Q: Key will lock doors and trunk, but not unlock doors on 2004 BMW 645Ci

asked by on

I am having difficulties with the passenger window and also the key control.

Passenger window: It is possible to lower the passenger window using the window control, but it will not bring the window up.

Key control: I can use my key to lock the car’s doors, however the key will not unlock the doors.

It will open the trunk, lock all doors, and also will set the alarm. But even if I push the key more, it will not unlock the doors.

In your professional experience, what are the causes to these two problems and how can they be repaired?

Hi there. The first thing I would do is try another key to see if you get the same results from the key control. If the separate key works, then it is the key that is the problem.

If not, then I usually start by reprogramming the receiver module first. If that does not help, then the module may need to be replaced.

As for the window, if a window will go down and not up then the left actuator is bad. It takes more effort to close a window, so a failing actuator cannot close the window. If you need to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your door locks and windows so that you can have the correct repairs done.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Key will lock doors and trunk, but not unlock doors on 2004 BMW 645Ci

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Automatic locks on my car are locking/unlocking on their own

The body control module controls the locking function. If there is a conflict in one of the door locks that tells the module it is not closed or not locked, the module will cycle the locks. First, try replacing the...

Q: Car radio dead

Hello, this could be a simple problem to fix. If the fuse is blown it will cause the radio to have no power. You could also just have a bad radio, and if this is the case, the radio unit...

Q: How do I replace the remote keyless entry (RKE) transmitter battery of a 2012 Chevrolet Equinox?

The remote keyless entry (RKE) transmitter gets a lot of use, as it helps you lock and unlock your vehicle with regularity. As a result, the battery can sometimes die. You can replace the battery in the RKE transmitter yourself:...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.