[Home](https://autoindustrija.rs/en)[Theft protection](https://autoindustrija.rs/en/car-theft-protection) # Car immobiliser Your car has an immobiliser, and thieves still start it? We fit an extra immobiliser: the engine will not start without your fob, code or phone. [Device and fitting in one price ↓](https://autoindustrija.rs/en/services/immobiliser#cena) [Call 067 774 1606](tel:+381677741606)[Message us on WhatsApp](https://wa.me/381677741606) Send us the **make, model and year.** We work in several cities in Serbia. Tell us your city. With the fob: it startsNew key: it will not start ## What it protects you from * A new key through the OBD port The thief programs his own key to the car. * The key signal from your pocket The car unlocks while the key is in your pocket? A thief relays its signal. * The cables by the headlight Through them the thief tricks the car into accepting a key. In all three cases **the engine does not start without your fob, code or phone.** Send us the make, model, year and city: [Call](tel:+381677741606)[Message us on WhatsApp](https://wa.me/381677741606) ## What you will unlock the engine with Along with the right key, the extra device also asks for your fob, code or phone. We tell you which options suit your car, and you choose. ### A fob in your pocket * You carry the fob in your pocket and the device recognises it by itself when you start the car. * Keep it apart from the key and do not leave it in the car. ### A code on the car buttons * You carry no extra fob: before starting you enter your code with the car buttons. * You enter the code on every drive. ### Phone * A paired phone you carry with you works as a fob. * We check whether your car, the device and the phone support it. ### When the fob is not with you * #### Backup Use a backup code, a second fob or a card, depending on the device. * #### Lost fob Get in touch. The lost one needs to be deleted from the device, then a new one added. * #### Fob battery If the fob has one, we show you how to replace it. Until then use the backup. * #### Servicing and car wash Switch on service mode. You do not give your fob or code to anyone. Not sure what to choose? Send us the make, model and year: [Call](tel:+381677741606)[Message us on WhatsApp](https://wa.me/381677741606) ## Price Device and installation in one price The price depends on the device and the make and model of the car. We tell you when you send the make, model and year, before the work. Payment cash or through a company ### What we agree before fitting * Which device fits your car * How the protection arms by itself * Which backup option you get * How to use service mode * How it works with an existing alarm ### Important * **Carry the fob apart from the key.** A thief who has both can drive the car. * **No subscription and no monthly payment.** * **The immobiliser does not close the OBD port. That is a separate service.** [More about OBD port relocation](https://autoindustrija.rs/en/obd-port-relocation) * **The immobiliser guards engine starting.** It does not sound or show where the car is. A [car alarm](https://autoindustrija.rs/en/services/car-alarm-installation) gives the siren, and [GPS tracking](https://autoindustrija.rs/en/services/gps-vehicle-tracking) the car’s location. ## How we fit it 1. 1 ### You send the car model Send us the make, model, year and city. Tell us how you unlock the car and whether you already have an alarm. If you know, tell us whether you want a fob, a code or a phone. 2. 2 ### We tell you which device fits and what it costs Work starts only when you agree. We tell you which immobiliser fits your car and which unlocking options go with it. You know the price before the work. The price depends on: * Which device fits your car. * What you unlock the engine with: a fob, a code or a phone. * The make, model and year of the car. 3. 3 ### We agree the time and place We agree the day and place of installation. 4. 4 ### We hide the device among the cables We connect the device to the car electronics and hide it among the cables. We route the cables through the factory wiring and insulate them like factory ones. We set up the unlocking option you chose. 5. 5 ### We test it and show you how to use it On the spot we test together the protection you chose, the backup unlocking and the service mode. You pay when we finish: cash or through a company. ## How a thief fools the factory immobiliser There is a small chip in the key. When you turn the key or press the start button, the car asks the chip who it is. If the answer is not the one the car knows, the engine will not start. So the thief works to make the car believe it has the right key: 1. **A new key through the OBD port.** The OBD port is the socket under the steering wheel where diagnostics are plugged in. A thief plugs into it and can program a new key. [More about OBD theft](https://autoindustrija.rs/en/advice/obd-car-theft) 2. **Keyless theft.** A keyless key unlocks and starts the car while it is in your pocket. Thieves pick up your key’s signal and relay it to the car. [More about keyless theft](https://autoindustrija.rs/en/advice/keyless-car-theft) 3. **The headlight attack.** On some cars a thief sends a fake message that the key is genuine through the cables by the front light. [More about the headlight attack](https://autoindustrija.rs/en/advice/headlight-can-injection-theft) **The immobiliser we fit also asks for your fob, code or phone.** For your model we check which device and which way of connecting it give extra protection. ## How you start the car with a code The code is a sequence of presses on buttons the car already has, for example on the steering wheel or the window switch. 1. **Switch on the ignition.** The dashboard lights come on, but do not start the engine yet. 2. **Press the buttons in your order.** 3. **Wait for the confirmation.** The device confirms the code is correct, for example by flashing a light on the dashboard. 4. **Start the engine.** ## After fitting 1. **Keep the backup outside the car.** Carry it with you, and you can note the backup code in your phone. 2. **Do not tell anyone the unlocking code.** Whoever knows the code can unlock the engine. 3. **Switch off service mode after servicing.** Check the protection on the spot the way we showed you. 4. **If the fob has a replaceable battery,** we show you which one it uses and how to replace it. [More about what an immobiliser is](https://autoindustrija.rs/en/advice/what-is-an-immobiliser) Updated 25 October 2026. How you start the car with a code ## Questions Can the car cut out while driving? That depends on the device and its settings. Before fitting we explain how the chosen device works when starting and while driving. Can several people drive the car? Yes. The number of fobs depends on the device. Can a thief pair their own fob? Adding a fob or a phone is protected. How it is approved on your device, we show you when we hand over the car. Does the immobiliser drain the battery? It uses a little power while the car is parked. How much depends on the device. Is comprehensive insurance cheaper if the car has an immobiliser? A discount on comprehensive insurance depends on the insurer and the device. An immobiliser by itself does not mean you will get a discount. [More about the kasko discount](https://autoindustrija.rs/en/kasko-discount) I already have an alarm. Can I also get an immobiliser? We can fit an immobiliser alongside your existing alarm. Before fitting we check how they work together. My car is older. Can it get an immobiliser? For older cars there are devices that connect differently. We will tell you which one fits your car. ## Which immobiliser fits your car? Send us the make, model, year and city. Tell us how you unlock the car and whether you already have an alarm. [067 774 1606](tel:+381677741606) [Call](tel:+381677741606)[Message us on WhatsApp](https://wa.me/381677741606) Email: [kontakt@autoindustrija.rs](mailto:kontakt@autoindustrija.rs) ## Related services ### OBD port relocation A thief finds the factory port, but without your adapter it does not work. [More about relocation](https://autoindustrija.rs/en/obd-port-relocation) ### Electronic OBD blocker The port stays in place, but it does not work for a thief. [More about the OBD blocker](https://autoindustrija.rs/en/services/electronic-obd-blocker) ### Car alarm installation A siren and flashing indicators when someone opens a door, the boot or the bonnet. [More about the alarm](https://autoindustrija.rs/en/services/car-alarm-installation) ### GPS vehicle tracking On your phone you see where the car is. [More about GPS tracking](https://autoindustrija.rs/en/services/gps-vehicle-tracking) --- Page on the website: https://autoindustrija.rs/en/services/immobiliser auto-industrija, Belgrade. Phone and WhatsApp: +381677741606. E-mail: kontakt@autoindustrija.rs.