Parts for your 1997 Toyota Hilux surf-Gas struts

1997 Toyota Hilux Surf gas struts — what they do and when to replace

Gas struts are fitted to the 1997 Toyota Hilux Surf’s rear hatch (back door). Toyota’s own technical literature confirms this: the Factory Service Manual for the N185 series (KZN185/RZN185/VZN185) Body section lists “Back Door Stay” removal/installation, and the Toyota Electronic Parts Catalogue for Hilux Surf N185 lists the right and left “Stay, Back Door” assemblies (gas‑charged lifts). The bonnet on this model uses a manual prop rod, not gas struts.

On the Hilux Surf, the gas struts counterbalance the weight of the rear hatch (which also carries the power rear window), so it lifts smoothly and stays up without drama. When they’re healthy, the hatch opens cleanly and holds position. When they’re tired, it sags, drops in cold weather, or needs a helping hand to stay up—never fun when loading the boot at Bunnings or the beach.

Typical signs it’s time to replace:

• Hatch falls or won’t stay fully open, especially in colder temps.
• Slow or jerky opening, or a “heavy” feel from halfway up.
• Oil mist on the strut shaft, or obvious dents/nicks on the rod.

Replacement is straightforward and best done in pairs. Use a prop or a helper to support the hatch. Flick up the retaining clips at each end of the old strut with a small flat screwdriver, pop the strut off the ball studs, then press the new one on until it clicks. Keep fingers clear of the hinge area and glass. Don’t grip the chrome rod with pliers, and don’t lube the rod—any grease or silicone can damage the seals and shorten life. Orient the strut so the rod end points downward when the hatch is closed, that keeps the internal seal lubricated and helps longevity.

There’s no scheduled service interval—replace when weak. Aftermarket units are cost‑effective and work well, choose the correct spec for your Surf’s setup (some have rear spoilers or ladders that add weight). If one side has failed, the other isn’t far behind, so swap both to restore balanced lift. A quick wipe of the rods with a clean, dry microfibre now and then keeps dust off and protects the seals.

One last note: the bonnet on the 1997 Surf uses a prop rod. Bonnet gas struts weren’t factory on this model, though retrofit kits exist if that’s on the wish list.

Does the 1997 Hilux Surf have bonnet gas struts?

No. The bonnet uses a manual prop rod from factory on the N185-series Hilux Surf. The gas-charged struts are for the rear hatch. Some owners fit aftermarket bonnet strut kits, but they’re not OEM equipment.

How long should the rear hatch gas struts last?

Anywhere from 5–10 years is common, but age, heat, cold, and how often the hatch is used all play a part. Cold mornings tend to expose weak struts. If the hatch drifts down or won’t stay up, it’s time to replace both sides.

Can the original struts be re-gassed, or should they be replaced?

Most are sealed units, while re-gassing is possible in theory, it’s rarely cost‑effective or long‑lasting compared with new replacements. For the Hilux Surf, quality aftermarket or genuine replacement struts are usually the smarter, quicker fix.