The Cobra AK4138 is basically the AK4198 and the 8509 combined. Together the system is a full blown Thatcham Cat 1 system with plenty of cool options.
The system is completely modular which means that the Siren, Alarm ECU and immobiliser are all separate and communicate to each other via a secure bus network.
There are a number of advantages in having separate modules. The first is it that they are small and easier to install into tight areas. The second is that most alarms give away the immobiliser location by containing the indicator relays which click away when the alarm is triggered.
The Cobra immobiliser is the only system in NZ which is totally attack proof plus the siren is simply in a league of it’s own. It can be used as an internal screamer or as a second external siren. This post explains why it is so much better than the competition: http://vehiclesecurity.co.nz/blog/battery-back-up-sirens
Ultrasonics come as standard which are far more effective then the glass break sensors found on most other alarms.
Not Hardcore enough?
If you want to take the AK4138 to the next level then it can have a second 8509 Immobiliser added to it as well as a second digital battery back-up siren. Add to this the optional drivers card, and tilt sensor and there really is nothing in its class.
The Remotes are waterproof and muppet proof with two simple button that do what they should.
The lock button will arm the alarm, and also has the option to active the optional window closure. A second press will disable the ultrasonics giving the user the option of leaving a window open, and a 3rd press will disable the optional microwave or tilt sensor (perfect if you want to take the car on a ferry). Once fully armed (after 22 seconds) the lock button will active the car finder mode then a second press will act as a panic alarm.
As for the Unlock button, well it disarms the alarm and unlocks the doors! It will also disarm the immobiliser once it has auto armed.

RRP: $850.00
Insurance Approved: Thatcham Cat 1
Obsessive Rating: 10/10
Looking at some of the alarms that the NZSA give a 5 star rating to it would only be right to give the AK4138 a 10 Star rating. It simply is that much better then the competition!
OVERVIEW
Features:
Digital Battery Back-up Siren
Dash Mount LED Over-ride
Ultrasonics
Two 2 Button Remotes
Three Immobiliser Cuts
Door Open Warning Tones
Dash Mount LED Over-ride
Car Finder Via Remote
Panic Via Remote
BUS line for optional accessories
Options:
Controlled Window Closure
Drivers Card (anti key theft)
Additional Immobiliser via secure BUS line
Additional Siren for internal protection
Pager Output
Level Sensor
Microwave Sensor



