Who makes the anti-theft system for Acura?
Acura’s anti-theft protections are built around Honda’s Passive Anti-Theft System (PATS), an immobilizer that uses a transponder in the key to verify authorization before the engine can start. The system is developed by Honda Motor Co. for Acura, with components manufactured and integrated by Honda and its approved suppliers. As of 2025, Acura continues to rely on PATS across its lineup.
How the anti-theft system works
At its core, Acura’s anti-theft setup is an immobilizer that validates a coded signal from the key’s transponder before the engine start sequence is allowed. If the code matches, the engine control module permits starting; if not, the engine remains immobilized. Many models also offer an integrated security alarm that detects entry or tampering.
Transponder keys and immobilizer control
The key contains an RFID transponder that communicates with the immobilizer control unit in the vehicle. This exchange happens within milliseconds and uses rolling codes to prevent cloning. The immobilizer control unit then coordinates with the engine’s computer to authorize or deny engine start.
- Transponder key with RFID chip
- Immobilizer control unit (ICU)
- Engine Control Module/PCM that validates the key
- Integrated or optional alarm system in certain trims
These elements work together to deter hot-wiring and unauthorized access, representing Honda’s approach to modern vehicle security that spans Acura models.
Who develops and supplies Acura’s anti-theft components
The core security framework—the Passive Anti-Theft System—is designed and overseen by Honda’s engineering teams for compatibility with Acura’s platform. While Honda develops the strategy and integration, various electronic subassemblies and connectors are produced by approved suppliers under Honda’s specifications.
In-house engineering vs. suppliers
Honda coordinates the overall security architecture and validates Acura’s implementation. The actual components come from established electronics suppliers contracted by Honda, ensuring consistency across the brand while meeting Acura’s performance and reliability standards.
What owners should know about maintenance and trouble-shooting
If the immobilizer or start system shows a warning or prevents engine start, follow these steps before seeking service:
- Try a spare key to rule out a damaged or worn transponder
- Check the key fob battery; a weak fob can affect communication
- Look for an immobilizer warning light or a no-start indication on the dash
- Consult an authorized Acura dealer or locksmith with immobilizer programming capabilities for diagnostics and possible reprogramming
If issues persist after these steps, it's advisable to have the immobilizer, keys, and related electronics evaluated by an authorized service provider to avoid damaging components or creating lockout scenarios.
Historical context
Acura’s anti-theft system traces its lineage to Honda’s broader security architecture, notably the Passive Anti-Theft System implemented across Honda and Acura models starting in the late 1990s and evolving with advancing key technology and encryption. The goal has remained consistent: reduce theft risk while offering convenient legitimate use for owners.
Summary
In short, Acura’s anti-theft system is Honda’s Passive Anti-Theft System (PATS), developed by Honda and implemented across Acura vehicles. It relies on a transponder key and an immobilizer control unit to prevent engine start without a valid key, with security features sometimes extended by a vehicle alarm. Maintenance and troubleshooting should be handled by authorized Acura dealers or locksmiths with immobilizer programming capabilities.
How to reset anti-theft system Acura?
Ignition Position Reset: Insert the key into the ignition and turn it to the "ON" position without starting the engine. Wait for 10-15 minutes to allow the system to recognize the authorized key and reset internal security protocols.
How do I know which anti-theft device my car has?
You can find out which anti-theft device your car has by checking the owner's manual, looking for visual cues like a flashing red light on the dashboard, or inspecting the vehicle for stickers on the windows or alarm modules under the steering column. Alternatively, you can consult a dealership or your car's manufacturer website for details on its factory-installed security features.
Common ways to check for anti-theft devices
- Consult your owner's manual: This is the most reliable method, as it will detail all the factory-installed security features, such as the alarm type (passive or active) and engine immobilizer system.
- Look for visual indicators:
- Dashboard light: A flashing red LED on the dashboard is a common sign of a passive alarm system.
- Stickers: Look for stickers on the windows or doors that advertise security systems, such as alarms or recovery systems.
- Inspect under the steering column: You may find an alarm control module or other components in this area.
- Check your key fob: Some key fobs have built-in security features. If you have a keyless entry system, research its specific anti-theft functions.
- Ask a professional: A dealership or a mechanic can help identify the specific anti-theft systems in your vehicle.
- Contact the manufacturer: If you purchased the car new, the manufacturer's website or customer service can provide a complete list of anti-theft features.
What is theft deterrent system with electronic immobilizer Acura?
The Honda/Acura Immobilizer anti-theft system uses a low-power transponder mounted in the head of the ignition key. When the vehicle is started, the Key Cylinder Module converts the transpon- der signal and sends a secure, coded signal to the Engine Control Module.
Does Acura have an anti-theft system?
And I will show you guys exactly how this works so foot on the foot brake push start button. Vehicle starts now let's shift out of park.
