Proper Diagnosis of BMW Z4 Trunk Strut Problems
A trunk strut makes it possible for you to safely close and open your vehicle's trunk. Without it, there is nothing to support the frame of your trunk lid. Once your trunk strut fails, it will be a very hard to access the trunk, let alone open its lid. In fact, it might be close to impossible to load the trunk without using one hand to keep the lid open. Your BMW Z4 trunk strut has superior strength and durability, but it can sometimes fail due to negligence, frequent abuse, or old age. Here are some tips on how to properly diagnose trunk strut problems, along with some simple tips on how to fix them.
This is a common problem with the BMW Z4 trunk strut. The trunk lid may come down when wind blows towards it or when even the slightest downward force is applied to the lid. In this case, the strut may not be defective-it naturally wears with age. Check if the gas inside the strut has deteriorated completely from within. This is causing the strut's structure to weaken.
Note that you don't need to replace both struts if only one strut fails. You can replace the damaged or aging strut and keep the working one until it wears out and stops functioning properly as well.
Trunk that does not close every time
If your trunk lid does not completely close every time, check the retainers that attach the bottom part of the lifter cylinder to a stud on the car body. They might be bent out of shape, causing the trunk strut itself to function poorly. This can be caused by negligent banging of the trunk lid when closing it. It can be avoided by using less force when closing the lid, but unfortunately, bent or damaged retainers can only be replaced and not repaired.
Scratched metal surfaces
Although they may not cause your trunk struts to fail, scratches on the metal rod will definitely affect the appearance of your trunk's interior. The metal rods are usually polished or painted and can be nicked when loading cargo with sharp edges. When cleaning the struts, make sure you use a microfiber cloth that will not leave any scratches on any of the strut's metal surfaces.