Parts for your 2021 Mitsubishi Eclipse cross-Gas struts

2021 Mitsubishi Eclipse Cross gas struts — what they do and when to replace them

Based on technical sources — including the Mitsubishi Motors workshop manual and ASA parts catalogue for the GK/GL Eclipse Cross (Body: Back Door/Stay) and major aftermarket application guides from Stabilus Lift-O-MAT and Monroe Max-Lift — the 2021 Mitsubishi Eclipse Cross is fitted with two gas-charged struts on the tailgate. The bonnet uses a manual prop rod rather than gas struts. So, gas struts are definitely relevant to this model for the rear hatch/tailgate.

On the 2021 Eclipse Cross, the tailgate gas struts do the heavy lifting. They counterbalance the hatch so it opens smoothly, stays put, and doesn’t slam shut. Charged with nitrogen gas and a little oil for damping, these sealed struts are maintenance-light but work hard every time the tailgate is opened. Over time, seals wear and internal pressure drops, which reduces lift and holding force — most noticeable on cold mornings or windy days.

• Tailgate feels heavy or won’t stay up without a hand
• Slow or jerky opening, especially in cooler weather
• Visible oil mist around the rod/seal area
• Hissing noises, or uneven support side-to-side

Replacement is straightforward and best done in pairs to keep balanced support. Always prop or support the tailgate securely (a helper is gold here). Swap one side at a time, noting orientation — most Eclipse Cross tailgate struts are installed rod-end down to keep the internal seal lubricated. Avoid gripping the chrome rod with pliers and don’t lubricate the rod, any contamination can damage the seals. Clip-on ball-joint ends should snap firmly into place, if reusing hardware, inspect the studs and clips for wear.

As part of regular servicing, a quick functional check is smart: confirm the hatch lifts smoothly and holds at full height for a few minutes. Wipe the rods with a clean, dry cloth — no oils or silicone sprays. Expect typical service life to be five to eight years depending on climate, usage, and how often the vehicle is parked tailgate-up. If one side fails, the other is rarely far behind, so plan on replacing both. Genuine or quality aftermarket struts matched to the Eclipse Cross’s hatch mass will restore that easy, one-hand open-and-hold feel owners expect.

FAQs

How long do the tailgate gas struts last on a 2021 Eclipse Cross?
In normal Aussie and Kiwi conditions, most owners see around five to eight years. Lots of hot sun, dust, frequent use, or loading bikes and gear with the hatch up can shorten that. If the hatch starts sagging or slows right down in the cold, it’s time to replace them.

Do both tailgate struts need replacing together?
Yes — replacing in pairs keeps lift and holding force balanced, avoids twisting the tailgate, and usually restores smooth, even operation. Swapping just one can leave the hatch uneven and still a bit heavy.

Does the 2021 Eclipse Cross bonnet have gas struts?
No. The bonnet uses a prop rod from factory. Aftermarket bonnet strut kits exist, but they’re not OEM. If fitting a kit, use model-specific brackets and hardware and check clearance so nothing fouls the bonnet or guards.