A flat tire can happen on a highway, in a parking lot, or in a driveway. Knowing how to change a flat tire helps a driver respond calmly, but safety comes first: a roadside tire change is only appropriate when the vehicle is on stable, level ground away from traffic. The owner’s manual is the authority for a car’s lifting points, tools, and spare-tire instructions. If the location is unsafe, the car has no usable spare, or the damage is more than a simple puncture, calling for roadside assistance is the better choice.
Before Changing a Flat Tire, Check Whether It Is Safe
As soon as a tire loses pressure, ease off the accelerator, keep both hands on the steering wheel, and avoid sudden braking or sharp turns. Move slowly to a safe, firm, level place, such as a parking lot or a wide shoulder well away from traffic. Do not stop on a curve, in a narrow shoulder, on soft ground, or where the car could be struck. A flat tire can affect steering and braking, so drive only as far as needed to get out of immediate danger.
Turn on the hazard lights and set the parking brake. Put an automatic transmission in Park; put a manual transmission in gear. If the car is on a road shoulder, stay alert to passing traffic and follow local laws about warning devices. Do not stand in a traffic lane to set a warning triangle or retrieve tools. If there is no safe working area, remain in a protected location and contact roadside assistance or emergency services as appropriate.
Never try to change a tire on an unstable surface, and never get beneath a vehicle supported only by a jack. A jack is designed to lift a vehicle for a tire change, not to hold it securely for someone to work underneath. If the ground is sloped, icy, soft, or otherwise unsuitable, wait for professional help.
Gather the Tools and Check the Spare
Most cars equipped for a roadside tire change include a jack and a lug wrench, often stored with the spare tire. Some vehicles use a locking lug nut that requires a matching key. Check the owner’s manual for the tool storage location and the correct jacking points before starting. Useful extras include work gloves, a flashlight, a wheel chock, and a reflective vest, but they do not replace safe positioning.
Check that the spare is present and appears usable. A temporary spare, sometimes called a compact spare or “donut,” may have a different size and lower speed or distance limits than a regular tire. Its sidewall and the owner’s manual specify restrictions; those instructions take precedence over general advice. Some cars have a full-size spare, while others have an inflation kit or run-flat tires and no spare at all. A sealant-and-compressor kit may not work with every puncture, sidewall tear, or damaged wheel.
Spare tires can lose air while stored. If a spare is visibly damaged or flat, do not install it and assume it is safe to drive. A tire-pressure gauge can help check pressure, but the correct pressure should come from the spare’s label or the vehicle’s manual—not automatically from the pressure listed for the regular tires. If the spare is missing or unusable, arrange a tow or mobile tire service.
How to Change a Flat Tire Step by Step
1. Secure the car and prepare the wheel
Park on firm, level ground and keep the car as far from traffic as the location permits. Switch on the hazard lights, apply the parking brake, and select Park or a gear. If available, place a wheel chock or sturdy wedge against a tire that will remain on the ground, on the side opposite the wheel being changed. Keep passengers away from the roadway and the lifting area.
Remove the spare, jack, and lug wrench. Find the vehicle-specific jack point shown in the manual or marked on the vehicle. Jack points vary by model; placing a jack elsewhere can damage the body or cause the car to slip. Do not use a damaged jack, improvise with bricks or a stack of objects, or use a jack on gravel, mud, or soft ground.
2. Loosen the lug nuts before lifting
With the flat tire still touching the ground, fit the lug wrench securely over a lug nut and turn it counterclockwise to loosen it. Lug nuts can be very tight. Apply steady pressure rather than jerking the wrench, and keep a stable stance. Loosen each nut about one turn, but do not remove them yet. If the wrench is slipping, the lug nut is rounded, or a locking-nut key is missing, stop and request help.
Some vehicles have decorative wheel covers or center caps that must be removed to access the lug nuts. Use the method described in the manual; forcing a cover off with the wrong tool can break it. Some wheels also use a specific nut sequence or special hardware, so follow the manufacturer’s directions when provided.
3. Raise the vehicle using the correct jack point
Position the jack at the designated lifting point nearest the flat tire. Make sure the jack base sits flat on firm ground and the vehicle is not leaning. Raise the car slowly, following the jack’s instructions, until the flat tire is just clear of the ground. The vehicle should not move or tilt as it rises. If it shifts, the jack leans, or the ground gives way, lower the car if it is safe to do so and seek assistance.
Do not put any part of the body under the car while it is raised. Keep hands and feet clear of pinch points, and do not use the jack to lift more than the vehicle it was designed for. A properly positioned spare may need a small amount of extra clearance, but lifting the car higher than necessary can make it less stable.
4. Remove the flat and install the spare
Remove the loosened lug nuts and keep them together where they will not roll away. Pull the flat tire straight off the hub. Tires can be heavy, so use a controlled lift and avoid twisting. If the wheel will not come free, do not strike it or put yourself beneath the car; consult the manual or call for roadside help.
