Parts for your 2011 Toyota Bb-Gas struts

2011 Toyota bB gas struts — what they do and when to replace them

Technical references confirm gas struts are used on the 2011 Toyota bB. Toyota’s Electronic Parts Catalog (for QNC20/QNC21/QNC25) lists a Back Door Stay Sub-Assembly on both sides (Toyota group numbers 68950/68960), and the factory repair manual includes removal and installation steps for the back door stays. The bonnet on this model is supported by a prop rod rather than gas struts, so the relevant gas struts are for the rear tailgate.

On the 2011 Toyota bB, the rear gas struts quietly do the heavy lifting every time the tailgate’s opened. They’re nitrogen-charged dampers that counterbalance the weight of the door, making it easy to lift and preventing it from crashing down. When healthy, they hold the hatch steady, even in a breeze, when tired, they turn a simple grocery unload into a risky juggling act.

These struts don’t have a set service interval, but most need replacement somewhere in the 5–10 year window, sooner in colder climates or if the car lives outdoors. The best practice is to replace them as a pair so the opening force and hold height match on both sides. It’s a straightforward job with basic tools: support the tailgate safely (a prop or a helper), flick off the retaining clips at the ball ends, swap in the new units, and make sure the clips are fully seated. Avoid clamping the shaft with pliers and don’t open the canister—gas struts are pressurised.

Day-to-day care is simple. Keep the chrome shafts clean and free of grit, a quick wipe with a soft cloth helps. Don’t grease the shafts—oils and silicone sprays can swell the internal seals and shorten the strut’s life. If the car’s parked for long periods, closing the tailgate reduces constant load on the struts.

Common signs it’s time to fit new struts include:

• Tailgate drops or won’t stay up, especially in cold weather
• Jerky opening or a weak lift that needs an extra shove
• Oily film on the shaft or hissing as gas escapes

When choosing replacements, match the original length, end fittings (usually ball-socket types), and force rating. Quality aftermarket or genuine units both do the job, what matters is correct spec, proper installation, and safe handling. With fresh gas struts, the bB’s tailgate goes back to feeling light, predictable and hassle-free.

Popular questions about 2011 Toyota bB gas struts

Do all 2011 bB models have tailgate gas struts?
Yes. The Toyota EPC lists back door gas struts across the QNC20/QNC21/QNC25 range for this model year. The bonnet uses a support rod, but the rear hatch relies on a pair of gas-charged stays to open smoothly and hold position.

Can just one strut be replaced?
It’s technically possible, but not ideal. Mixing an old weak strut with a new strong one can twist the tailgate and reduce hold height. Replacing in pairs gives balanced lift, better longevity, and a more OEM feel.

How long do the bB’s gas struts usually last?
Typically 5–10 years, depending on climate, usage, and exposure. Frequent hot–cold cycles and dust can age the seals faster. If the hatch won’t stay up or feels heavy, it’s time to swap them out.