If good grease was injected then dont sweat it - if you are worried about salt etc, clean the boots with degreaser on a rag where the needle was used, and stick a dab of black silicone to it to cover it up.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)