Parts for your 1998 Subaru Forester-Gas struts

1998 Subaru Forester gas struts — purpose, care and replacement

Based on technical sources — the Subaru Forester MY1998 Factory Service Manual (Body – Rear Gate, “rear gate stay” procedure), Subaru FAST electronic parts catalogue (Group 63, Stay Assy–Rear Gate), and common aftermarket listings such as Stabilus Lift-O-Mat and Monroe Max-Lift — the 1998 Subaru Forester (SF series) uses gas‑charged struts on the rear gate/hatch. The bonnet on this model uses a manual prop rod, not gas struts. So, gas struts are absolutely relevant to the tailgate of a 1998 Forester.

On the SF Forester, gas struts counterbalance the weight of the rear gate, making it easy to lift and keeping it safely up while loading gear. Inside each strut, compressed nitrogen and a small amount of oil provide smooth, controlled motion. When they’re healthy, the hatch opens with minimal effort and stays put, even in a breeze.

As part of routine servicing, it’s smart to give the rear gate struts a quick check. If the hatch sags, won’t stay up, needs a big shove to open, or drops faster in cold weather, the struts are likely past their best. Any visible oil film on the shaft or sluggish movement are other clear signs. Most technicians replace them as a pair to keep lift and balance even across both sides.

Replacement is straightforward but safety matters. Always support the hatch with a prop or a mate before removing a strut — they’re under high pressure and the tailgate is heavier than it looks. Pop off the retaining clips at the ball joints, swap the units like-for-like, and refit the clips securely. Follow the service manual for bracket fastener torque and make sure the ball studs and brackets aren’t worn or loose. Avoid cheap “near enough” lengths or force ratings, the SF Forester needs the correct stroke and Newton rating to operate properly.

Maintenance is minimal: keep the shiny shafts clean and free of grit, don’t lubricate them (oils and grease can damage seals), and avoid slamming the hatch. Re-gassing old units generally isn’t recommended, modern gas springs are sealed and are best replaced when weak. With quality replacements fitted, the Forester’s rear gate will lift smoothly and stay up like it should, making day-to-day use safer and easier.

• Common signs to replace: hatch won’t stay up, slow lift, oil mist on shaft, worse performance in cold weather.
• Best practice: replace in pairs, verify correct length and force, and support the hatch during work.

Popular questions about 1998 Subaru Forester gas struts

How long do rear hatch gas struts typically last?
Service life varies with use and climate, but many owners see 5–10 years. Frequent opening, heat, and dust can shorten life. If the hatch hesitates, sags, or needs help staying up, it’s time to change them rather than wait for a surprise drop.

Should they be replaced in pairs?
Yes. Replacing both keeps lift and damping even on each side, reduces twist on the hinges, and restores the intended opening feel. Mixing an old strut with a new one often leads to uneven operation and quicker wear.

Can they be re-gassed or adjusted?
The SF Forester’s hatch struts are sealed units. They’re not designed for re-gassing or pressure adjustment. For reliable performance and safety, fit new, correctly rated replacements that match the original length and force.