Efficient Gas Spring - Uses a gas spring hydraulic rod for smooth, reliable opening and closing of the car boot. Compatibility - For BMW 3 Series E90, model years 2006–2011 - Rear trunk tailgate gas spring shock lift strut - Part number: 51247060623 - Also described as rear struts, support bar, rod Key benefits - Safe, controlled opening: slows the tailgate descent to prevent sudden drops and reduce effort when lifting or lowering the boot - Improves daily usability: makes loading and unloading groceries, luggage, or equipment easier and more convenient - Replacement quality: restores smooth operation if original tailgate struts are worn or failing Function - This tailgate auxiliary column kit regulates the tailgate’s descending speed, enabling a slow and safe opening every time Use scenarios - Replacing worn-out tailgate struts on a BMW E90 to restore original performance - Everyday loading and unloading of items such as groceries or luggage with a controlled, safer opening - One-handed operation while carrying items, thanks to the controlled descent and easier lift Notes - Keeps the original function and specifications aligned with the BMW E90 rear trunk tailgate requirement - No added components beyond the stated model compatibility and part number