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Discussion Starter · #1 ·
I changed the battery in my 2018 Optima EX smart key with a brand new battery and now it doesn't work. Any suggestions? My dealership is 2 hours away from me.
Thanks in advance
 

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Discussion Starter · #4 ·
Hopefully this will work and it should. I talked to the dealership service dept today and he recommended I flip the battery. I went to the owners manual and lo and behold my smart key shows negative as being up. I should have paid better attention when I took it apart.

Hope everyone has a good day.
 
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