What Subaru Outback Tailgate Struts Do
If your Subaru Outback liftgate suddenly feels heavy, drops too quickly, or will not stay open, the gas struts are usually the problem.
This guide explains how to replace Subaru Outback tailgate struts, what tools you need, and how to confirm the new parts fit your model.
Tailgate struts, also called liftgate gas shocks or hatch support struts, use compressed gas to hold the rear gate open.
On vehicles like the Subaru Outback, they wear out over time from heat, cold, road vibration, and repeated use.
Signs Your Tailgate Struts Need Replacement
Worn struts often fail gradually, which makes the hatch feel inconsistent before it stops working completely.
Common symptoms include:
- The rear liftgate falls faster than usual.
- You need to lift the tailgate with extra effort.
- The hatch will not stay fully open.
- You hear a hissing sound from a strut.
- The tailgate opens unevenly or feels weak near the top.
In cold weather, weak struts may seem worse because gas pressure drops as temperatures fall.
If one side is failing, the other is often close behind.
Before You Start: Confirm the Correct Struts
Not all Subaru Outback model years use the same tailgate struts.
Fit can vary by generation, trim, and whether your vehicle has a power liftgate.
Before ordering parts, check your exact year and compare the old strut length, mounting ends, and part number.
Useful details to verify include:
- Model year and trim level
- Manual or power liftgate
- OEM part number or compatible aftermarket number
- Extended length and compressed length
- End fitting style, such as ball socket or clip-on connector
For the most reliable results, match the replacement struts to the original equipment specifications.
Subaru OEM parts are often the safest choice, but reputable aftermarket brands can also work well if the dimensions and lift force match.
Tools and Safety Preparations
Replacing a tailgate strut is usually a simple driveway job, but the rear hatch is heavy and can drop suddenly if both supports are removed at once.
Work carefully and support the gate before disconnecting anything.
Have these items ready:
- Replacement Subaru Outback tailgate struts
- Flathead screwdriver or trim tool
- Small pick tool, if the retaining clips are tight
- Step stool or helper to hold the hatch open
- Gloves and eye protection
Park on level ground, set the parking brake, and open the hatch fully.
If the old struts are extremely weak, have another person hold the liftgate or use a prop rod for added safety.
How to Replace Subaru Outback Tailgate Struts
The exact design can vary slightly by model year, but the replacement process is similar across most Subaru Outback variants.
The basic task is to release the old strut from the body and hatch ball studs, then snap the new one into place.
Step 1: Support the liftgate
Keep the rear hatch fully open and supported before removing a strut.
If the gate is not secure, do not continue until it is safely propped up.
Step 2: Locate the mounting clips
Each strut typically connects with a socket end that locks onto a ball stud.
Some Subaru models use a small retaining clip or spring clip around the socket.
Inspect both ends so you know how the attachment is secured.
Step 3: Release one end of the old strut
Use a flathead screwdriver or trim tool to gently pry the retaining clip outward, if equipped.
Once the clip loosens, pull the socket off the ball stud.
You usually do not need to remove the clip completely.
Step 4: Remove the second connection
After one end is free, disconnect the other end in the same way.
Keep one hand on the hatch or ask a helper to prevent the gate from shifting.
Step 5: Install the new strut
Position the replacement strut with the cylinder and rod oriented the same way as the old part unless the manufacturer specifies otherwise.
Align the socket over the ball stud and press firmly until it clicks into place.
Step 6: Secure both ends
Repeat the snap-on process at the second mounting point.
Make sure each end is fully seated and the retaining clip, if present, is locked in its normal position.
Step 7: Test the liftgate
Slowly lower and raise the hatch several times to confirm smooth operation.
The gate should open more easily, stay up without drifting, and close with normal resistance.
What to Watch for During Installation
Tailgate strut replacement is straightforward, but a few mistakes can lead to fit problems or weak performance.
Pay attention to these details:
- Do not mix up left and right struts if the parts are side-specific.
- Do not force a socket onto the ball stud at the wrong angle.
- Do not install a strut with incorrect lift force, which can make the hatch too stiff or too weak.
- Do not ignore bent mounting brackets or worn ball studs.
If the ball studs are rusty, loose, or damaged, replace them before installing new struts.
A worn mounting point can cause popping noises or premature failure.
How to Know the New Struts Are Working Properly
After installation, the tailgate should open in a controlled motion and remain fully supported.
Check the following:
- The hatch rises without sagging halfway up.
- Both sides move evenly.
- The liftgate no longer drops unexpectedly.
- The struts do not creak, pop, or bind.
- The hatch closes normally without excessive force.
If the liftgate still feels weak, the replacement parts may be the wrong specification or another issue may be present, such as a damaged hinge, misaligned hatch, or binding latch.
Manual vs. Power Liftgate Considerations
Many Subaru Outback models use a standard manual liftgate, but some trims include a power liftgate system.
The struts themselves may still be mechanically similar, but the total lift force and mounting requirements can differ.
If your Outback has a powered rear gate, check the owner’s manual or service information before ordering parts.
For vehicles with a power liftgate, it is especially important to use parts that match the OEM specification.
Incorrect strut resistance can affect the liftgate motor’s load and reduce reliability.
When to Replace Both Struts
In most cases, replacing both tailgate struts at the same time is the best approach.
Even if one strut appears worse than the other, the pair has usually aged under the same conditions.
Replacing both units helps:
- Restore balanced liftgate support
- Reduce uneven wear on the hatch hinges
- Prevent a second repair soon after the first
- Keep opening and closing effort consistent
Maintenance Tips to Extend Strut Life
Tailgate struts are not serviceable in the traditional sense, but you can help them last longer by keeping the rear hatch hardware in good condition.
Avoid slamming the liftgate, especially in very hot or very cold weather.
Clean dirt and road salt from the hinge area and inspect the mounting points during routine maintenance.
If you live in an area with harsh winters or frequent dust, periodic inspection is worthwhile.
Small issues caught early, such as loose hardware or a weak single strut, can prevent more expensive liftgate damage later.