I am rebulding my sport passenger seat and one of my backrest adjustment shock was rated at 600N instead of the 350N. The vertical shocks are 500N. This once can easily be used in place of the 500N. I am getting the correct one now. I believe this was done at the factory as my passenger seat does not look to have ever been touch. All the shock clips are original and that part is NLA(the one without cover). Not sure why BMW did this. I will eventually do the driver side. The shock still works and I made a divet in my tile grout when trying to compress it.
Yours for $12 shipped.
Here is pic:
Yours for $12 shipped.
Here is pic:


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