My 2006 325I door wont lock, Is this a fuse problem, alarm immobiliser issue or a n door actuator issue. Thanks, John

Check fuse and/or relay to see if blown/non-functioning. Should be labeled door lock or dr lock.

Wondering if the door lock mechanisms needs greasing
like some form of resistance to movement may put the power locking out of kilter ..

You should be able to reset the system by locking and unlocking the drivers door with the key.

The locks on your vehicle are electronically controlled by the BCM - body control module . The driver an passenger door switche's are input's to the BCM . Do you know anything about automotive electronic's ? anti theft alarm remote, could this be part of the problem , No it's just a key less entry remote , nothing to do with the anti-theft .
Door Lock System Components
The Power Door Lock System consists of the following components:
• Body control module (BCM)
• Driver door lock switch
• Front passenger door lock switch
• Door lock actuators in each of the doors
• IBCM (PWR) 15-amp fuse

Door Lock System Controls
The Power Door Lock System is controlled by the body control module (BCM) and can be activated by any one of the following:
• A door lock switch Lock or Unlock actuation
• A keyless entry transmitter actuation
• An automatic door lock actuation
• An automatic door unlock actuation
• A last door closed locking (LDCL) actuation

Driver and Passenger Door Unlock Operation w/o Keyless Entry
When the body control module (BCM) detects a transition of either of the door lock switches to the Unlock position, it switches the door lock actuator unlock control circuits to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the driver passenger door lock actuators transition to the Unlock position.

Your best bet , take your vehicle to a qualified repair shop ! Need special tool to diagnose .

Power Door Locks Inoperative

Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, observe the door lock switch parameter in the Doors data list.
Does the scan tool display Idle?
YES - Go to Step 4
NO - Go to Step 8
4
Activate the driver door lock switch to the LOCK and UNLOCK positions.
Does the scan tool display Idle?
YES - Go to Step 9
NO - Go to Step 5
5
Activate the front passenger door lock switch to the LOCK and UNLOCK positions.
Does the scan tool display Idle?
YES - Go to Step 9
NO - Go to Step 6
6
With a scan tool, observe the driver door lock actuator command and the passenger door lock actuator command parameters in the Doors data list.
Activate a door lock switch to the LOCK and UNLOCK positions.

It could be an alarm programming issue. If you have an aftermarket alarm system check the fuses on the alarm brain, normally the brain is under your drivers dash or drivers side kick panel area, if its a factory alarm then it may be same issue or it could be a power issue with the factory alarm brain, also you may have a power door lock actuator problem, if the actuator is failing then it has to be replaced.

you need to reset alarm/immobiliser.lock car with remote, hold button down for 30 secs,then press/hold down unlock button,should reset.another way is with key in ignition/turned on, press alarm button down and hold for 30 secs.this resets immobiliser.toyota
systems vary..depending on market.

Not a solution just another problem...Lost my car fob key, have a replacement key no circuit. As I open door, sets off immobiliser like above for20 mins. I had someone look under the glove compartment but that got me no joy. How can I (non techy) resolve this so I can drive my baby home...Vreg Avensis1.8 model?
many thanks

if you have a valet key, stick it it on the passenger side when unlocking door, so it wont alarm while you open the door hope that helps

There is a way to override the code, however you need the code number. The only other way is to sit in car with door shut, play with the central locking button on dash, locking and unlocking. While doing this occassionally turn the ignition on and off. If you do it long enough, you may find the immobiliser light goes out, if it does, quickly start the car.

TL

have a look at fuse no 14,mine was blown