Tailgate Strut Replacement Guide Mechanics Swear By
- 01. Tailgate Strut Guide: The Mistake Most People Make
- 02. What tailgate struts do
- 03. Signs replacement is needed
- 04. Tools and prep
- 05. Replacement process
- 06. Most common mistake
- 07. Safety and failure risks
- 08. Typical labor time
- 09. Choosing the right parts
- 10. When to call a mechanic
- 11. Practical takeaway
Tailgate Strut Guide: The Mistake Most People Make
If your tailgate is falling, sticking, or no longer staying open, the fix is usually to replace the gas struts as a pair, support the lid securely before disconnecting anything, and match the new parts to the original length, end fittings, and force rating. The mistake most people make is replacing only one strut or removing the old strut before the tailgate is safely propped, which can cause misalignment, poor lifting, or an injury risk.
Mechanics treat tailgate strut replacement as a small job with big consequences because these parts carry the weight of the hatch every time it opens. A clean installation usually takes 20 to 45 minutes for a straightforward manual tailgate, while power or assisted liftgates can take longer because trim panels, wiring, or calibration may be involved.
What tailgate struts do
Tailgate struts, also called gas struts or lift supports, are pressurized cylinders that help raise the hatch and hold it in position. When they weaken, the tailgate may drop quickly, fail to stay open in cold weather, or need a hard shove to close properly.
In practical shop terms, a worn strut is one of the easiest body repair issues to diagnose because the symptoms are obvious and repeatable. If the tailgate opens fine one day and sags the next, the problem is often gas strut wear rather than the latch, hinges, or wiring.
Signs replacement is needed
Most mechanics look for a short list of symptoms before recommending new struts. These symptoms usually get worse in cold weather because gas pressure drops and the weakened strut loses even more lifting force.
- The tailgate will not stay fully open.
- The hatch drops faster than it used to.
- One side of the tailgate sits lower than the other.
- The tailgate feels heavy at the start of the lift.
- You hear a hiss, see oil residue, or notice a damaged rod.
Industry repair guides commonly note that gas struts are typically replaced in pairs, because a new strut on one side and a tired strut on the other can make the hatch twist during opening and closing. That uneven loading can accelerate wear on the hinge mounts and make the whole assembly feel sloppy.
Tools and prep
You do not need advanced equipment for a standard manual tailgate job, but you do need to control the hatch safely. A helper, a prop rod, or a padded support stand makes the work much safer because a disconnected tailgate can drop without warning.
| Item | Purpose | Mechanic note |
|---|---|---|
| Replacement struts | Restore lift and hold force | Match length, end fittings, and force rating |
| Flathead screwdriver or trim tool | Release retaining clips | Use gentle pressure to avoid bending the clip |
| Helper or prop support | Hold the tailgate open | This is the safest step on nearly every vehicle |
| Gloves and cloth | Protect hands and paint | Useful near painted edges and greasy fittings |
Before buying parts, read the number stamped on the old strut body and compare the new one by length and mounting style. A 2025 parts-supplier guide emphasized that the right replacement should match the original model closely, especially on vehicles with ball-socket ends, clip retainers, or integrated brackets.
Replacement process
The basic job is simple: support the tailgate, release the old strut, install the new one, and test the motion. The exact clip style varies by vehicle, but the general sequence is very similar across hatchbacks, SUVs, wagons, and vans.
- Open the tailgate fully and secure it with a helper or support.
- Inspect both struts for leaks, dents, or worn clips before removal.
- Release the retaining clip or socket from one end of the strut.
- Disconnect the strut and repeat the process on the other end.
- Install the new strut in the same orientation as the old one.
- Snap or bolt both ends into place and confirm the retainers are seated.
- Repeat the replacement on the second side if the vehicle uses a pair.
- Test the tailgate several times for smooth lift, hold strength, and alignment.
Most technicians recommend replacing both sides together because a mixed set can create an uneven opening arc and a false diagnosis later if the old side fails soon afterward. On some vehicles, the faster side will actually mask the weakness of the new side until the hatch starts tilting or binding.