Align the spare’s holes with the wheel studs and slide it onto the hub. Hold the wheel in place and thread each lug nut by hand, turning clockwise. Hand-starting the nuts helps reduce the risk of cross-threading. If a nut will not turn smoothly by hand, remove it and try again rather than forcing it with the wrench.
Once all nuts are hand-tight, snug them with the wrench in a crisscross, or star, pattern if the wheel has five or more lugs. For a four-lug wheel, tighten opposite nuts in sequence. This helps seat the wheel evenly. Do not fully tighten the nuts while the tire is off the ground; the wheel may turn or shift.
5. Lower the car and tighten the lug nuts
Lower the vehicle slowly until the spare touches the ground enough to keep the wheel from turning, then tighten the lug nuts in the same alternating pattern. Lower the car fully and remove the jack. Give the nuts a final firm tightening in the specified sequence. The correct torque depends on the vehicle and wheel; use the torque value in the owner’s manual and a torque wrench when available. Do not guess a torque value or use an extension to apply extra force.
Put the flat tire, jack, lug wrench, and any covers or tools securely back in the car. Before moving, check that the spare is seated, the lug nuts are installed, the jack is stowed, and no tools are near the wheels. If the wheel does not sit flat against the hub, a lug nut is missing, or anything seems loose or damaged, do not drive.
Driving After Installing a Spare Tire
Temporary spares are intended to get a vehicle to a repair facility, not to serve as a normal replacement tire. Follow the speed limit printed on the spare’s sidewall and any mileage guidance in the owner’s manual. Compact spares can change handling, braking, and traction, so accelerate, turn, and brake gently. Avoid highways when practical, and do not tow a trailer or carry a heavy load unless the vehicle manufacturer specifically permits it.
Replace or repair the regular tire as soon as possible. If the car has a full-size spare, the manual still determines whether it can be used like the other tires; it may differ in tread, size, or type. After a tire change, check the spare’s pressure at the earliest safe opportunity and confirm that the vehicle’s tire-pressure monitoring system (TPMS) is working. Some vehicles require a TPMS reset or relearn procedure after a wheel change.
Lug nuts can loosen after installation. Follow the vehicle or wheel manufacturer’s instructions about having them rechecked, including the recommended timing and torque. A tire shop can inspect the damaged tire, wheel, and fasteners and advise whether the original tire can be repaired safely or must be replaced.
When to Call Roadside Assistance
Changing a tire yourself is not always the safest or most practical option. Call a roadside service, mobile tire technician, or tow provider when:
- The vehicle is stopped in a narrow shoulder, fast-moving traffic, or another unsafe location.
- The ground is sloped, soft, icy, or unstable, or the jack will not sit securely.
- The spare, jack, lug wrench, or locking lug-nut key is missing or damaged.
- The tire has a sidewall blowout, the wheel is bent, or the car may have suspension damage.
- The lug nuts are stuck, stripped, or cannot be removed with the supplied tools.
- The vehicle is unusually heavy or has special lifting requirements, including some vans, trucks, and electric vehicles.
Electric vehicles and some hybrid vehicles may have battery packs, covers, or designated lift points that make correct jack placement especially important. The owner’s manual must be followed precisely. If the approved lifting point is unclear, or the supplied equipment is not intended for roadside use, do not improvise.
Common Tire-Changing Mistakes to Avoid
Using the wrong jack point can damage the vehicle or make it fall. Removing lug nuts before loosening them on the ground can cause the wheel to spin. Raising the car on a slope or soft shoulder can destabilize the jack. Other avoidable errors include putting any part of the body under a jacked-up car, forcing a lug nut onto a stud, over-tightening with excessive leverage, and driving too fast or too far on a compact spare.
Another common mistake is assuming that every puncture can be repaired. Tire repair depends on where the damage is, its size, the tire’s condition, and the repair standards used by the technician. A repair kit may temporarily seal some tread punctures, but it generally cannot correct a damaged sidewall or a tire that has been driven while severely underinflated. Consult a qualified tire professional before returning a repaired tire to service.
Prepare for the Next Flat Tire
A few checks can make a future roadside problem easier to manage. Learn where the jack and spare are stored, review the tire-changing section of the owner’s manual, and confirm that the spare is inflated to its specified pressure. Keep the lug-nut key with the vehicle tools, not somewhere inaccessible. Checking regular tire pressure monthly and before long trips can help identify a slow leak before it becomes a roadside flat.
Drivers can also save the number for their roadside assistance provider and keep a charged phone in the vehicle. For further guidance, consult the National Highway Traffic Safety Administration’s tire safety resources, the vehicle owner’s manual, and the tire manufacturer’s instructions. Vehicle-specific directions matter because jack locations, spare-tire limits, lug-nut torque, and TPMS procedures differ from one car to another.