Brom Disabled By Efuse 0x146

"BROM disabled by efuse 0x146" indicates a permanent hardware-level lockout on MediaTek (MTK) chipsets

Conclusion

The "BROM disabled by eFuse 0x146" error is a sign of modern mobile security at work. MediaTek and device manufacturers have moved to hardware-enforced locks to prevent unauthorized flashing, jailbreaking, and counterfeit repairs. While this frustrates power users and third-party repair shops, it is not a "bug" – it is a feature.

This can sometimes force the processor to fallback into a state that allows communication. brom disabled by efuse 0x146

Check UART logs (if accessible): Look for:

Because eFuse is a physical, one-time programmable memory, you cannot re-enable BROM access once the fuse is blown. However, you do not necessarily need full BROM access. The error means the BROM refuses the standard handshake. You have three possible avenues: "BROM disabled by efuse 0x146" indicates a permanent

Option 1: Use an Auth File (Signed DA)

MediaTek provides authorized download agents (auth DA files) to OEMs. These files contain cryptographic keys that match the eFuse values. If you obtain the correct auth file for your exact device model and CPU, you can load it in SP Flash Tool and bypass the error.

❌ Do not keep spamming button combinations. You cannot force bypass a blown eFuse with volume keys. In MediaTek chipsets, BROM is the first piece

mtk printgpt

In MediaTek chipsets, BROM is the first piece of code that executes upon power-on. It typically allows for emergency firmware flashing, system recovery, and factory repairs via a USB connection.