When a Hiace Tailgate Won't Stay Up
A tailgate that sags, drifts down or drops is almost always a worn pair of gas struts. Which pair you need depends on the body width and roof height, not just the year.
A Toyota Hiace tailgate that drifts down while you are loading, or drops without warning, is almost always a worn pair of gas struts. It is one of the few van faults that gets worse in a predictable, linear way — and one of the easiest to get wrong when ordering, because the H200 took three different strut pairs depending on how the van was built.
Why does a Hiace tailgate stop staying up?
Because the gas struts have lost pressure. A gas strut holds a tailgate open using compressed nitrogen behind a piston. The seal around that piston wears, the gas escapes slowly, and the strut's ability to hold weight falls away over years rather than suddenly.
The progression is recognisable:
- The tailgate still holds, but needs a firmer push to get there.
- It holds in warm weather and sags in the cold — gas pressure falls with temperature, so winter exposes a strut that is already weak.
- It drifts down slowly on its own.
- It will not stay up at all.
Struts are fitted in pairs and wear at a similar rate, so replace both at once. Fitting one new strut against one tired one puts the whole load on the new one and twists the tailgate on its hinges.
This is a safety issue rather than an inconvenience. A tailgate that drops onto someone loading the van is a real injury, and a partly-supported tailgate can come down suddenly when the last of the gas goes.
Which tailgate struts does my Hiace take?
On the Toyota Hiace H200, the strut depends on the body width and the roof height — not just the year. A heavier, taller tailgate needs a stronger strut, so the van's build determines which pair fits.
Car Parts Market stocks all three combinations, listed as left-hand and right-hand parts:
- Narrow body, low roof — listed as "Tailgate gas strut (standard)", in LH and RH.
- Wide body, mid roof — listed as "Tailgate gas strut (wide-body, mid roof)", in LH and RH.
- Wide body, high roof — listed as "Rear door strut (wide-body, high roof)", in LH and RH.
"Standard" in the old listing language means the narrow-body, low-roof van — the most common H200 configuration in New Zealand.
Every one of these six products carries its body width and roof height as recorded catalogue data, so the listing tells you which van it suits rather than leaving you to infer it from the title.
How do I tell a narrow body from a wide body?
Look at the rear wheel arches and the track. A wide-body Hiace is visibly broader across the rear, with the body flaring out past the cab line and a wider rear track. Park it next to a narrow-body van and the difference is obvious; on its own it is less so.
The most reliable method is the compliance plate, which records the body dimensions, or the chassis code and model grade for a Japanese import.
Roof height is easier. A low-roof Hiace is a van you cannot stand up in. A mid roof raises the line noticeably above the cab. A high roof is unmistakable — designed to be stood up in, and usually obvious from twenty metres.
If you are unsure, send the registration or chassis number through and have it confirmed before ordering. A strut for the wrong roof height will either fail to hold the tailgate or hold it under too much tension.
Are tailgate struts a WoF item?
Not directly. Gas struts are not among the lamp, mirror, brake or structural items the warrant of fitness inspection lists as reasons for rejection.
They can still contribute indirectly. A tailgate that will not stay open, or that has been propped with a length of timber, invites a closer look at the rear door, its hinges and its latch — and those are inspected. A strut that has torn its mounting ball out of the tailgate has also damaged the panel it was mounted to.
The practical case for replacing them is not the WoF. It is that a heavy panel held up by nothing is a hazard to whoever is standing under it.
How are gas struts replaced?
Strut replacement is a straightforward job on most Hiace tailgates, but it is a two-person one:
- Open the tailgate fully and support it. Have a second person hold it, or prop it securely. Once one strut is off, the other cannot hold the panel alone.
- Release the retaining clip. Most struts attach to a ball stud at each end with a spring clip that levers out with a small flat screwdriver.
- Pull the strut off the ball stud at each end and remove it.
- Check the ball studs while the strut is off. A stud that is loose in the panel, or worn oval, should be dealt with before the new strut goes on.
- Fit the new strut with the piston rod facing down where the original did. Fitting a gas strut upside down shortens its life, because the seal relies on sitting in the oil.
- Press each end onto its stud until the clip snaps home, then check it by pulling gently.
- Repeat on the second side, then open and close the tailgate several times.
If the ball studs have pulled out of the panel, that is a panel repair rather than a strut job.
Ordering the right pair
Browse Toyota Hiace tailgate parts, the full tailgate category, or go direct to the pair that matches your van:
Each of those is the left-hand strut; its right-hand partner is listed alongside it in the same category. Struts are sold individually, so a full replacement is two items. All six are recorded against the Toyota Hiace H200.
Car Parts Market is based at 11A Akatea Road, Glendene, Auckland. Orders ship throughout New Zealand and to Australia — see delivery — and click and collect is available from the Glendene warehouse. New aftermarket parts carry a three-month warranty; terms and conditions apply. To have fitment confirmed against your van, email support@carpartsmarket.co.nz or phone 09 243 1350.
Frequently asked questions
Why won't my Toyota Hiace tailgate stay up?
Almost always because the gas struts have lost pressure. The seal around the piston wears and nitrogen escapes gradually, so the tailgate first needs a firmer push, then sags in cold weather, then drifts down on its own. Struts wear in pairs and should be replaced in pairs.
Should I replace both Hiace tailgate struts at once?
Yes. Struts are fitted as a pair and wear at a similar rate, so a strut that has failed means its partner is close behind. Fitting one new strut against one tired one puts the whole tailgate load on the new strut and twists the panel on its hinges.
Which tailgate strut fits a wide-body Hiace?
It depends on the roof. A wide-body Toyota Hiace H200 with a mid roof takes the wide-body mid-roof strut; a wide-body high-roof van takes the rear door strut for that configuration. Car Parts Market records body width and roof height on each listing, so the product states which van it suits.
Do worn tailgate struts fail a WoF?
Not directly — gas struts are not a listed reason for rejection. But a tailgate propped open or held by hand invites closer inspection of the rear door, hinges and latch, which are checked. The stronger reason to replace them is safety: a heavy panel with nothing holding it up can drop onto whoever is loading.
Can I fit Hiace tailgate struts myself?
Usually yes, with a second person to support the tailgate. Each end clips onto a ball stud and releases with a small flat screwdriver. Fit the new strut with the piston rod facing down as the original did, and check the ball studs for wear while the strut is off.