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Bmw immobiliser problem

I changed the battery in my 1996 bmw 523 and it now won't start. It doesn't even turn which makes me think it's the immobiliser cutting it out. Does anyone know how to fix/ re code it? I don't really want to spend a lot on the car as i only recently bought it for my mum. Just wish the bloody thing would work!!!

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Bmw 2005 116i doesnt start and even the dashboard doesnt light up when key is inserted


no voltage

could be battery flat or loose terminals
alternator
start motor
engine bay fuses or relays

next to check os immobiliser

if you cant sort it .. may need a tow to the bmw service center

May 18, 2016 | BMW Cars & Trucks

Tip

I removed the battery and now the car won't start


'I disconnected the car battery/changed the car battery and now my car won't start'

Another common question on Fixya.
You've done nothing wrong. It's simply that the immobiliser doesn't recognise the key.

Put the key into the ignition. Turn the ignition on. Press the LOCK button twice on your remote. Wait 1 minute.

Turn the ignition off and press the UNLOCK button on the remote a couple of times. This will disarm the immobiliser.

The key should be recognised and your vehicle will start.

on Feb 19, 2016 | Cars & Trucks

2 Answers

Townace won't start!!! Help!!!


First thing I would do is make sure the batter cables are secure and tight to the battery post and make sure the red cable is to the + side of the battery and black is on the - side of the battery. They need to be tight and snug in order to put out the amps needed to start the car. YOu can also put a trickle charger on the battery over night at the 2 amp setting and make sure it is charged up. I would guess one of those problems is what is causing you your grief.

Good luck

Jul 23, 2013 | Cars & Trucks

1 Answer

Wont start 2003 bmw 330xi


Remove battery terminals and clean both posts and terminals
with sandpaper until you see shiny metal. The black coating is lead sulphate which has a high resistance to current flow both into and out of the battery. Also check the battery in you key as the immobiliser may not be reading it.

Jun 09, 2013 | Cars & Trucks

1 Answer

I have 2007 bmw 120d it' turns over but won't


Check engine immobiliser and key battery.
Have the fault codes read for faults Replace the faulty units with genuine one
because most aftermarket units are not set for OEM cpu units and are not
completely compatible.

May 04, 2013 | Cars & Trucks

1 Answer

Won't start


Switch on head lights or cabin light. If they doesn't come on or is weak, the battery is flat. Ensure that you switch off the lights.
With ignition switched on, assuming the lights on the instrument panel cames on and your immobiliser is deactivated, turn ignition to start. You should hear the solenoid at the starter making a click sound. If not, the battery is flat or the starter solenoid is faulty. If it does make a click sound, the battery could be too low to turn the starter or the starter is faulty. Assuming the immobiliser is working correctly, and the starter tries to turn the engine but it doesn't want to turn, the gasket could be blown and the cylinder filled with water, or the engine could be seized.
Hope it is not the last case. MarioCpt

Mar 06, 2012 | 1999 Toyota Corolla

2 Answers

Bmw 523 petrol,immobiliser problem is there a way round this nightmare?,turns over wont start,its an auto cant even push out of the way,


Hi

There is one method you ca try, first ensure the car is unlocked but with the keys out of the car. then disconnect the battery for about 2hrs, overnight if possible. this should reset the car immobiliser and ECU. When putting the battery back on connect the red first then the black i that order.

If no joy get back to me I have a few oher solutions.

Regards and happy new year
Dan

Jan 01, 2011 | 2001 BMW 5 Series

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