Parts for your 2010 Mazda 3-Gas struts

2010 Mazda 3 gas struts — what they do and when to replace them

Based on factory documentation for the BL-series (2009–2013) Mazda 3 — including the Mazda Workshop Manual (Body: Liftgate) and the Mazda Electronic Parts Catalogue — the 2010 Mazda 3 hatchback is fitted with gas-filled liftgate support struts (also called stays). The bonnet uses a manual prop rod from factory, and the 4‑door sedan’s boot typically uses torsion bars rather than gas struts. Aftermarket bonnet strut kits exist, but they’re not original equipment. So, gas struts are absolutely relevant for the 2010 Mazda 3 hatch’s tailgate.

On the hatch, the gas struts do the heavy lifting, counterbalancing the tailgate so it opens smoothly and stays put without dropping on your head. They’re sealed, nitrogen-charged dampers, and when they get tired the tailgate feels heavy, opens lazily, or won’t hold itself up — especially on cold mornings.

As part of routine servicing, it’s smart to check the struts every 6–12 months. Look for oil misting around the rod seal, listen for squeaks, and test the hold-up force: the tailgate should lift smoothly and remain stable at full height. Temperature affects performance, but if it sags or needs a shoulder shove, the struts are on the way out.

Replacement is straightforward and best done in pairs to keep lift and balance even. Support the tailgate securely (broom, prop, or a helper), pop the metal retaining clips at the ball sockets with a small flat screwdriver, and swap the units one at a time. Clip-on ends snap back over the factory balls — no special tools, no bleeding required. Avoid twisting the rod, keep fingerprints off the chrome shafts, and don’t lubricate the rod itself, a light dab of silicone on the ball studs is fine. Quality OEM‑equivalent struts generally last 5–8 years in typical Aussie and Kiwi conditions.

To extend life, keep the pivot points clean, avoid slamming the tailgate, and don’t use the strut body as a grab handle. If the car has accessories like a heavy roof spoiler, expect to upgrade to higher‑force struts. If the tailgate falls even slightly, treat it as a safety issue and replace them promptly — it’s a quick, affordable fix that makes the Mazda 3 feel new again every time the tailgate opens.

• Common signs they’re due: tailgate drops or won’t stay up, uneven opening, hissing, or oily residue on the shafts.
• Replace in pairs, choose the correct force rating for BL-series hatch, dispose of old struts responsibly as pressurised items.

FAQs

Does a 2010 Mazda 3 have gas struts?
Yes — the hatchback uses gas struts on the tailgate. The bonnet has a prop rod, and the sedan boot typically uses torsion bars, not gas struts.

How long do Mazda 3 hatch gas struts last?
Usually 5–8 years, depending on climate and use. Cold weather and frequent open/close cycles can shorten life. Replace when the tailgate sags or feels heavy.

Can you replace just one gas strut?
It’s possible, but not recommended. Replacing both keeps opening force balanced and prevents the new strut from overworking to compensate for a weak mate.