12-09-2025 04:24 AM
Is there any way to find the manufacture or expiration date of a Nest Protect before opening the box? I have the serial number on the outside packaging, but the “Replace By” date is only printed on the back of the detector. Does Google offer a lookup tool for serial numbers, or is opening the box the only way to see the expiration?
Hate to buy it, and it expires in a year or so?
12-12-2025 04:17 PM
Hi @godawgs,
Thank you very much for contacting this community! I understand you are trying to find the manufacturing or expiration date of the Nest Protect before opening the box. I know how frustrating it is not knowing when a device is about to expire, but I am here to help you.
I would like to ask you a few questions so I can provide you with more information.
Please feel free to share any additional details you think might be relevant.
Best regards,
Eduardo
12-22-2025 03:56 PM
Are you just randomly asking for users to do things? Seriously what would sharing a photo of the box without serial number do?
Did you read the user's question and use context clues? Why assume they've purchased a detector already? Basic comprehension shows that they're asking if there's a way to know how many years they might get from an old stock device.
01-02-2026 05:07 AM
Here are the image
Why do you need to hide the serial numbers?
01-02-2026 05:23 AM
You got your pictures. Now please "provide [us] with more information." What is the expiration date of that exact unit?
01-02-2026 05:45 AM
Come on? If I knew the expiration date I would not have posted in this group asking my question.
Guess you did not read the my question that started this conversation
01-02-2026 06:37 AM
I'm on your side. I'm responding to the "specialist" that is asking you to do random things that will actually never get you anywhere closer to an answer. They'll ask you to do random pointless stuff then never answer you when you respond. I'm calling them out on it.
01-02-2026 07:13 AM
My bad. I thought it was @EduardoN replying.
will read it closer next time.
01-02-2026 07:31 AM
Nah all good. I totally get the frustration with these Nest products. And the "specialists" here. 😅
It's worse than the auto part store ppl asking you what color your car is before they can lookup what size wiper blade you need.
01-13-2026 04:49 AM - edited 01-13-2026 05:08 AM
Sadly you need the serial number to give a year, and you have blanked that bit out.
Give me the 3rd and 4th numbers after AC and I will give you an idea of year if I can. What this means is, the 3rd and 4th numbers are the build date, so add 10 onto that number. That is the expiry YEAR - NOT year and month, just year.
Many thanks to the Mod who clearly has no idea of the product yet again.
01-13-2026 05:51 AM
AC4718, so I am guessing 2018 with an expiration of 2028
01-13-2026 06:07 AM - edited 01-13-2026 06:11 AM
Yes looks about right.
The box is the old one also if that helps, they changed to a newer design box some years ago.
That is in a shop for sale???
The newer box style.
12-20-2025 03:51 PM
Realistically, at this point it makes little sense to buy any new protects, even if you already have some. Production has ended, potentially even a couple years ago (when it was common to be getting "old" stock) Google has ended production before getting the protects into Google Home. (Beta doesn't count for life safety products.)
If you have an expiring or failing unit among other protect detectors, it would be safer to buy a non smart co/smoke detector than another Nest Protect.
I would also skip the First Alert model that Google sold the design to. Google has failed spectacularly in Nest software development and migration, that it's hard to trust them.