Parts for your 2025 Mitsubishi Asx-Gas struts

2025 Mitsubishi ASX Gas Struts — What They Do and When to Replace Them

Based on technical references including the Mitsubishi Motors Electronic Parts Catalogue (ASA/EPC) for the AU/NZ ASX and the 2025 ASX owner’s/service information, the vehicle is fitted with gas-filled lift supports (gas struts) on the rear tailgate/hatch. The bonnet on most 2025 ASX variants uses a prop rod rather than gas struts. The EU 2025 ASX (the Captur-based model) and the AU/NZ continuation model both specify rear hatch gas struts in their parts listings and workshop documentation, confirming these struts are relevant service items.

On the 2025 Mitsubishi ASX, gas struts take the heavy lifting out of opening and holding the tailgate up. Each strut is a sealed, nitrogen-charged cylinder with a small amount of oil for damping. Together they counterbalance the hatch, making it easy to lift and stable overhead. Good struts keep the tailgate smooth, quiet and predictable, which is not just convenient—it’s a safety thing, stopping the hatch from dropping on hands, heads or cargo when you’re loading up for the weekend.

Like any wear item, gas struts fade over time as internal seals age and pressure bleeds off. Aussie heat, winter cold snaps in NZ, dusty tracks and frequent use can all speed that up. Signs it’s time to replace include:

• The tailgate feels heavy or won’t stay up, especially in cold weather.
• Jerky movement, squeaks, or a visible oil mist on the strut body.
• Needing to help the hatch the last bit to fully open.

During scheduled servicing, a quick check is smart—open the hatch, observe if it lifts evenly and holds at full height, and listen for any binding. If replacement’s needed, swap struts in pairs to keep balance right. Match the force rating (in Newtons) printed on the original strut, and stick with OEM or quality aftermarket units designed for the ASX tailgate geometry and ball-stud fittings. Always support the hatch with a prop or a mate while changing them—retaining clips pop off easily with a small flat screwdriver, but that hatch is heavier than it looks. After fitting, verify smooth travel and positive hold at full extension. Avoid lubricating the rod, keeping it clean and free of scratches extends seal life. If you’ve added a spoiler or heavier accessories, consider calibrated heavy-duty struts rated for the extra mass.

Popular questions

Does the 2025 Mitsubishi ASX have gas struts on the bonnet?
Most 2025 ASX variants use a prop rod for the bonnet, while the rear tailgate uses gas struts. This layout is reflected in parts catalogues and workshop guides, which list gas springs for the tailgate but not for the bonnet assembly.

If bonnet lift assistance is desired, some owners fit aftermarket bonnet strut kits designed for the ASX. Fitment should follow the kit’s instructions and any workshop safety guidance.

How long do ASX tailgate gas struts last?
There’s no strict interval, but five to ten years is typical. Climate, usage and added weight on the hatch all matter. If the tailgate fails to hold itself up, or performance drops noticeably in cold weather, it’s time.

Technicians generally recommend replacing both struts together and confirming the new pair meets the original force spec for the ASX.

Can heavier-duty struts be fitted if there’s a spoiler?
Yes, but they should be sized correctly. Choose struts with a force rating matched to the added mass so the hatch still closes without excessive slam and opens smoothly.

Overly strong struts can stress hinges and mounts. When in doubt, seek a kit specified for the ASX with the accessory fitted.