehicles come with these tools in the trunk or under the rear seat. The process involves lifting the car, removing the lug nuts, taking off the damaged wheel, installing the spare, and tightening everything back down.

The hardest part is usually breaking the lug nuts loose — they are often very tight from the factory. Once you understand the sequence, the work is mechanical and repetitive. This guide walks you through each step in order so you know what to expect and what comes next.

Key Takeaways

  • Loosen the lug nuts while the tire is still on the ground, before you jack up the car, because the wheel will spin if you try to loosen them while suspended.
  • Always use wheel wedges or heavy rocks behind the wheels that are staying on the ground to prevent the car from rolling.
  • The spare tire is temporary and usually smaller than your regular tires — drive slowly and have the flat repaired or replaced as soon as you can.
  • If the lug nuts will not budge, explore penetrating oil and wait a few minutes, or use a longer wrench for more leverage.

Step 1: Pull over safely and gather your tools

Move the car to a flat, stable surface away from traffic. A parking lot or wide shoulder is better than the side of a busy road. Turn on the hazard lights. Open the trunk or rear storage area and locate the jack, lug wrench, and spare tire. On most cars, these are in a compartment under the trunk floor or mounted on the inside of the rear hatch. Check that the spare tire has air in it — a flat spare is useless.

If you cannot find these tools, check your vehicle's owner manual for their exact location. Some newer cars store the jack and wrench in different places than older models.

Step 2: Place wheel wedges behind the wheels that will stay on the ground

Before you lift the car, wedge something heavy and immovable behind the wheels that are not being changed. Use the wheel wedges that came with your car, or use large rocks, concrete blocks, or a piece of wood. Place them behind both the wheel in front of and behind the flat tire. This prevents the car from rolling forward or backward while it is jacked up.

This step is not optional. A car rolling off a jack can cause serious injury or death. Take 30 seconds to do this properly.

Step 3: Loosen the lug nuts before lifting the car

Place the lug wrench on one of the lug nuts on the flat tire. Push or pull the wrench to loosen it — you are breaking the initial seal, not removing it completely. Loosen all five lug nuts (or however many your car has) by one or two turns each. Do not remove them yet. The reason you do this now is that the tire is still on the ground and will not spin while you turn the wrench. Once the car is in the air, the wheel will rotate freely and you will not be able to loosen the nuts.

If a lug nut is stuck, spray it with penetrating oil like WD-40, wait two or three minutes, and try again. Use steady pressure rather than jerking motions — a sudden jerk can round off the nut or break the wrench.

Step 4: Jack up the car until the flat tire is about six inches off the ground

Position the jack under the car's frame near the flat tire. Most cars have a reinforced jacking point marked by a small notch or dimple in the frame. Consult your owner manual if you are not sure where it is. Pump or crank the jack handle until the flat tire is lifted high enough that you can remove it and install the spare. You do not need to lift the car higher than necessary — six inches of clearance is plenty.

Never put any part of your body under the car while it is jacked up. If the jack fails, the car will fall. Keep the jack stable and do not bump it while you work.

Step 5: Remove the lug nuts and take off the flat tire

Now that the car is in the air, finish unscrewing the lug nuts you loosened in Step 3. Remove them completely and set them in a clean place where you will not lose them — a cup holder or a small container works well. Grab the flat tire with both hands at the three and nine o'clock positions and pull it straight toward you. It will come free from the wheel hub. Set it on the ground nearby, out of the way.

The wheel hub will now be exposed. You may see some rust or dirt on it, which is normal. Do not touch the brake components or any moving parts.

Step 6: Install the spare tire and hand-tighten the lug nuts

Lift the spare tire and align the holes in the wheel with the bolts sticking out from the hub. Push the spare straight onto the bolts until it sits flush against the hub. Insert the lug nuts by hand and turn them clockwise until they are snug. Do not use the wrench yet — hand-tighten only. This keeps the wheel centered on the hub while you lower the car.

If the spare is smaller than your regular tires (which is common), it may feel lighter and easier to handle. That is normal.

Step 7: Lower the car and tighten the lug nuts in a star pattern

Slowly lower the jack until the spare tire is fully supporting the car's weight and the jack is no longer holding any pressure. Remove the jack completely. Now use the lug wrench to tighten the lug nuts fully. Tighten them in a star or cross pattern — if you are looking at the wheel, tighten the top nut, then the bottom, then the right, then the left, then the remaining one. This distributes pressure evenly and keeps the wheel centered. Tighten each nut firmly, but do not use all your strength — hand-tight plus a quarter turn is usually right.

Put the flat tire, jack, and lug wrench back in the trunk. Remove the wheel wedges from behind the other tires. You are done.

What to do after you have installed the spare

Most spare tires are temporary and smaller than your regular tires. They are designed to get you to a repair shop, not to be driven indefinitely. Drive slowly — no faster than 50 miles per hour — and avoid highways if you can. Do not make sharp turns or sudden stops. Have the flat tire repaired or replaced within a day or two. Some tire shops will repair a puncture for $15 to $30 if the damage is in the tread and the tire is otherwise sound. If the sidewall is damaged or the tire is old, replacement is the only option.

If you have a full-size spare (some newer cars do), you can drive normally, but still have the flat repaired soon. Check your owner manual to see what type of spare your car carries.

Frequently Asked Questions

What if I cannot loosen the lug nuts by hand?

Spray each nut with penetrating oil and wait three to five minutes. Try again with steady, even pressure on the wrench. If you still cannot budge them, you can place the wrench on the nut and step on the end of the wrench handle to use your body weight for leverage. Never jump on it or use jerking motions — steady downward pressure works better and is safer.

Can I change a tire if the car is on a slope?

No. Always move the car to level ground before you start. A car on a slope can roll even with wheel wedges in place. If you are on a highway and cannot reach level ground, call a towing service instead of risking your safety.

What if the spare tire is also flat?

Check the spare before you need it — do this once a month by looking at it or tapping it with your knuckles. A flat spare is useless. If you discover it is flat only after your main tire goes flat, you will need to call a towing service or a roadside information program. This is why checking the spare regularly matters.

Do I need to retighten the lug nuts after driving on the spare?

Yes. After driving 20 to 30 miles on the spare, stop and use the lug wrench to check that all the nuts are still tight. They can loosen slightly as the wheel settles. Tighten them again in the star pattern if needed.