I have a 1996 2 Ltr 16v MK1 406 and the original Peugeot Texton alarm (Model number 96182344.

no longer makes a noise when the alarm is activated.The head lights flash,but the sounder only makes a quiet ticking sound . I tested the internal battery in the sounder unit which turned out to be dead. I have applied 12v directly to the sounder unit terminals and still get the same quiet ticking sound. So I purchased a new sounder unit from my Peugeot dealer and fitted it , but this makes no sound at all when the alarm is activated. Peugeot told me that the new unit should work in my 406 ,but the original unit is light grey,bigger, and has a key switch and a different model number (96266287.

, where as the new unit is black and does not have a key switch. Have Peugeot given me the wrong part or is the cars alarm control unit faulty.
Has anyone got a working alarm sounder unit with key, that would fit my car please.
MK1 1996 2Ltr 16v Petrol LX, 167,000 miles,was aiming for 200,000.