Parts for your 2012 Mazda Premacy-Gas struts

2012 Mazda Premacy gas struts — fitment, purpose and servicing tips

Gas struts are absolutely relevant on the 2012 Mazda Premacy (Mazda5, CR series). The rear liftgate uses a pair of gas-charged support struts. This is confirmed in Mazda Service Information for the CR chassis (Body: Liftgate/Back Door — Liftgate Stay Damper), parts catalogues that list “Back Door Stay/Stay Damper” for the 2010–2013 Premacy/Mazda5, and aftermarket technical catalogues from Stabilus (LIFT-O-MAT) and Monroe/Max-Lift that specify two lift supports for the tailgate on this model. The bonnet on this vehicle uses a manual prop rod rather than gas struts, per owner’s and workshop literature.

On the Premacy, the rear gas struts quietly do the heavy lifting. Charged with nitrogen and a dab of oil for damping, they counterbalance the tailgate’s weight so it opens smoothly, holds its height, and doesn’t crash down on a windy day. When they’re healthy, the hatch glides up with one hand and stays put, when they’re tired, it sags, needs a shove, or drops unexpectedly — not ideal when loading the weekly shop.

As part of routine servicing, it’s worth giving these struts a quick once-over. Wipe the chrome shafts with a clean, dry cloth, check the end fittings for play, and listen for hissy or squeaky noises. Don’t grease or paint the shafts, contaminants can damage the internal seals. If there’s oil weeping around the shaft or the hatch won’t hold itself up, that’s the cue they’re on the way out.

Replacement is straightforward and best done in pairs to keep lift and balance even. Support the tailgate safely (a helper or a prop is a must), pop the retaining clips at each ball joint, and swap the units one by one. Most quality replacements clip straight on, give the joints a light check for security and make sure the hatch opens and holds at full travel. If the car has had panel work or a tailgate accessory fitted (bike rack, spoiler), choose a strut rating that matches the added weight as per supplier guidance.

Owners can expect service life to vary with climate and use, but many see 5–10 years before noticeable fade. Hot summers, salty air, and frequent heavy tailgate use will shorten that. Keeping the shafts clean and avoiding leaning on the open hatch helps eke out a bit more life. If unsure about part numbers or force ratings, the Mazda EPC listing for the CR Premacy/Mazda5 “Back Door Stay” or a reputable gas-spring catalogue will point to the correct left/right pair.

• Typical symptoms: hatch drops or won’t stay up, opens sluggishly, needs two hands, visible oil mist on shafts.
• Service tips: keep shafts clean, don’t lubricate, replace in pairs, support the hatch during replacement.

FAQ

How long do the rear gas struts usually last on a 2012 Mazda Premacy?
In typical Aussie and Kiwi conditions, many last around 5–10 years. Heat, coastal air, and how often the tailgate is used all play a part. If the hatch starts dropping or won’t hold full height, they’re due.

Can just one tailgate strut be replaced?
It’s possible, but not recommended. Replacing in pairs keeps lift even, prevents twisting of the tailgate, and gives a consistent feel. Mixing an old soft strut with a new one can make the hatch behave oddly.

Are the bonnet/hood supports on the Premacy gas struts as well?
No. The 2012 Premacy uses a manual prop rod for the bonnet, as shown in factory literature. Only the rear liftgate is supported by gas-charged struts on this model.