Parts for your 2020 Holden Astra-Gas struts

2020 Holden Astra gas-struts

Based on technical sources, gas-struts are indeed used on the 2020 Holden Astra hatch for the tailgate, while the bonnet uses a manual prop rod. This is supported by the Holden/Opel Astra K (BK) owner’s manuals from the MY18–MY20 period, which depict a prop-rod bonnet and a tailgate supported by gas-filled struts, General Motors Global Service Information that includes a “Liftgate Support Strut Replacement” procedure for the Astra K, and major parts catalogues from brands like Stabilus and Monroe that list tailgate gas-struts for the 2016–2020 Astra 5‑door hatch.

On the 2020 Holden Astra, gas-struts do the heavy lifting for the tailgate. They’re there to hold the hatch safely open, help it rise smoothly, and keep the close-down feel nice and controlled. When they’re healthy, the tailgate pops up with minimal effort and stays put, even on a windy day.

Like any pressurised component, gas-struts wear over time. Temperature swings, dust, and normal use slowly reduce their internal gas pressure and the effectiveness of their seals. That’s why an Astra’s tailgate might start opening sluggishly in winter or need a hand to stay up. When the struts are tired, replacing them as a pair keeps lift and balance even on both sides.

Handy signs it’s time to replace:

• The hatch won’t stay up or sags halfway.
• It opens slowly or needs help, especially when it’s cold.
• Oil misting on the strut shaft or body.
• Clicks or binding at the ball-joints.

Good servicing habits for Astra gas-struts:

• Inspect at every service or annually, look for leaks and check hold-open strength.
• Keep the shiny shafts clean and dry—don’t paint or grease the shaft.
• If needed, put a tiny dab of silicone-safe lubricant on the ball sockets only, not on the shaft.
• When replacing, always support the tailgate safely (a second person or a prop), and swap both sides.

Most Astra tailgate struts use a spring-clip over a ball-stud. With the hatch supported, flick the clip back, pull the old strut off, click the new one on, and ensure the clip is fully seated. Fit them with the shaft pointing down so the internal oil keeps the seal lubricated. Avoid trying to “re-gas” sealed units—fresh replacements are the reliable fix and usually quick to fit. Done right, quality struts typically last many years of everyday Aussie and Kiwi use.

• Does the 2020 Holden Astra bonnet have gas-struts?
  Not from factory. The bonnet uses a manual prop rod. The tailgate is the part that runs gas-struts. There are aftermarket bonnet-strut kits around, but they’re not OEM for this model year.
• How long do Astra tailgate gas-struts last?
  Often 5–10 years, depending on climate and use. Coastal air, dust, or frequent opening can shorten lifespan. If the hatch sags or slows down in the cold, it’s time for new ones—replace in pairs.
• Can the original struts be re-gassed?
  Most factory-style units are sealed, practical servicing is to replace them. Some specialists offer re-gassing, but cost, downtime, and results vary. New quality struts are typically the better bet.