Parts for your 2005 Daihatsu Terios-Gas struts

2005 Daihatsu Terios gas struts — are they used?

For the 2005 Daihatsu Terios (J100/J102 series), gas struts aren’t a factory‑fitted item. The model uses a side‑hinged rear door with a mechanical door check/stay and, in many markets, a small hydraulic door damper to control swing — not a gas spring. The bonnet is supported by a prop rod, not gas struts. This setup is documented in the Daihatsu Terios J1 Service/Workshop Manual (Body: Doors/Back Door), which specifies a “back door check assembly” and prop rod, and in the Toyota Electronic Parts Catalogue for the Toyota Cami J10 (the Terios twin), which lists door check and damper components but no gas lift supports.

Why no gas struts? The Terios has a side‑opening rear door carrying the spare tyre. With this door geometry, a positive door check with detents is preferred to hold the door steady at set points, and a hydraulic damper can slow the swing so it doesn’t take off in wind. Gas struts are more suited to top‑hinged tailgates and bonnets, where they counterbalance weight and hold the panel up. On the Terios, the bonnet is relatively small and light, so a simple prop rod does the job with less cost and complexity.

What should owners service instead of “gas struts”? Focus on the parts the vehicle actually has:

• Back door check/stay: Inspect for smooth operation and positive detents, replace if the door won’t hold or slams.
• Rear door hydraulic damper (if fitted): Check for leaks or weak damping, replace if the door swings too freely.
• Hinges and latch: Lubricate with suitable grease, check hinge play and adjust latch alignment to prevent rattles.
• Bonnet prop rod and grommets: Ensure the rod locks securely, replace worn clips/grommets.

Aftermarket “gas strut” kits do exist, but they’re modifications rather than OEM parts. If retrofitting, choose a kit engineered for the Terios’ door weight (including the spare), verify clearance and mounting integrity, and recheck operation on slopes and in windy conditions. For most owners, keeping the original door check, damper, hinges and latch in good nick delivers the reliability Daihatsu intended.

• Does a 2005 Daihatsu Terios have gas struts from factory?
  Not from factory. The rear door uses a mechanical door check and often a hydraulic damper, the bonnet uses a prop rod. This is shown in the Terios J1 service manual (Body—Back Door and Bonnet) and Toyota EPC listings for the Cami J10.
• What holds the Terios back door open?
  A door check/stay with detent positions holds it at set openings. Some vehicles also have a small damper that slows the swing, but it doesn’t support weight like a gas strut.
• Can gas struts be retrofitted?
  Yes, as an aftermarket modification. Use a kit designed for the Terios’ side‑hinged door and spare‑tyre load, and have it fitted by a competent technician. Always confirm safe operation on inclines and in wind.