Renault Dongle Fault Patched [patched] May 2026
The "dongle fault" primarily refers to a critical security vulnerability in Renault vehicles where thieves could use a device (dongle) connected to the OBD-II port to bypass the immobilizer and start the engine without a key.
Information on authorized bypass tools for independent mechanics.
1. Software Patch (Post-2016 Models)
For newer Renaults (Clio IV, Captur, Megane IV), the fix is a firmware update applied via the OBD2 port. This patch does not physically repair the solder joints. Instead, it: renault dongle fault patched
How it works: The SGW acts as a firewall for the car's ECUs, blocking unauthorized writing or configuration changes.
The Patch: What Renault Has Finally Released
After years of interim “fixes” (including dealer instructions to simply unplug the dongle—disabling emergency call functions), Renault’s engineering team in Guyancourt has certified a permanent software solution. The "dongle fault" primarily refers to a critical
In a significant development, Renault, the French multinational automobile manufacturer, has successfully patched a critical fault in its dongle-based system. The vulnerability, if exploited, could have allowed hackers to gain unauthorized access to vehicle systems, compromising safety and customer data.
Security considerations during patching
Good news for Renault owners: The "Dongle Fault" has been patched!