Parts for your 2006 Toyota Prius-Gas struts

2006 Toyota Prius gas struts — what they do and when to replace them

Based on technical sources, gas struts are absolutely relevant to the 2006 Toyota Prius. The Toyota 2004–2009 Prius (NHW20) Repair Manual and Toyota Electronic Parts Catalog identify a pair of gas-filled “Stay Assy, Back Door” units fitted to the rear hatch, while the bonnet uses a manual prop rod. Industry application data from common OE suppliers of lift supports also list two rear liftgate struts for this model. So, if it’s a 2006 Prius, the gas struts are on the tailgate/hatch, not the bonnet.

On a 2006 Prius, those rear gas struts make everyday use a breeze by counterbalancing the hatch’s weight. They’re sealed units charged with nitrogen and a small amount of oil, which work together to raise and hold the tailgate smoothly. Over time, seals wear and gas pressure drops, especially with age, frequent use, or exposure to heat and cold. The result? A hatch that lifts lazily, won’t stay up, or drops unexpectedly.

For servicing, it’s smart to treat gas struts as wear items. On a vehicle of this age, the originals are often tired. Replace at the first signs of struggle—don’t wait for the tailgate to come down on someone’s head. Always replace in pairs so the lift and hold are balanced and predictable.

• Common signs they’re due: the hatch won’t stay up, rises slowly or only in warm weather, needs a helping hand, or makes creaks/hisses under load.
• Quick safety check: on a cool morning, open the hatch halfway and let go—if it drops, the struts are weak.

Replacement is a straightforward DIY or a quick workshop job. Support the hatch securely (a second person or a proper prop), then use a small flat screwdriver to ease the spring clips, pop the old struts off the ball studs, and click the new ones on. Don’t remove the clips fully—just lift them enough to release. Fit with the rod pointing down where design allows, as this keeps the seal lubricated. Avoid gripping, scratching, painting, or greasing the shiny rod, a simple wipe with a soft cloth is all the maintenance they need. Re-gassing isn’t typically worthwhile for these sealed units—new struts are the reliable fix.

With fresh gas struts, the Prius hatch opens smoothly, stays put in a breeze, and closes without a fight—much safer for kids, shopping, and everyday use.

FAQs

Do all 2006 Prius models have gas struts, and where are they?
Yes. They’re fitted to the rear hatch (tailgate) as a pair of lift supports. The bonnet on the 2006 Prius uses a manual prop rod, so there are no gas struts under the bonnet from factory.

How long do Prius gas struts last and when should they be replaced?
Typically 5–10 years depending on climate and use. Replace them when the hatch won’t stay up, lifts slowly (especially in cooler weather), or needs a hand to open. It’s best to replace both sides at the same time to keep the opening and holding force even.

Can gas struts be re-gassed, or should they be replaced?
The rear hatch struts on the 2006 Prius are sealed units. While re-gassing exists in some sectors, it’s rarely cost-effective or as reliable. For this model, replacing with quality new struts is the practical, long-lasting solution.