Most common mistake
The most common mistake in tailgate repair is removing the old strut before the hatch is physically supported. Once the gas pressure is removed, the tailgate may collapse suddenly, especially on larger SUVs or vans where the lid weighs much more than it appears.
The second most common mistake is buying the wrong replacement because the outside dimensions look similar. Struts that are too short, too weak, or fitted with the wrong end connector can cause poor lift performance, premature wear, or a hatch that won't latch correctly.
"A tailgate strut is only as good as its match to the vehicle," one practical service rule goes, because small differences in force and geometry are enough to change the feel of the entire liftgate.
Safety and failure risks
Gas struts contain pressure, so they should not be punctured, heated, or forced apart. If one rod is bent or the cylinder is leaking oil, the part should be replaced rather than reused, because damaged struts can fail without much warning.
Mechanics also warn against letting the hatch hang on one remaining strut while you work. That creates side-load stress, which can damage the hinge bracket, distort the socket, or crack the plastic trim around the mounting point.
Typical labor time
For a straightforward manual tailgate, a careful DIY replacement often takes less than an hour, and an experienced technician may finish in well under 30 minutes. Electric liftgates, foot-activated gates, and vehicles with hidden trim fasteners can take longer because access is more complicated and some systems need a reset afterward.
| Vehicle type | Typical time | Difficulty |
|---|---|---|
| Basic hatchback | 20-30 minutes | Low |
| SUV or wagon | 30-45 minutes | Low to moderate |
| Electric liftgate | 45-90 minutes | Moderate to high |
These time ranges reflect common workshop experience rather than a fixed industry standard, but they are a useful planning guide. The more trim, wiring, or calibration involved, the more likely the job becomes a professional repair instead of a simple driveway swap.
Choosing the right parts
When shopping for replacement supports, focus on part number, compressed length, extended length, end fittings, and rated force. The force rating matters because a strut that is too strong can make the hatch pop up aggressively, while one that is too weak will not hold the lid open safely.
- Match the original part number whenever possible.
- Compare both the compressed and extended lengths.
- Check whether the ends use ball sockets, clips, or bolt-on brackets.
- Replace in pairs unless the manufacturer clearly says otherwise.
- Confirm the force rating before installation.
If the tailgate has accessories such as a spoiler, bike rack mount, or aftermarket glass frame, the added weight can change the required strut force. That is why a part that "looks right" can still perform badly once installed.
When to call a mechanic
Most tailgate strut jobs are safe for a confident DIYer, but there are times when a mechanic is the smarter choice. If the tailgate is powered, the trim is heavily integrated, the glass panel is separate, or the vehicle uses an active lift assist system, professional service can prevent wiring damage and alignment issues.
A shop visit is also wise if the hatch still sags after new struts are installed, because the real fault may be a bent hinge, damaged socket, or latch problem. In that case, replacing the struts alone only treats the symptom, not the cause.
Practical takeaway
A proper strut replacement is less about brute force and more about matching the correct parts, supporting the tailgate safely, and installing both sides evenly. The best results come from treating the job like a precision fit rather than a quick swap, because the tailgate's balance depends on both geometry and pressure.
For most mechanics, the winning formula is simple: support the lid, replace both struts, verify the part numbers, and test the hatch several times before calling the job done. That approach avoids the most common mistake and restores the smooth, controlled motion that a healthy tailgate should have.
Helpful tips and tricks for Tailgate Strut Replacement Guide Mechanics Swear By
Can I replace only one tailgate strut?
You can in some cases, but it is usually better to replace both at the same time because paired wear keeps the hatch balanced and prevents one old support from overworking the new one.
Do tailgate struts need to be installed in a certain direction?
Yes, the original orientation should be copied unless the manufacturer specifies otherwise, because rod position and mounting angle can affect sealing, lubrication, and long-term life.
Why does my tailgate still fall after new struts?
If fresh struts do not solve the problem, the issue may be a bent hinge, worn socket, incorrect part rating, or a latch that is adding extra resistance.
Are tailgate struts dangerous to remove?
They can be if the hatch is not supported, since the tailgate may drop suddenly once the strut is disconnected.