Both my keys needed solder reflowed. I replaced one battery mostly just because I ordered in case I needed.

I lost my main key on a road trip been using my backup key since and the remote no longer works.

I have a new diamond key ordered and a valet key as well so I can hide a key.

Once I have my new keys I will take apart my current key and reflow the solder joints and should have a backup remote key.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)