Dexcom recalls G7 CGM watchOS app versions 2.8.0 and earlier for missing sensor failure alerts, which could delay treatment of high or low blood sugar events.
The affected devices are the Dexcom G7 Continuous Glucose Monitoring System (CGM System) using iOS, watchOS and Android App software (versions 2.8.0 or earlier) and Dexcom ONE+ CGM System using iOS and Android App software (versions 1.4.0 or earlier), henceforth referred to as the App . The affected App does not provide an expected "Sensor Failed" alert when the transmitter sends a "transmitterFailed" error message to the App when the CGM experiences a hardware or firmware failure. Instead, the App ends the CGM sensor session, stops reporting glucose values and displays the Start Sensor screen or No active sensor message without alerting the user, which can lead to missed detection of a hyperglycemic or hypoglycemic event and a delay in treatment.
Dexcom is recalling older versions of its G7 CGM watchOS app that don't alert users when the glucose sensor fails. This could cause missed detection of dangerous high or low blood sugar events, risking serious health consequences.
The older app versions don't show a 'Sensor Failed' alert when the glucose sensor stops working. Instead, the app ends the sensor session and shows a 'Start Sensor' screen without warning, which can delay treatment of dangerous high or low blood sugar events.
People using Dexcom G7 CGM systems with older watchOS app versions (2.8.0 or earlier) are affected. Those with diabetes who rely on continuous glucose monitoring are most at risk.
Check if your Dexcom G7 CGM watchOS app is version 2.8.0 or earlier. The affected app is installed with the iOS phone app and cannot be used alone.
Update the Dexcom G7 CGM watchOS app to version 2.8.1 or later to get sensor failure alerts.
No, the recall does not require returning the device. Updating the app resolves the issue.
The app may stop reporting glucose values without warning, which could delay treatment of high or low blood sugar events.
No, this is a software issue with the watchOS app versions 2.8.0 and earlier.
We’ve drafted a message you can send Dexcom to request your refund or repair — edit it as you like.
Subject: Recall Z-2448-2025 — Dexcom Dexcom Hello, I own a Dexcom that is covered by recall Z-2448-2025 from Dexcom. I’m writing to arrange the remedy described in the recall (a refund, repair, or replacement as applicable). Could you please tell me the next steps to resolve this? Thank you.
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The facts (hazard, remedy, dates, manufacturer) are pulled from the official FDA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
