How Digital Immobilizers Work
Professional-grade digital immobilizers connect to your vehicle's CAN bus—the internal network that controls everything from the engine to the door locks. They intercept engine start commands and add a second authentication requirement.
When you press the start button, here's what happens:
- Your key fob signal is detected (factory step)
- The car's computer authorizes the start (factory step)
- The immobilizer checks for your PIN sequence (added step)
- If correct → engine starts. If not → nothing happens.
The critical difference: this authentication happens at the CAN bus level, not the key fob level. Relay attacks, cloned keys, and OBD programming tools cannot bypass it.
PIN Entry Method
Your PIN is entered using existing factory buttons—steering wheel controls, turn signals, or window switches. No visible keypad.
Invisible Installation
No LEDs, no keypads, no visible wiring. Thieves scanning for security systems find nothing to indicate protection.
No Radio Signals
Unlike key fobs, immobilizers don't broadcast anything. There's no signal to relay, amplify, or intercept.
OBD-Proof
Even with full OBD port access, thieves cannot disable the immobilizer or bypass authentication.
What Threats It Stops
| Theft Method | Factory Security | Digital Immobilizer |
|---|---|---|
| Relay Attacks | ❌ Vulnerable | ✓ Protected |
| CAN Bus Injection | ❌ Vulnerable | ✓ Protected |
| Key Cloning | ❌ Vulnerable | ✓ Protected |
| OBD Port Programming | ❌ Vulnerable | ✓ Protected |
| Tow-and-Go (flatbed) | — No protection | — Requires wheel locks |
Professional Systems Available
Several manufacturers offer professional-grade digital immobilizers. While the core technology is similar, there are differences in features, installation complexity, and compatibility.
IGLA (Autotor Alarm)
CAN bus immobilizer with PIN entry via factory buttons. Popular in UK and US. Known for hidden installation and no subscription fees.
Typical installed cost: $1,200–$1,800
Ghost (Autowatch)
Similar CAN bus technology with button-based PIN. UK origin, expanding globally. Offers app connectivity on some models.
Typical installed cost: $1,000–$1,500
Pandora (Russia-based)
Comprehensive systems with immobilizer, GPS, and remote features. More complex installation. Popular in Europe.
Typical installed cost: $1,500–$2,500+
Note: All professional immobilizers require proper installation by trained technicians. DIY installation is not recommended and may void effectiveness.
Ready to Explore Protection?
Check if professional immobilizer installation is available in your area. Authorized installers can assess your vehicle and recommend the right solution.