Glyn001

The car alarm sounds whenever the doors are locked. A professional garage has identified via the OBD2 that the alarm control unit battery is low. Could someone please advise me: Where is the alarm control unit located on the car so that I remove it? Can a new battery be put into the alarm control unit or does it require a replacement unit? If I buy a used alarm control unit, will the ECU (or whatever) recognise and communicate with the used part, or can I get it programmed/coded, or do I need to buy a new unit? Any help would be very much appreciated. Thanks.

Hello, I'm Glyn; I'm new here, and I am in Bromsgrove, Worcestershire, UK. I am on my 4th Chrysler 300C saloon. I've had a 2007, 2008, 2012 (2nd Generation), and I have owned a 2014 300C since 2018. I had the 2012 and the 2014 car remapped to give more power and improved fuel economy. Superb cars, super smooth, comfortable, and great styling. Hope you're all friendly :-)