Parts for your 2017 Toyota Prius-Gas struts

2017 Toyota Prius gas struts — what they do and when to replace them

Technical references confirm the 2017 Toyota Prius is fitted with gas struts on the rear hatch. Toyota’s Repair Manual for the ZVW50/51/55 series (Back Door: Back Door Stay) and the Toyota Electronic Parts Catalogue list two gas-filled “Back Door Stay Assemblies” for the liftback. The bonnet on this model uses a prop rod rather than gas struts.

On a 2017 Prius, the gas struts do the heavy lifting for the hatch, controlling its rise and keeping it safely open while loading groceries, prams, or tools. They’re nitrogen-charged dampers that balance smooth movement with firm hold, so the hatch doesn’t slam in a gust of wind or creep down on a hot day.

As part of regular servicing, it’s worth giving the struts a quick once-over. Wipe the chrome shafts with a clean, dry cloth and avoid spraying lubricants on them—oils attract grit and can damage the shaft seals. If the hatch starts rising slowly, needs a helping hand to open, won’t stay up, or shows a light film of oil around the seals, the struts are on the way out.

• Tell‑tale signs: hatch drops or won’t hold, sluggish or jerky opening, visible oil mist, or hissing/leaks.
• Service tips: check both sides together, keep shafts clean and dry, and support the hatch during any testing.

Replacement isn’t mileage-based, climate and use matter more. In many Aussie and Kiwi conditions, expect 5–10 years, but coastal air, frequent use, or heat can shorten life. When it’s time, replace in pairs so lift and balance stay even. Choose genuine Toyota or a quality aftermarket unit with the correct force rating for the ZVW50-series hatch—going too stiff can stress hinges, too soft won’t hold.

Swapping them is straightforward for a trained tech: safely prop the hatch, pop the retaining clips, change one side at a time, and confirm smooth, even motion on completion. During routine servicing of a 2017 Prius, a quick functional check—open/close effort and hold height—keeps loading safer and the car feeling fresh and easy to live with.

Do the bonnet struts exist on a 2017 Prius?

No—this model uses a bonnet prop rod from factory. Aftermarket bonnet strut kits do exist, but they’re not OEM. If fitting a kit, ensure it’s designed for the ZVW50-series and doesn’t interfere with wiring or bonnet alignment.

How long do Prius hatch gas struts usually last?

There’s no fixed interval, but many owners see 5–10 years. High heat, frequent use, or coastal environments can shorten lifespan. Replace when the hatch won’t hold itself up or opens sluggishly.

Can gas struts be re‑gassed, or should they just be replaced?

For automotive hatch stays, replacement is the standard approach. Re‑gassing isn’t commonly offered or recommended because seal wear and internal contamination usually mean a new unit is the reliable fix.