Auto Boot Struts

Tired of a heavy, sagging rear hatch that constantly threatens to slam down? Or looking to upgrade your vehicle with an automatic pop-up setup? GASTAC’s premium auto boot struts are engineered to restore effortless, brand-new opening lifting force to your trunk or rear tailgate assembly.

As a trusted automotive gas spring manufacturer, GASTAC design lift supports that perform flawlessly under extreme temperature variances, ensuring your boot opens smoothly and stays locked securely in place when you need it most.

What Are Auto Boot Gas Struts?

Auto boot struts (also called boot gas struts, tailgate struts, or trunk lift supports) are gas-charged cylinders designed to hold your vehicle’s rear hatch or boot lid open safely.

They are designed to:

• Support the full weight of the boot lid or tailgate
• Provide smooth opening and closing motion
• Keep the boot securely open during loading
• Prevent sudden or unexpected closure

When internal gas pressure decreases over time, lifting performance becomes weak and unstable.

Common Signs of Worn Auto Boot Shock

When the gas springs on your vehicle begin to lose their pressurized nitrogen charge or internal hydraulic fluid, they will display a few unmistakable warning signs. Catching these symptoms early prevents the rear hatch from dropping unexpectedly on your head or hands. Here are the 5 common signs that your auto boot gas struts are worn out and need to be replaced:

• The Hatch Sags or Creeps Down: You push the tailgate all the way open, but it slowly drifts down by itself instead of staying locked in place.
• Total Failure in Cold Weather: The trunk works fine on warm days but completely collapses on freezing winter mornings because cold temperatures drop the internal gas pressure.
• Oily Residue on the Piston Rod: A wet oil film or greasy grime buildup on the silver rod means the internal hydraulic seal has broken and the pressurized gas is leaking out.
• The Trunk Feels Extremely Heavy: Opening the boot feels like a workout. You are lifting the full weight of the steel and glass with your own muscles because the struts provide zero lifting assistance.
• Harsh Metallic Shaking or Noises: The hatch squeaks, hisses, or shakes unsteadily when opening, lacking that smooth, controlled cushioning at the very top.

Quick Tip: Always replace auto boot struts in pairs. If one side is dead, the other is under double the stress and will fail shortly after.
 

GASTAC Auto Boot Struts Designed for Multiple Vehicle Applications

The absolute biggest headache when ordering car parts online is fitment anxiety: “Will this actually fit my specific car?” GASTAC solves this by engineering 1:1 OE (Original Equipment) specification struts. We map the exact length, stroke, and Newton force for over 99% of vehicles on European roads:

• The Daily Drivers: Tailored for hatchbacks and saloons like the Ford Focus, Volkswagen Golf, Vauxhall Corsa, and Toyota Yaris.
• The Family Haulers: Extra lifting power designed for heavy tailgates on popular SUVs like the Nissan Qashqai, Land Rover, and Kia Sportage.
• The Premium Estates: Sophisticated, smooth dampening built for the Audi A4 Avant, Mercedes-Benz C-Class Estate, and BMW 3-Series.

Auto Boot Struts OEM Specification Sheet

OEM	Photo	Rod / Tube Ø	Stroke	Extended Length	Force	Year
8K9827552A		8 / 18 mm	185 mm	500 mm	450N	AUDI A4 2007 – 2016
51785412		8 / 18 mm	160 mm	455 mm	350N	FIAT 500 2007 – …
9639853880		8 / 18 mm	160 mm	445 mm	420N	CITROËN C3 2002 – 2010
1U6827550B		8 / 18 mm	195 mm	495 mm	515N	SKODA OCTAVIA 1996 – 2010
5G6827550C		8 / 18 mm	180 mm	530 mm	520N	VW GOLF 2012 – …

Looking for other models? If you need OEM gas springs for other vehicle models, please visit the GASTAC Online Store to browse our complete catalog and purchase directly.
 

How to Replace Auto Boot Struts?

Replacing your worn-out auto boot struts is a quick, straightforward project that requires no special tools.

• 1.Secure the Tailgate: Fully raise your rear hatch. Because the old struts are weak and tailgates are exceptionally heavy, use a sturdy prop rod or have a friend hold it open securely to prevent injury.
• 2.Release the Retaining Clips: Locate the small metal band retaining clips on the back of the ball-joint end sockets. Insert a small flat-head screwdriver under the clip and pry it slightly outward to release the joint tension.
• 3.Pop Off the Old Boot Shock: Gently pull the old boot strut socket away from the vehicle’s metal ball studs. Wipe away any gritty grease or road grime from the original mounting pins.
• 4.Snap the New Boot Strut On: Orient the new GASTAC boot strut with the thick cylinder body pointing upward (connected to the hatch hinge) and the thin metal rod pointing downward (connected to the vehicle body). Align the socket and push firmly onto the ball stud until it snaps securely home!

Why GASTAC is the Smart Choice for Global Buyers?

When sourcing auto boot struts, you need a reliable factory partner that combines premium material engineering with agile, customer-focused manufacturing services.

• Certified Automotive Excellence: All GASTAC gas springs are manufactured under strict IATF 16949 and ISO 9001 quality management systems to meet strict vehicle-grade tolerances.
• 100,000-Cycle Durability: Tested in professional engineering labs, our struts withstand over 100,000 continuous extension and compression cycles without losing nitrogen gas pressure.
• Flexible Small-Batch Orders: No massive inventory commitments required. We support low MOQ / small-batch orders, making it highly cost-effective for e-commerce platforms and regional auto parts shops.
• Custom Engineering & Force Tuning: Need a specific Newton force (F1 rating) to handle an added rear spoiler, or looking for custom end-fittings and lengths? Our in-house engineering team provides rapid tailoring solutions.
• All-Weather Performance: Built with premium multi-lobe rubber seals and micro-polished piston rods (Ra≤0.15 μm), our struts prevent gas leakage even during freezing winter temperatures.
• Rapid Manufacturing Lead Times: Our automated production lines guarantee large-volume capacity, super-fast turnaround times, and reliable global logistics.