Parts for your 2012 Toyota Bb-Gas struts

2012 Toyota bB gas struts — what they do and when to replace them

Yes, gas struts are relevant on the 2012 Toyota bB. Technical sources such as the Toyota Electronic Parts Catalogue (EPC) and the Toyota bB QNC2# Repair Manual (Body – Back Door) list a “Stay, Back Door” that’s a gas‑charged lift support. Reputable aftermarket catalogues (e.g., Stabilus and Monroe lift supports) also supply tailgate gas springs specifically for the QNC20/21 series. The bonnet on most bB models uses a manual prop rod, but the rear hatch is held up by gas struts.

On a 2012 Toyota bB, the gas struts do the heavy lifting on the hatch, taking the weight as it opens and holding it safely overhead. That means less shoulder work, less slam, and a whole lot more convenience at the shops or the beach. Over time, the pressurised gas bleeds off and seals age, especially with heat and dust, so performance slowly drops off.

Signs it’s time to sort the struts:

• The hatch won’t stay up or sags in cold weather.
• It opens sluggishly or needs a helping hand.
• There’s an oily film around the rod or joints, or it squeaks.

Replacement is straightforward and best done in pairs to keep lift and balance even. Always support the hatch securely with a prop or a mate before unclipping the old struts. Swap one side at a time, clip or bolt the new units on, then check smooth operation. Ball-stud retainers should click home firmly, any hardware re-used should be inspected for wear. Tighten fasteners to the manufacturer’s spec and give the hinges a dab of suitable grease, not the strut shafts.

For ongoing care, keep the chrome rods clean and dry, don’t spray silicone or oil on them as it attracts grit and can damage the seals. Heat and cold affect gas pressure, so a hatch that misbehaves in winter but seems fine in summer is a classic clue they’re on the way out. As part of routine servicing, a quick lift-test and visual check will catch weak struts before the hatch droops on a windy day. Choose bB-specific replacements matched for length, end fittings and force to avoid overloading the hinges or cracking trims.

Popular questions about 2012 Toyota bB gas struts

Do all 2012 Toyota bB models have gas struts on the tailgate?
Yes. Factory documentation (Toyota EPC and the QNC2# Repair Manual, Body – Back Door) specifies gas‑charged “Stay, Back Door” units for the rear hatch across the range. The bonnet typically uses a prop rod, so owners shouldn’t expect gas struts under the bonnet unless an aftermarket kit has been fitted.

How long do the tailgate gas struts usually last?
Service life varies with climate and use, but five to ten years is common. By this age, many originals feel lazy in cold weather or won’t hold fully open. If one side weakens, replace both to keep the hatch lifting evenly and to avoid twisting the hinges or stressing the glass.

Can universal gas struts be used on a bB?
It’s best to use bB‑specific units matched for length, stroke, end fittings and force rating. Universal struts that aren’t spot‑on can cause a hatch that pops too hard, doesn’t lift high enough, or won’t stay up. Correct spec keeps the hatch smooth, safe and easy to use.