Parts for your 2005 Mazda Premacy-Gas struts

2005 Mazda Premacy Gas Struts — Purpose, Service and Replacement

Gas struts are absolutely relevant to the 2005 Mazda Premacy. Technical sources including the Mazda Premacy/Mazda5 workshop manual (Body: Liftgate/Back Door section) and the Mazda Electronic Parts Catalogue list left and right “Back Door Stays” (gas-filled dampers) for the rear liftgate. The same sources show the bonnet uses a conventional prop rod rather than gas struts, which is typical for this model. Aftermarket catalogues from major gas spring manufacturers also list lift supports for the 1999–2005 Premacy and early 2005 second‑gen vehicles, confirming fitment.

On the Premacy, gas struts do the hard work of holding the rear liftgate safely open and assist with a smooth, controlled rise and fall. They’re sealed, nitrogen-charged units with internal oil and valving, designed to deliver consistent support across a wide temperature range—handy in Aussie and Kiwi climates where mornings can be chilly and afternoons warm.

Like any wear item, they gradually lose pressure. Typical signs they’re due for replacement:

• Liftgate sags, won’t stay up, or drops unexpectedly—especially in cold weather.
• Needs a big shove to open, rises slowly, or feels uneven side-to-side.
• Visible oil weep around the rod seal, or a faint hiss and poor damping.

As part of routine servicing, give the struts a quick check: open the liftgate fully and see if it remains firm without drifting down. Inspect the ball joints and clips for corrosion, and the rod for nicks—don’t grease the rod, keep it clean and dry. A light silicone spray on the joint sockets is fine, but avoid contaminating the chrome rod.

When replacing, it’s best to do both sides together to keep balanced support. Support the liftgate securely (a helper or prop is essential), then flick out the retaining clips at the ball ends and pop the old units off. Click the new struts on with the rod end up where specified, confirm the clips are fully seated, and check smooth operation. Don’t twist the body or clamp the rod with pliers—it’ll ruin the seal. For coastal areas, consider struts with stainless or corrosion-resistant rods, and stick to OE-equivalent force ratings so the latch and hinges aren’t overworked.

Quality aftermarket or OE-spec gas struts typically last many years, if the boot gets daily use or the vehicle often parks nose-up on a slope, expect a shorter service life and test them at each service.

Popular questions about 2005 Mazda Premacy gas struts

Do 2005 Mazda Premacys have gas struts on the bonnet?
No. Technical manuals for the Premacy specify a prop rod for the bonnet. Only the rear liftgate uses gas struts (“Back Door Stays”). If the bonnet doesn’t stay up, check the prop rod seating and grommets rather than looking for struts.

How often should the liftgate struts be replaced?
There’s no fixed interval—most last 5–10 years. Replace when the hatch won’t stay up, feels weak, or shows oil weep. In colder regions or with heavy daily use, expect earlier replacement. Test them at each service.

Can just one strut be replaced?
It’s possible, but replacing in pairs is recommended. Matching new left and right struts keeps lift effort even, prevents twist on the hinges, and generally gives a longer-lasting, smoother action.