Anywho.
I opted to proceed with the procedure by removing the passenger headlight as I was removing the bumper because 1. I can and 2. I was finally putting yellow film on my fog lights. Makes perfect sense.
Even though the new alarm comes with a shiny new house, I kept the old one so I didn't have to grind on a safety bolt and fender liner rivets.
The alarm itself is held in by two, 10mm lock nuts (and a connector if you want to get technical). The top nut is easy enough to use your spanner and a ratcheting spanner makes even easier work of it. Yes, a closed spanner will be trapped but then you can use it to pull the module free once the bottom nut is loose too. Leverage!
To remove the hidden lower lock nut, I used a socket on a wee little ratcheting bit driver. It's still a tight fit but the fender liner is plastic and very forgiving if you poke it out to make room.
Once the nuts were free, the alarm can be wiggled out and the connector exposed and removed. The nuts do not need to be completely removed, just clear of the housing but my old part was being stubborn.
I didn't even have to break anything.
Don't forget to reconnect the alarm connector plug before your slide that bad boy home and button everything back up.
Using new hardware when the old hardware is perfectly good is what luxury is all about.
