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Since I'm here, could you tell me what that large red switch in the bottom left corner of the fuse box does? I assume it disconnects the power, or am I wrong? If so, do you know which systems it controls?

Thank you all for your replies. So, to sum up, my version doesn't have the anti-theft system (I also verified it by doing some tests as you suggested). It's not a big problem, but I'm just puzzled because the diagrams showed the system as non-optional.

I'll give it a try and let you know. Thanks

Sold in Italy, left-hand drive.

Good point. I didn't notice it from the picture. Thanks for you offer! I am sending you a private massage.

Hi, I have a second-hand Fabia Mk4 (manufactured in early 2023), and I’ve noticed, as you can see from the picture, that I’m missing a couple of fuses in fuse box C that are related to the anti-theft systems. Specifically: Fuse 28 - Anti-theft sensor Fuse 29 - Anti-theft device sound signal Based on my understanding of the workshop manual, these systems are part of the basic equipment and should be present in every version (as shown in the circuit diagram below). Is it possible that the previous owner removed these two fuses? Thanks!

Thank you both for your replies. That would be similar to blowing a fuse or simply removing it. I would also expect to see a number of errors logged in the system. However, once the fuse is replaced, I wouldn't expect the EML to remain on. I had planned to test this by removing one of the fuses, but now I'm a bit concerned...

I would like to install a kill-switch as an anti-theft device (either with a button or possibly with a remote control) that disables the starter motor or, even better, the fuel pump. However, I noticed that the keyless ignition system (the one with the button, to be clear) is quite different from the normal key-based systems. In fact, all the engine systems, including the fuel pump (I assume, correct me if I am wrong), are activated when the door is opened, so that when the button is pressed, the system is already primed with fuel. Unfortunately, this prevents me from using a kill-switch on the fuel pump. So, if I’m not mistaken, the only option left is to interrupt the starter motor (the starter motor). Has anyone here already experimented with something similar and can share their experience? To avoid voiding the warranty, I would like to avoid cutting the wires. So, the simplest solution would be to act on the fuses (by replacing them with a custom circuit), but this is also the easiest for thieves to detect. A more reliable but more complex solution could be to dismantle the fuse box and add new connectors to create the secondary circuit. I haven’t dismantled the fuse box yet, so I can’t tell you how feasible this solution is. In theory, I think it could also be possible to act on the fuse that detects the position of the clutch pedal. In fact, if the clutch is not pressed, the starter motor doesn’t turn on. Any ideas or suggestions are welcome. Thank you.