How to disable the immobiliser smart fortwo ?

Your smart fortwo doesn’t want to start? Have you tested everything? Battery, alternator, spare keys… And you have the feeling that the problem comes from your immobiliser ? It is reasonably plausible, indeed that it is in question if your automotive doesn’t want to start anymore or stalls when starting without a reason. You want to disable the immobiliser on your smart fortwo ? You are on the good website, we have written this article to help you see more clearly and solve your trouble related to this part. First, we will see how the immobiliser works on your smart fortwo, then the different ways to disable it.

How your immobiliser system works on smart fortwo

Before describing the different choices available to you, here is a short intro to demonstrate the aim and operation of the immobilizer in your smart fortwo. This electronic part appeared 30 years ago and intends to prevent the theft of your smart fortwo. In fact, thanks to a transponder and an antenna (coil) integrated in the key, and, a immobilisation control box integrated in the ECU and a reception antenna on the neiman, your smart fortwo will go each time you put the key in the ignition, it controls that the code emitted by your key is indeed the one required by your immobilization box. It is only at this instant, that it will let you turn on your car. It is thanks to RFID technology (chip in the key) that this unit will work.

First process, your key no longer enables your smart fortwo to start, you want to turn off the immobiliser of your smart fortwo, but first of all you should try this procedure to start it and take it to a mechanic verify that you can not execute a less significant operation to restore the normal start of your car. In fact, with your car you should have a spare key (which you should try and which should start your smart fortwo), but if you don’t have it you should at least have the “code card”, it contains the start code. Thanks to this code, you will still be able to start your car by entering it manually. To do this, turn on the ignition, use your centralized button to enter the digits, several quick presses (example: 2 for digit 2) then a stop of one and a half seconds to confirm the digit and resume, replicate the operation until you have entered the whole code. This should allow your smart fortwo to start without having to remove the immobiliser.

Repair your key at a key specialist or your car dealer

If even though a battery change, several attempts to enter the immobiliser code on your smart fortwo still doesn’t work, it’s likely your key that’s at issue. We can understand that you still want to bypass the immobiliser device from your smart fortwo. In fact, your transponder must have been weakened or must have fallen off your key. To fix this problem, only option, go to a key specialist (also available on the internet) or, at your car dealer who can fix your smart fortwo key. Depending on who you go to the repair should cost you about 100 euros if you still have a duplicate or your “code card” and about 350 euros at your car dealer if you have no support and you want a new functional key, it will avoid you having to remove the immobilizer from your smart fortwo.

Manually remove your immobilizer

Although you may be tempted to bypass the immobilizer from your smart fortwo, this is not advised at all for some reasons. First your smart fortwo would be much more vulnerable to theft attempts. In fact, without an immobiliser box, simply doing “the wires” may be enough to start it. Furthermore to that, your insurance, in case of theft most likely won’t refund you if it acknowledges that the immobiliser on your smart fortwo has been removed, bypassed or deactivated. This if you still want to do it, some websites online still give the process, we have made the choice not to disclose it, because it could help people with bad intentions.

If you wish more tutorials on the smart fortwo, go to our smart fortwo category.