Knowing where to place a jack under a car is the most critical safety step before changing a tire or performing undercarriage work. Locating the manufacturer’s designated jacking points protects your vehicle’s undercarriage from costly damage. Using the wrong spot can bend your frame, puncture the floor, or cause the vehicle to fall. This guide will show you exactly how to find these points on any vehicle.
We will cover everything from consulting your owner’s manual to identifying visual and tactile clues. You’ll learn the difference between a jack stand and a jack, and why you should never rely on a jack alone. Let’s get started with the basics.
Where To Place A Jack Under A Car
The core answer to where to place a jack under a car is always at the manufacturer’s specified jacking points. These are reinforced sections of the vehicle’s frame or unibody designed to handle the concentrated weight. They are not random spots you guess. Using them correctly ensures stability and prevents expensive repairs to components like brake lines, fuel tanks, or the exhaust system.
Your Owner’s Manual Is The First Source
Before you even slide under your car, grab the owner’s manual. It is the definitive guide for your specific make, model, and year. The manual will have a diagram or section dedicated to “jacking” or “tire changing.” It precisely illustrates the location of front and rear jacking points. If you’ve lost your manual, a quick online search for “[Your Car Year, Make, Model] owner’s manual PDF” will usually find a digital copy.
Common Types Of Jacking Points
Most modern vehicles use one of a few common jacking point designs. Recognizing them helps when your manual isn’t handy or the points are dirty.
- Pinch Welds: A vertical seam of reinforced metal running along the side of the car, just inside the rocker panel. It often has a small notch or plastic cover. This is extremely common on unibody cars.
- Frame Rails: On trucks and body-on-frame SUVs, these are the two main, thick steel beams running the length of the vehicle. You place the jack on a flat, solid section of the rail, avoiding any curves, bolts, or lines.
- Dedicated Jack Pads: Some vehicles, particularly luxury brands, have built-in plastic or rubber pads that mark the jack point. The factory jack often has a slot that fits these pads perfectly.
- Front Crossmember or Rear Differential: For floor jacks, the central front crossmember or the solid rear differential housing (on rear-wheel-drive vehicles) are often safe, reinforced lift points. Always verify this in your manual first.
Visual And Tactile Identification
If you don’t have the manual, look and feel for the jack points. Clean away dirt from the rocker panel area. Look for:
- A distinct, vertical metal seam (the pinch weld).
- Small plastic or rubber squares or rectangles.
- Notches or cut-outs in the plastic side skirt.
- Reinforced metal sections that feel more solid than the thin sheet metal around them.
Run your hand along the frame rail or rocker panel. You will feel the difference between flimsy body metal and the sturdy, thick jack point. Never jack on plastic body panels, the oil pan, the exhaust pipe, or any component that looks fragile or has lines running to it.
Why Pinch Welds Are So Common
Pinch welds are the standard for most sedans, hatchbacks, and crossovers. They are part of the vehicle’s unibody structure and are strong enough to support the car’s weight. When using a pinch weld, ensure your jack or stand has a groove or slot to cradle the weld without crushing it. A flat jack head can bend the weld over time.
Tools For The Job: Jacks Vs. Jack Stands
This is a non-negotiable safety distinction. A hydraulic or scissor jack is for lifting the vehicle only. A jack stand is for supporting the vehicle while you work. You must use both together for any task that requires you to go under the car.
- Scissor Jack: Comes with the car for emergency tire changes. It’s small and unstable. Use it only for quick tire swaps on solid, level ground, and never get under the vehicle.
- Hydraulic Floor Jack: A low-profile trolley jack is the best tool for home mechanics. It lifts smoothly and from a stable base. It is still only for lifting.
- Jack Stands: These are your safety net. Once the car is lifted, you immediately lower it onto a set of jack stands rated for your vehicle’s weight. Then, give the car a solid shake to test stability before working.
Step-By-Step Guide To Safe Jack Placement
1. Prepare Your Vehicle And Workspace
Park on a firm, level, concrete surface. Avoid asphalt on a hot day, as it can soften. Engage the parking brake firmly. If you’re changing a tire, place wheel chocks (or large wooden blocks) against the wheels that will remain on the ground. For example, if lifting the front right wheel, chock the rear left wheel. Put the car in “Park” (automatic) or first gear (manual). Gather all your tools before starting.
2. Locate The Correct Jacking Point
Refer to your manual or use the identification tips above. For a tire change, you will use the jack point nearest the flat tire. For broader undercarriage access, you may use a central front or rear point with a floor jack. Clear any debris from around the point. If using a pinch weld, ensure it’s not rusted through; significant corrosion compromises its strength.
