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That's just because literally everything is an optional add-on on a BMW.

So many BMWs out there on the road without the indicators package because the owner cheaped out when buying it.

I didn't even know that was an option, never seen one that had it fitted.

My understanding is that the hardware is always installed but the dealer will not fill the liquid reservoirs unless the customer specifically requests (and pays) for it.

These days it's a software unlock.

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