Is It Safe to Work Under a Car on Ramps?

What makes ramps safe or unsafe

A ramp holds the car up with its own structure, so there is no hydraulic part to leak or let go. That is a real advantage over a jack alone, which is meant for lifting and not for holding a car while you are under it.

Ramps still fail when the basics are missed. The usual causes are a ramp rated below the car's weight, a slick or sloped surface, a cracked ramp, or a car that rolls because the wheels still on the ground were not secured. Each of these is something you can check before you start.

• The ramp pair is rated for your vehicle's gross weight, not just its curb weight.
• The surface is flat, hard and dry, such as a level concrete garage floor.
• The ramps have no cracks, deep gouges, bends or warped spots.
• The tires sit squarely in the center of each ramp.
• The wheels that stay on the ground are chocked and the parking brake is set.

Set up the ramps step by step

A careful setup takes a few minutes and prevents most problems. Do not rush the drive up, because that is the moment the ramps are most likely to shift.

• Park on a level, hard surface with room to drive straight on. Avoid gravel, dirt, wet pavement and driveways with a slope.
• Inspect both ramps for cracks, damage and debris. Retire any ramp that is damaged.
• Line the ramps up square with the front tires, flat against the tread, with no gap.
• Have a spotter guide you if possible, and drive up slowly and steadily. Do not stop and start, and do not use a burst of throttle.
• Stop when the tires reach the stop at the top of the ramp. Set the parking brake, put an automatic in Park or a manual in gear, and turn the engine off.
• Place wheel chocks behind the rear tires, which stay on the ground.
• Before going under, push on the car from the side. If it shifts or the ramps move, back it down and reset.

Check the specs before you rely on a ramp

Weight rating is the first number to check. It is listed per pair, so compare it with your car's gross vehicle weight, which is usually on the sticker inside the driver's door jamb. A pair rated well above that figure leaves a margin.

Lift height, slope and grip matter too. Rubber feet or non-slip pads help keep the ramp from creeping forward as the tire pushes on it, and a textured surface helps the tire grip. The table below shows how a few listed models differ, using published specs. Our best car ramps page puts all of them on one spec sheet.

Match the ramp to the car and the job

A higher lift gives more room, but it usually means a longer or steeper climb. A low car can scrape its bumper on a steep ramp, so a lower lift or a gentle slope may suit it better. The ROBLOCK listing, for example, lifts 2.6 in and is aimed at low cars, while the TOWKING lifts 7.3 in at a listed 17 degree incline.

Capacity is not a reason to ignore the rest. A high rating does nothing if the ramp slides on a smooth floor or the tire is off center. If you are still choosing, our best ramps for car page lines up capacity, lift and grip side by side so you can compare them for your vehicle.

Safety rules while you are under the car

Keep the work gentle. Hard pulling, prying or wrenching on a stuck bolt can push the car sideways off the ramps. If a fastener will not budge, consider loosening it before you drive up, or use a different method.

Never use a floor jack to raise the car onto or off of the ramps, and do not stack blocks or other objects under a ramp to gain height. Do not add extra support under the car unless the ramp maker's instructions say how. Mixing supports can make the setup less stable, not more.

Wear safety glasses when you look up at the underside, because rust, dirt and fluid can fall in your face. If you work with a running tool or use a grinder, add hearing protection. Keep a clear path out, and keep a phone within reach in case you need help.

How long can a car stay on ramps?

There is no single time limit in the published specs we compare, and a ramp rated for the weight is built to carry it. In practice, the safest habit is to leave the car up only as long as the job needs, then drive it down.

Leaving a car up for days adds risk without any benefit. Someone could bump the car, a ramp could settle on a soft spot, or a child or pet could wander under it. Plastic ramps in particular can be affected by sun and temperature over time, so check the maker's guidance, and do not store a car on ramps.

When to skip the ramps

Ramps are a good fit for oil changes, fluid checks and inspections where the wheels stay on the car. They are not a fit for jobs that need the wheels off, since the ramps hold the car by its tires.

Skip them if the ground is sloped or soft, if the car's weight is close to or over the rating, or if you cannot get the ramps square to the tires. In those cases, choose another method and follow its instructions.

Frequently asked questions

Are car ramps dangerous?

They can be if misused. The common causes are an overloaded pair, a sloped or slippery surface, a damaged ramp, or a car that was not secured. With a rated pair, a level floor and chocks, the risk drops a lot.

Do I need a spotter when driving onto ramps?

It is not required, but it helps. A spotter can tell you if the tires are drifting off center, which is hard to see from the driver's seat.

Should I put my ramps on a wet or sloped driveway?

No. A wet surface lets ramps slide, and a slope can make the car roll. Use a flat, dry, hard surface.

How do I get the car down safely?

Make sure no one is under the car and the path is clear. Start the engine, release the parking brake, and back down slowly in a straight line without braking hard.