Pairing apple air pods . I lost the right one and when I try to replace it, it won't pair with the left one

Re: "Pairing apple air pods .

I lost the right one and when I try to replace it, it won't pair with the left one"

See if following the steps in this Apple Support article can help you set them up, and pair them :

Set up your replacement AirPods or charging case - Apple Support

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Re: I have a 2nd generation air pods, lost the right one and ordered a left one but it won't pair.

Is the lest one a A2031 and the left one A2032?

See how to: Identify your AirPods - Apple Support