Meeni,
You might call Ted Porter at The Beemer Shop:
https://www.beemershop.com/
He is very helpful on all things related to suspension, doesn't matter the brand or where you got it. Leave him a message and he will call back.
You didn't give the year, model, miles, or where you are, etc, but it looks like a box stock R11S (still has the carbon canister). If there are more than 40K miles on the shocks, it's time to consider replacing the stock units. You would be amazed at the difference good units make.
Let us know what you find!!