How to disable the immobiliser BMW 3 Series ?

Your BMW 3 Series doesn’t start anymore? Have you tried all kinds of things? Battery, alternator, spare keys… And you have the feeling that the trouble comes from your immobiliser ? It is actually plausible, actually that it is in question if your car no longer wants to start or stalls when starting for no reason. You want to disable the immobiliser on your BMW 3 Series ? You are on the good article, we have created this content to support you see more clearly and fix your problems related to this part. First, we will see how the immobiliser works on your BMW 3 Series, then the different methods to disable it.

How your immobiliser system works on BMW 3 Series

Before explaining the different choices available to you, here is a short intro to describe the role and operation of the immobilizer in your BMW 3 Series. This electronic element came out 30 years ago and aspires to prevent the theft of your BMW 3 Series. In fact, thanks to a transponder and an antenna (coil) included in the key, and, a immobilisation control box included in the ECU and a reception antenna on the neiman, your BMW 3 Series will go each time you put the key in the ignition, it checks that the code emitted by your key is actually the one required by your immobilization box. It is only at this instant, that it will permit you to turn on your car. It is thanks to RFID technology (chip in the key) that this device will work.

First methodology, your key no longer enables your BMW 3 Series to start, you want to disable the immobiliser of your BMW 3 Series, but first of all you should try this procedure to start it and take it to a garage verify that you can not accomplish a less important process to reestablish 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 BMW 3 Series), but if you don’t have it you should at least have the “code card”, it includes 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, duplicate the process until you have entered the full code. This should enable you to start your BMW 3 Series without having to remove the immobiliser.

Repair your key at a key specialist or your car dealer

If despite a battery change, different attempts to enter the immobiliser code on your BMW 3 Series still doesn’t want to start, it’s likely your key that’s at issue. We can understand that you still want to bypass the immobiliser device from your BMW 3 Series. In fact, your transponder must have been damaged or must have fallen off your key. To resolve this trouble, only solution, go to a key specialist (also available on the internet) or, at your car dealership who can fix your BMW 3 Series key. Determined by 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 dealership if you have no support and you want a new functional key, it will avoid you having to remove the immobilizer from your BMW 3 Series.

Manually remove your immobilizer

Although you may be thinking to bypass the immobilizer from your BMW 3 Series, this is not recommended at all for many reasons. First your BMW 3 Series would be much more vulnerable to theft attempts. In fact, without an immobiliser box, simply doing “the wires” may be enough to turn your car on. In addition to that, your insurance, in case of theft most likely won’t refund you if it realizes that the immobiliser on your BMW 3 Series has been removed, bypassed or deactivated. This if you still want to do it, some sites still give the methodology, we have made the choice not to disclose it, because it could help people with bad intentions.

If you wish more guides on the BMW 3 Series, go to our BMW 3 Series category.