3. Position The Jack Correctly
For a scissor jack, align its saddle (the top part) with the notch or reinforced section of the pinch weld. Crank it until it just makes contact. For a floor jack, roll it so the saddle centers directly under the jack point. If using a frame rail, pick a flat section. Many floor jacks have a rubber pad or a groove—use it to protect the vehicle’s metal.
4. Lift The Vehicle Slowly
Pump the floor jack handle or turn the scissor jack crank steadily. Watch the vehicle as it rises. Ensure the jack remains centered and doesn’t slip or tilt. Stop lifting once the tire is about 2-3 inches off the ground for a change, or high enough to place your jack stands. Do not lift higher than necessary.
5. Place Jack Stands Immediately
Once lifted, slide your jack stands into position. They should go on a secondary, equally solid point near the jack. Often, there is a dedicated stand point just inboard of the jacking pinch weld. Never place a jack stand on the same pinch weld notch you used for the jack, as it can distort. Lower the car slowly onto the stands by reversing the jack.
6. Perform A Stability Test
With the vehicle’s weight fully on the jack stands (the jack can be slightly tensioned as a backup), push and pull on the car’s bumper or frame. It should feel rock-solid. If it wobbles or the stands shift, lift the car again and reposition the stands on a more level, solid part of the frame. Only when it’s stable should you begin your work.
Specific Vehicle Considerations
Lifting A Truck Or SUV
These heavier vehicles have strong frame rails. Place the jack on a flat, clean section of the front or rear frame, avoiding brake lines or fuel lines often routed along the frame. For the rear, the solid differential housing is a common and safe point for a floor jack. Always use heavy-duty jack stands rated for the truck’s weight, which can be 6,000 lbs or more.
Lifting A Sports Car Or Low Vehicle
Low-clearance cars require a low-profile floor jack to fit underneath. Their jack points are often very specific due to aerodynamic body kits. Consult the manual carefully. Some have front and rear central lift points that, when used with special pads or adapters, allow you to lift the entire side of the car at once. Precision is key here to avoid damaging expensive carbon fiber or body panels.
Using A Lift Point Adapter
An adapter is a rubber or polyurethane puck that sits on your jack’s saddle. It’s designed to cradle pinch welds or fit into specific jack pads without causing damage. If you work on different vehicles, a set of adapters is a wise investment. They protect your car’s undercarriage and provide a more secure connection.
Critical Mistakes To Avoid
- Jacking On The Rocker Panel: The painted metal behind the doors is not structural. It will crumple instantly.
- Using Only The Jack: Hydraulic jacks can fail. Never trust your life to a hydraulic seal. Jack stands are essential.
- Ignoring The Surface: Lifting on gravel, dirt, or a slope is asking for the car to shift and fall.
- Over-Lifting: Lifting a tire too high makes it unstable and puts extreme stress on the suspension components.
- Using Improper Supports: Concrete blocks, wood logs, or cinder blocks can fracture or split. Use only purpose-built jack stands.
FAQ Section
Where Are The Jack Points On A Car Usually Located?
They are typically found along the side of the vehicle, just inside the front and rear wheels. Look for the reinforced pinch weld seam or consult your owner’s manual for the exact diagram. Some cars also have central front and rear points for use with a floor jack.
Can I Jack Up My Car From The Rear Differential?
On most rear-wheel-drive cars and trucks, the solid rear differential housing is a safe and strong point for a floor jack. However, this is not true for front-wheel-drive cars, which have a lighter-weight rear axle assembly. Always check your manual to confirm.
Is It Safe To Jack Up A Car On The Side Of The Road?
For an emergency tire change using the factory scissor jack, yes—but take extra precautions. Find the flattest, most solid ground possible. Turn on your hazard lights. Place the jack exactly on the designated point shown in your manual. Never place any part of your body under a vehicle supported only by a scissor jack.
How Many Jack Stands Do I Need?
You should have at least two jack stands. If you are lifting the entire front or rear of the car, you need two stands to support it safely. For maximum safety when working extensively underneath, some mechanics use four stands to support the vehicle at all four corners.
What Should I Do If My Jacking Point Is Rusted?
Significant rust that has eaten through the metal compromises its strength. Do not jack there. In this case, you may need to use an alternative reinforced point, like the front subframe or a main frame rail, but this is a job for a professional. Have a mechanic inspect the undercarriage and recommend a safe solution.
Finding where to place a jack under a car is a fundamental skill that ensures your safety and your vehicle’s integrity. The rule is simple: always use the manufacturer’s designated points. Take your time to locate them correctly, use a jack in combination with sturdy jack stands, and always test for stability before starting any work. This knowledge empowers you to handle basic maintenance and emergencies with confidence, knowing you’ve protected yourself and your investment from harm.