Parts for your 2008 Mazda Cx-9-Gas struts

2008 Mazda CX-9 Gas Struts — What They Do and When to Replace Them

Technical references including the Mazda CX-9 (TB) workshop manual (Body: Liftgate) and OEM/aftermarket catalogues for the 2007–2015 CX-9 confirm that this model uses gas-charged liftgate struts (also called liftgate stays or support dampers). Even vehicles optioned with a power liftgate rely on these gas struts to balance the tailgate’s weight, the electric motor assists but does not substitute the struts. The bonnet on most 2008 CX-9s uses a prop rod rather than gas struts.

On a 2008 Mazda CX-9, the gas struts do the heavy lifting every time the tailgate is opened. They counterbalance the door’s weight, control the speed of movement, and hold the tailgate steady at full height so there’s no head knocks or unexpected drops. When they’re in good nick, the tailgate rises smoothly and stays up without fuss, even on a breezy day.

As part of routine servicing, it’s smart to give the gas struts a quick once-over. Wipe the chrome rods with a clean, lint‑free cloth (no grease or silicone spray on the rods) and check the end fittings and ball studs for play or corrosion. Weak struts can load up the power liftgate mechanism, so keeping them healthy protects other components too.

• Common signs they’re tired:
  • Tailgate doesn’t stay up, sags, or drops in cold weather
  • Slow, jerky, or uneven movement
  • Oily residue on the rod or body of the strut
  • Clicking or hissing noises and increased effort to lift

There’s no fixed replacement interval, but five to ten years is typical depending on climate and usage. Replace them in pairs to keep lift height and opening force even. Select struts with the correct force rating in newtons for the CX-9’s tailgate (variants with rear spoilers or power liftgate can require different ratings). Reputable catalogues and the Mazda parts system list these by VIN.

DIY replacement is straightforward: support the tailgate securely with a prop and a helper, then release the spring clips at each end and swap the struts one at a time. Don’t open, heat, or puncture a gas strut—these are high-pressure components. Ensure the ball studs are sound and tightened to spec. If the vehicle has a power liftgate, follow the workshop manual’s initialisation procedure after fitting new struts so the system learns the correct lift profile.

Done right, fresh struts make the CX-9’s tailgate feel brand new, reduce strain on hinges and motors, and keep everyone safer at the back of the vehicle.

Popular questions about 2008 Mazda CX-9 gas struts

Does the 2008 Mazda CX-9 have gas struts?
Yes, it uses gas-charged struts on the tailgate. The workshop manual identifies them as liftgate support dampers/stays. Models with a power liftgate still rely on these struts for counterbalance. The bonnet typically uses a prop rod, not struts.

How often should liftgate struts be replaced?
There’s no set schedule. Replace them when the tailgate won’t stay up, moves sluggishly, or shows oil weep. Many owners see 5–10 years of service life, with colder climates and frequent use shortening that window.

Can the struts be replaced at home?
Yes, if the correct parts are on hand. Support the tailgate, replace in pairs, and don’t lubricate the rods. For power liftgate CX-9s, perform the liftgate initialisation after installation as outlined in the service manual.