sub amp wiring kit amp install

[Gazza1379]

im about to install a wiring kit to power an amp and sub, just want to know when i disconnect the Battery will it do anything to the immobiliser, iv'e read the instructions and there's a warning saying it may cause the vehicle alarm or immobiliser to reset, any help appreciated thanks. it's a 2003 impreza wrx

[stants]

Possibly if its the factory fit sigma alarm, do you have the keypad code incase I goes wonky ?

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