The Recall Desk
CriticalFDA (Devices)·Z-2448-2025·Announced 2025-09-10

Dexcom G7 watchOS app recalled because sensor failure alerts are missing

The Dexcom G7 CGM watchOS App, versions 2.8.0 and earlier, is recalled because it does not give the expected Sensor Failed alert and silently ends the session. 907,842 units are affected.

What this means for you

Highest-severity recall. Risk of serious injury or death is documented or strongly suspected. Stop using the product now and follow the agency's instructions.

Our severity reasoning: The rubric assigns 5 to any FDA Class I recall, and the FDA classified this continuous glucose monitoring app action as Class I.

Plain-English summary

The Dexcom G7 CGM watchOS App, model SW13355, software versions 2.8.0 and earlier, UDI 00386270005168, is being recalled. The action covers Dexcom G7 Continuous Glucose Monitoring Systems using iOS, watchOS and Android app software versions 2.8.0 or earlier and Dexcom ONE+ CGM Systems using iOS and Android app software versions 1.4.0 or earlier. The recall covers 907,842 units distributed in the United States and many other countries.

The affected app does not provide an expected "Sensor Failed" alert when the transmitter sends a "transmitterFailed" error message after the CGM experiences a hardware or firmware failure. Instead the app ends the sensor session, stops reporting glucose values and displays the Start Sensor screen or a No active sensor message without alerting the user. The manufacturer states this can lead to missed detection of a hyperglycemic or hypoglycemic event and a delay in treatment. The FDA classified the action as Class I.

Users should update the app as directed by the manufacturer and check regularly that a sensor session is active, following their clinician's guidance on backup glucose testing.

The recalled product

Product
Brand Name: Dexcom G7 Continuous Glucose Monitoring System Product Name: Dexcom G7 CGM watchOS App Model/Catalog Number: SW13355 Software Version: versions 2.8.0 and earlier Product Description: Dexcom G7 CGM watchOS App - The watchOS app is installed along with the iOS phone
Manufacturer
Dexcom, Inc.
Category
Medical Device — Glucose Monitoring
Hazard
  • missing-alert
  • software-defect
  • glucose-monitoring
  • class-i

Is your product affected?

Check your packaging against the codes below. If any of them match, the product is part of this recall.

Lot numbers (1)

  • Lot Code: UDI - SW1355- 00386270005168

Distribution

Distributed nationwide across the United States.

Related recalls

Same category