1998 528 i BMW.Where do I begin?

first unlock the door remove screw behind the handle,panel will pull off

Your linkage to open the door in disconnected , the lock assemble will need to be removed for the solution

TO REMOVE THE REAR DOOR PANEL YOU FIRST HAVE TO REMOVE THE PLUG FROM BEHIND THE DOOR HANDLE,
THEN REMOVE THE SCREW THAT IS BEHIND THE PLUG.
THEN YOU GO AROUND THE PERIMITER OF THE DOOR PANEL WITH A WEDGE AND GENTLY PRY THE PANEL OUT, IT IS HELD ON BY PUSH PINS FROM THE WOOD TRIM PANEL DOWN TO AND ALONG THE BOTTOM OF THE DOOR. ONCE ALLOF THESE ARE LOOSE THEN YOU HAVE TO LIFT THE PANEL UP OUT OF THE WINDOW SILL AND OVER THE DOOR LOCK IT SET INTO A SHORT CHANNEL AROUND THE FIRST SRCEW REMOVED ALSO
ONCE YOU GET IT UP AND LOOSE BE CAREFULL AS ALL THE POWER WINDOW SWITCH AND LIGHTS ARE THERE AND NEED TO BE DISCONNECTED.

ONCE HERE GOOD LUCK I BELIEVE THAT THE FRAME WORK INSIDE THE DOOR NEED TO BE REMOVED TO GET AT THE MECHANISIUM THAT OPERATES THE WINDOW.

YOU WILL FIND A PINK PLASTIC WHEEL BROKEN AND A SHORT CABLE THAT IS PART OF THE WINDO OPERATION,

THIS AS FAR AS I GOT BEFORE I GAVE UP

GOOD LUCK

Pain but fixable. Sounds like the linkage is not connected. Even a mechanic will have to remove the door panel and fight with it. If you can remove the rear seat from the drivers side side door then you might have room to remove the passenger side door panel to fix it. Usually clips are the first thing to break on door handle/latch linkages

2004 x3 Rear passenger door handle came off/apart. What are the steps to remove the inner door panel to access the door handle and repair it?

if the motor doesn't work even from the switch from the driver's side the problem is from the motor.
to replace it you need to take out the door panel:

take out the switch with a screwdriver
by that you can get access to one of the screws that hold the panel
take out the plastic caps from the lower area of the armrest, there are some more screws
take out the plastic trim from top of panel begining from the end of panel, and unscrew the 2 more screws
it should come out after doing all that
remember to disconnect the door latch cable and speaker wiers

I had the same problem on the rear door of my 1998 528i and it was the door actuator that had gone bad. I had to take the rear seat out to get the door panel off. Once I had the door panel off it was not that difficult to replace the door actuator.

hello,seems your door brake is stuck-up,remove your door siding,then put some grease or replace your door brake,ty

how to change passener side door lock assy on 04' bmw 530i?

chances are, the motor is fine. the regulators break all the time though. You can install it yourself with a little common knowledge. First obtain a new regulator for the respective door from your local dealer. To begin, remove the door panel. use a small screw driver to pry off the wood trim at the top portion of the door panel starting from the rear and moving forward. then pry out the small cover by the door pull as well as the 2 covers underneath the armrest. use a T-20 torx driver to remove the 5 hidden screws. then pry the door panel off of the door being careful not to ruin the clips or tug on the wiring. set the panel aside. now you will need to remove the side airbag (if applicable)using a 10mm socket. release the locking tab on the plug by prying it up approx. 1/4 inch, and then pull the plug out of its connector. be careful not to turn the key on with this unplugged or the airbag light will be tripped on. if you must , re install the plug so that the computer can "see" it. Now remove the vapor barrier using a razor blade. be careful not to rip it. once the inside of the door is exposed you should remove the 3 T-30 torxes on the window motor. then tilt the motor out of its bracket and remove it. you may have to pry at it depending on how tight the cable tension is. Now that the regulator is left in the door you have to remove it. lift the window by hand up in the door until you can see the two 8mm screws attaching it to the regulator through the 2 rectangular slots in the regulator arms. if the window is jammed down and will not move, use a pair of **** or wire cutters to cut the cable to free it up. now remove those 2 8mm screws and push the window back and up into the door where it goes when you roll it up all the way. now remove the 5 10mm screws holding the regulator to the door. install the new regulator into the door and bolt it in place. pull the window down and install the 2 8mm screws. re install the motor, vapor barrier, and airbag. then press the door panel back onto the door and bolt it back in, and finally install all of the covers.