Parts for your 1994 Toyota Hilux surf-Gas struts

1994 Toyota Hilux Surf gas struts — fitted on the back door and worth keeping fresh

Gas struts are used on the 1994 Toyota Hilux Surf for the top-hinged back door (rear hatch). This fitment is documented in Toyota’s Electronic Parts Catalogue (listed as “Stay, Back Door, LH/RH”), the Toyota 4Runner/Hilux Surf Repair Manual for 1990–1995 (RM184E), and aftermarket application guides from Stabilus (Lift-O-Mat), Monroe and StrongArm that list lift supports for the 1994 4Runner/Hilux Surf. The bonnet on this model uses a prop rod, not gas struts.

On a ’94 Surf, those rear gas-struts do a simple job that makes life easier and safer: they balance the weight of the back door so it lifts smoothly and stays put overhead. In day-to-day use they cop dust, heat, and cold—conditions that slowly knock pressure and performance. As part of regular servicing of your 1994-toyota-hilux-surf gas-struts, it’s smart to cast an eye over them whenever the rear door is up.

Tell-tales they’re getting tired include: the hatch dropping or sagging, especially in cold weather, needing a shove to open the last bit, oily mist on the strut body, clunks or squeaks at the ball sockets. If any of these show up, plan a replacement. They’re a sealed, gas-charged unit—no topping up or rebuild—so replacement is the go. Do both sides together so the door lifts evenly and to the correct rate.

Swapping them is a straightforward DIY with a step-stool and a mate to support the door: pop the spring clips at the ball joints, ease the old struts off, click the new ones on, and ensure each clip is fully seated. Don’t compress a strut by hand or with a vice, and don’t spin the shaft—damage can ruin the seal. Wipe the chrome rods with a clean, dry cloth only, grease or silicone on the rod attracts grit and can chew out the seals. A tiny dab of suitable grease on the ball studs (not the shaft) is fine. If your Surf has a rear spoiler, choose struts rated for that extra weight.

Include the back door operation in routine checks: open fully and let it hold for a minute, listen for joint noise, and check for interference with the rear window wiring. If you’re unsure about fastener torque or the window harness routing, follow the Toyota RM184E procedures or have a workshop handle it.

• Replace in pairs for balance and correct lift.
• Keep rods clean and dry, never paint or lubricate the rod.
• Support the hatch securely during replacement.

Technical sources referenced: Toyota Electronic Parts Catalogue (Body > Back Door > Stay, Back Door LH/RH), Toyota 4Runner/Hilux Surf Repair Manual 1990–1995 (RM184E), Haynes 4Runner Manual 1990–2002, Stabilus Lift-O-Mat and Monroe/StrongArm application data for 1994 4Runner/Hilux Surf.

Popular questions

Does the 1994 Hilux Surf have gas struts on the bonnet?
No—Toyota used a prop rod for the bonnet on this generation. Gas struts are fitted to the back door (rear hatch) only. If the bonnet won’t stay up, check the prop rod grommet or hinge friction rather than looking for struts.

How often should the back-door gas struts be replaced?
There’s no fixed interval. Many last a decade or more, but age, heat and dust take their toll. Replace when the hatch won’t hold itself up reliably, needs extra shove to open, or shows oil weep. Cold mornings often expose weak struts first.

Can just one gas strut be replaced?
It’s technically possible, but not recommended. A new strut paired with a tired one can twist the hatch, stress the hinges, and still feel underpowered. Replacing both ensures balanced lift and proper holding force.