These alarms have an internal battery which eventually runs down, but they're sealed units.
I replaced the S4 one with an A8 unit and it works a treat - you can get them from A8parts of course 
__________________
Present: S4 B8 avant, fully loaded, MRC Stage2, Milltek non-res, KW springs
Past: S8 D2 FL, S2 ABY coupe, RS6 C5 saloon, RS4 B7 saloon, S4 B5 saloon, S4 B6 avant, all gone but not forgotten
|