Order doesn't matter but the sequence very much does.

Start with whichever key was the last working key.

The main cause of failure is a key button not working.

You can test if the buttons are working at a store that sells key fob batteries and has a signal tester.

Confirm the lock and unlock buttons can light up the tester. If any button didn't work you can't sync.

It often takes a couple attempts be persistent.


–awr–

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