Parts for your 2017 Subaru Forester-Gas struts

2017 Subaru Forester gas struts — what they do and when to replace

Gas struts are relevant to the 2017 Subaru Forester. Technical documentation confirms the SJ-series Forester uses gas-charged stays on the rear tailgate/hatch (see Subaru Factory Service Manual, Body section: Rear Gate – Stay, Subaru Electronic Parts Catalogue listing “Rear Gate Stay (Gas)”, and aftermarket application catalogues such as Stabilus Lift-O-Mat and Monroe Max-Lift for 2014–2018 Forester). Note: the bonnet on this model uses a manual prop rod rather than gas struts.

On the Forester, the tailgate gas struts counterbalance the weight of the rear hatch so it opens smoothly, stays put without sagging, and closes without a heavy slam. They’re nitrogen-charged with a small amount of oil for internal damping. Even models with a power tailgate still rely on gas struts to share the load with the powered actuator.

As part of servicing of the 2017 Subaru Forester gas struts, a quick check saves hassles later. Workshop techs typically look for lazy lift, uneven extension, or any sign the tailgate won’t hold up. Cold mornings can make weak struts obvious. A light wipe of the exposed rod with a clean cloth keeps dust at bay, don’t oil or grease the rod, as that can foul the internal seals. Keep hands clear and always support the tailgate during inspection.

Common signs it’s time to replace:

• The hatch drops or won’t stay up, especially in cooler weather
• Jerky, uneven lift or a “dead spot” mid-stroke
• Hissing, seepage, or oily mist around the rod seal
• One side stronger than the other, causing twist or creak

Replacement is straightforward and usually takes 15–30 minutes. Best practice is to replace in pairs so the forces match. Support the tailgate safely (a second person or a prop), then swap one side at a time, clipping the ball sockets on and off as directed. Use OE-spec or quality aftermarket units with the correct force rating (in Newtons) and stroke. Avoid “uprating” to stiffer struts unless specified, as that can stress hinges and power-lift components. After fitting, open and close the hatch several times so the seals settle, with power tailgates, follow any calibration steps in the service manual.

While the bonnet doesn’t have gas struts on this year, the rear hatch units are a normal wear item at around 5–10 years depending on climate and use, so including them in routine checks is smart.

Popular questions about 2017 Subaru Forester gas struts

Do all 2017 Foresters have gas struts on the rear hatch?
Yes. The SJ-series 2017 Forester uses gas-charged stays on the tailgate across trims. Even vehicles with a power tailgate use gas struts to assist the powered actuator. The bonnet uses a prop rod, not gas struts.

How long do the tailgate gas struts usually last?
Typically 5–10 years, influenced by climate, usage, and how often the hatch is cycled. If the hatch sags, won’t stay up, or feels heavy in cold weather, it’s time to replace—ideally both sides together.

Can gas struts be repaired or re-gassed?
They’re generally non-serviceable. Replacing with new, correct-spec struts is the reliable fix. Re-gassing isn’t recommended due to internal wear and seal integrity.