The Cobra AK4138 is quite simply in a league of its own when it comes to the world of high-end remote alarm/immobilisers.
It is designed for older vehicles that do not have a factory transponder immobiliser and keyless entry.
Cobra AK4138 Modular Alarm System
The system is completely modular which means that the Siren, Alarm ECU, and immobiliser are all separate. They communicate with each other via a secure bus network.
There are a number of advantages in having separate modules. The first is 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, these click when the alarm is triggered.
The bus network monitoring means that if the siren is unplugged, or the cable to the siren gets cut, not only will the siren sound, but the alarm will also be set off.
If any items have been disconnected whilst the system is disarmed the alarm will report a fault. This way if you have a dodgy mechanic or some unscrupulous bastard tampers with the alarm you’ll know about it. The alarm will chirp to warn you that something is not right, then the LED will flash a fault code.
The main alarm ECU immobilises the starter motor, and the modular immobiliser cuts two running circuits. If that is not enough an additional 8509 immobiliser module can be added for an additional two cuts.
The Cobra immobiliser is the only system in NZ that is totally attack-proof.
Digital Battery Back-up Siren
The 4310 Digital siren is simply in a league of its own as it is fully waterproof. It’s rugged too and the battery pack lasts for years. It makes most other sirens on the market look compromised.
If that is not enough then the AK4138 has a dedicated horn honk output, or a second 4310 siren can be added to the bus network which can be used as an internal screamer, or as a second external siren.
If you want to hear one in action then I have one installed on Obsessive Wagon.
Rugged remote control
The Remote controls are waterproof and Muppet proof with two simple buttons that do what they should.
The lock button will arm the alarm, and also has the option to activate the optional window closure. A second press will disable the ultrasonic sensors 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 activate 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.
Ultrasonic Movement Sensors
Ultrasonic Sensors come as standard. These are far more effective than the glass break sensors found on most other alarms.
They look the part too and can be painted to match the trim of your car if need be. I find that the grey colour matches about 90% of cars, but for those that are not grey, I normally have some pods which I have pre-sprayed black just in case.
Insurance Approved: Thatcham Cat 1
Obsessive Rating: 10/10
Looking at some of the alarms that claim to have a 5-star rating to it would only be right to give the AK4138 a 10 Star rating. It simply is that much better than the competition!
- Digital Battery Back-up Siren
- Dash Mount LED Over-ride
- Two 2 Button Remotes
- PIN code protected remote coding
- Three Immobiliser Cuts
- Door Open Warning Tones
- Car Finder Via Remote
- Panic Via Remote
- Diagnostic Fault Codes
- BUS line for optional accessories
- Controlled Window Closure
- Drivers Card Or ADR Card (anti key theft)
- Additional Immobiliser via a secure BUS line
- 2nd Siren for internal protection
- Extra LED as a visual deterrent
- Pager Output
- Level Sensor
- Microwave Sensor
- PIR sensor
- Reed Switch
Siren power: > 115 dB (A)
Max. consumption: < 19 mA
Common Question: Is the AK4138 is still the best remote alarm/immobiliser available due to it being a number of years old now.
The answer is a yes.
Why is it still the best after all these years?
Well its made for older vehicles that do not come with a factory transponder immobilizer or existing keyless entry, therefore it does not need software updates or the ability to tap into the vehicles CAN-BUS. If you have a modern car with these features then take a look at the AK4615.
It’s simply the best option if you have a high-risk vehicle that lacks modern security features.