Hotwiring a car is a method of starting a vehicle without using the key, typically by bypassing the ignition system. Along with shaved keys, this technique was commonly used in the past to steal older cars that lacked modern electronic security systems. While popularized in movies and TV shows, hotwiring is not as common as it once was due to advances in vehicle security, however it remains a threat for older vehicles.
How Hotwiring Works
In vehicles made before the mid-1990s, the ignition system is primarily mechanical and electrical. Hotwiring usually involves:
- Accessing the ignition wires behind the steering column or dashboard.
- Identifying the correct wires
- Stripping and connecting wires to send power to the ignition system.
- Touching or sparking wires together to start the engine.
Once the right wires are connected, the car can be started without a key. Don’t try this at home, stealing cars is bad, and if you want to try this on your own car you will likely damage it.
Why It Doesn’t Work on Modern Cars
Most modern vehicles (late 1990s and newer) use transponder keys that are programmed to your vehicle’s engine immobilizer, making hotwiring nearly impossible. Without the correct chipped key or programmed key fob, the engine won’t start—even if the electrical circuit is manually completed.
How Do I Know if My Car Can Be Hotwired?
If you don’t have a 20+ year old vehicle, then you’re probably fine. Even some cars as old as the late ’90s have systems to prevent this, however some vehicles (mainly heavy-duty trucks) weren’t equipped with immobilizer technology until the mid-late 2000s, and Kia/Hyundai did not on many models until around 2021, resulting in the “Kia Boyz” trend. The best way to tell is by looking at your key, if you have an older vehicle with a simple metal key it most likely does not have a transponder and is vulnerable to more primitive car theft methods such as hotwiring and shaved keys. See here for more detail on whether your car has security keys or not.
Top 5 Ways to Help Prevent Theft By Hotwiring
- Install an Aftermarket Alarm System that has a starter interrupt feature– These systems can provide you with deterrence, early alert notifications, tracking, and easy-to-use engine immobilization when armed.
- Install an aftermarket immobilizing device, like a Ravelco, Kill Switch, Cyclops TAM, or Battery Disconnect Switch– These options (and many like them) add extra steps and confusion for a thief trying to start your car.
- Use a Steering Wheel Lock (Club)– This classic theft method is easy to install and affordable. While they can be cut off by determined thieves, they deter many for their cost and effort, and are even better when used alongside other anti-theft devices.
- Remove a fuse or relay needed to start your vehicle– If you’re in a pinch you can remove a fuse/relay for the starter, fuel pump, etc. while you’re away from the vehicle to prevent it from starting. It is not advisable to make this your long-term solution though as it is not only a hassle, but could wear connections over time.
- Use a tracking device in case your other defenses are overcome– It’s far more important to focus on actual prevention, but being able to track your vehicle gives you an incredibly higher chance of recovery if your anti-theft devices are defeated (or you forget to use them).
Click here for our full guide on ways to prevent car theft
