Parts for your 1999 Daihatsu Terios-Gas struts

1999 Daihatsu Terios gas struts — what’s fitted and what’s not

For the 1999 Daihatsu Terios (J100/J102 series), factory gas struts aren’t used on the bonnet or the rear door. This isn’t guesswork — it’s supported by the Daihatsu Terios J100 Series Service Manual (Body section), the Daihatsu/Toyota Electronic Parts Catalogue (EPC) for J100/J102, and the 1999 Owner’s Manual. Those documents show a side-hinged rear door with a mechanical check strap and stopper, and a bonnet held up by a simple support rod, with no gas stay or gas-assisted damper specified from the factory.

Why no gas struts? The Terios’ rear door is side-hinged and carries the external spare wheel, so it’s engineered around robust hinges and a door check rather than vertical lift. Gas struts are most useful on lift-up hatches and bonnets designed for them. On a side-opening door, a strut would add complexity, see odd side loads, and be more vulnerable off-road. The bonnet setup is similar: a prop rod is light, reliable, and cost-effective, which suited the Terios’ simple, go-anywhere brief.

• Side-hinged rear door with spare: designed for hinges/check strap, not gas stays
• Bonnet: support rod specified, no OE gas struts in manuals or EPC
• Simplicity and durability: fewer failure points for touring and rough roads
• Cost/packaging: keeps weight and servicing costs down

If someone’s searching for 1999 Daihatsu Terios gas-struts as a service item, they’re usually chasing a tailgate that swings too freely or a bonnet that’s hard to manage. On this model, maintenance focuses on what’s actually fitted:

• Rear door: inspect hinges for play, check strap function, stopper torque, latch and striker alignment, and the spare wheel carrier fasteners
• Bonnet: confirm the support rod seats securely, replace worn grommets/clips, and lubricate the latch and hinges
• General: treat hinge pins with a light lubricant, and check door seals for wind noise and water ingress

Got an aftermarket or custom gas stay fitted? That does pop up. Make sure the mounting points are reinforced, the strut force suits the door with the spare fitted, and there’s no interference with wiring or trim. After any retrofit, confirm the door holds open safely on slopes and closes without slamming. In NZ, ensure it won’t create issues at WOF time, in Australia, keep it tidy and secure to stay onside with roadworthy checks.

Technical references: Daihatsu Terios J100/J102 Service Manual (Body: Back Door and Hood sections), Daihatsu/Toyota Electronic Parts Catalogue (J100/J102 body components), and the 1999 Terios Owner’s Manual (bonnet support procedure). These documents list the check strap/stopper for the rear door and a bonnet prop rod, with no gas struts specified for this model year.

Does the 1999 Daihatsu Terios have gas struts from factory?

No. The factory setup uses a side-hinged rear door with a mechanical check strap and a bonnet supported by a prop rod. Gas struts aren’t listed in the service manual or EPC for this generation.

Can gas struts be retrofitted to the Terios rear door?

It’s possible, but it’s a custom job. The rear door carries the spare, so the strut force, brackets, and mounting reinforcement all need to be spot on. Poorly chosen struts can twist panels or make the door hard to close. Get proper hardware and test on slopes.

What should be serviced instead of gas struts on a 1999 Terios?

Focus on hinge wear, check strap operation, latch and striker alignment, and the bonnet support rod’s clips. Lubricate hinges and latches lightly, and keep an eye on door seals for noise or leaks. This is the routine that keeps the Terios feeling tight and safe.