Parts for your 2015 Toyota Mark x-Gas struts

2015 Toyota Mark X gas struts — what’s actually fitted

For the 2015 Toyota Mark X (GRX130 series), factory gas struts are not used on either the bonnet or the boot. Toyota’s technical sources — specifically the Toyota service manual/GSIC for the GRX130 Body Mechanical sections and the Toyota Electronic Parts Catalogue (EPC) — show a bonnet support rod (prop rod) and a torsion-bar boot hinge system, with no “gas stay” assemblies listed for these locations.

Instead of gas struts, the Mark X relies on a simple bonnet prop rod and torsion bars integrated into the boot hinge mechanism to counterbalance the boot lid. These setups are common on Toyota sedans of the era and are well-documented in the Toyota repair literature for the model.

Why didn’t Toyota fit gas struts from factory? A few practical reasons stack up:

• Weight and cost: a prop rod and torsion bars are lighter and cheaper than multiple gas dampers.
• Packaging: the Mark X’s sedan boot hinge geometry suits torsion bars without stealing luggage space or needing brackets for struts.
• Durability and serviceability: a steel rod and torsion system are robust and require almost no maintenance.

Owners who prefer the hands-free feel of gas struts on the bonnet can retrofit aftermarket “hood damper” kits made for GRX130. Go for a kit that’s specifically engineered for the Mark X so the strut force and mounting brackets don’t stress the guards or hinge points. Check clearance at full open and closed positions, and re-torque hardware after the first week of use.

For routine servicing, it’s worth a quick look at the existing hardware: make sure the bonnet prop rod clips are intact, the rod isn’t bent, and the pivot is free of corrosion. For the boot, listen for creaks, confirm the lid holds itself reliably when open, and inspect hinge arms and torsion bar seats for wear. If the boot won’t stay up or feels too heavy, the torsion bar preload may need adjustment — a task best done with the correct service procedure due to stored spring energy.

Does the 2015 Toyota Mark X have gas struts on the bonnet or boot?

No. Toyota’s GRX130 service information and EPC list a bonnet prop rod and a torsion-bar system for the boot. There are no factory gas struts supplied for these areas on the 2015 Mark X.

Can gas struts be retrofitted to the Mark X bonnet?

Yes, aftermarket hood damper kits are available for GRX130. Choose a vehicle-specific kit, follow torque specs, and check for interference at full travel. It’s a straightforward upgrade for most DIYers, or a quick job for a workshop.

What if the boot won’t stay up — is that a gas strut issue?

Not on this model. The Mark X uses torsion bars, not gas struts. If the boot drops or feels heavy, the torsion bar preload may need adjustment or related components may be worn. Have a technician handle it, as the bars store significant energy.