Changing glove box lock cylinder on m37

if you can open the door, there is a small 'window' on the case inside the glove box. With a pointed tool (paper clip?) there is a tab you need to push in through the window. While holding the tab down, spin the cylinder to remove. If it is a locking cylinder, while pushing the tab down, insert the key. This will hold the tab down. Then you can turn the cylinder to remove it.

if its the outer tie rod then you can loosen the lock nut on threaded portion that attaches to the inner tie rod then remove the nut that locks the tie rod to the spindle assembly.you can hit the area were the tie rod stud goes through the hole to loosen it to remove it from the assembly.then count the number of turns to remove it from the inner tie rod end.then install the new one the number of turns you took the old one off and reassemble in reverse order.its a good idea to get the alignment done to make sure the wheels are positioned right and not wear the tires out early.

This repair is surprisingly easy, to replace the ignition lock cylinder,turn the switch to on and at the bottom of the cylinder on the column is a hole,insert a 3/16 punch in the hole and push up while turning the kel will dislodge the cylinder from the column,In order to replace the door lock cylinder you must remove the door panel to bgain access to the lock cylinder,diconnect the lock rod and the large spring clip and remove and replace the lock assembly and after installation test operation before reinstalling the door panel

1.Remove the glove box

2.Locate the filter box on the right side of the opening

3.Open the filter box lid by pulling on the clip on the left

4.Remove the old filter

5.Reinsert the new clean filter and assemble in the reverse order of removal

The heater core is contained within the heater/air assembly. The assembly is divided by the firewall. Now if only the heater core is being removed there is no need to evacuate the refrigerant from from the air conditioning system or remove the blower motor/evaporator housing.
Disconnect the negative battery cable.
Drain the cooling system.
Disconnet the heater hoses at the firewall.
Remove the glove box and the sound insulator panel below the right side of the dash. ( To remove he glove box there should be two screws underneath , you simply unscrew them and detach the glove box from the instrument panel), and of course instsallation is reverse .
Disconnect the the rod from the programmer to the blend air door by squeezing the plastic connector and pulling it out of the arm.
Disconnect the vaccuum and electrical connectors from the programmer just to the right of the heater core housing
Remove the two heater core cover mounting screws and pull the heater core cover (with programmer still attached) away from the heater housing
Remove the two core mounting screws and carefully lower the heater/air condition assembly from under the dash.
Caution : Have some old rags handy to protect the carpet from any spills of coolant .
Installation is the reverse of removal. Note: Make sure to transfer any weather stripping/sealing material from the old core or cover to the new one.

It will either be behind your glove box, or will be located under your hood by the firewall.

Behind the Glove Compartment
1. Open the glove compartment and remove all the items from inside of it.
   
2. Remove the glove compartment assembly retainer screws with a Phillips head screwdriver. Refer to the repair manual for your specific year and model series BMW for the exact location of the screws or carefully look around the perimeter of the interior glove box assembly to locate the screws.
   
3. Locate the lower trim panel retaining screws behind the glove box assembly. Remove the screws with a Phillips head screwdriver and then remove the panel.
   
4. Remove the foot-well air duct.
   
5. Loosen the retaining screws of the control module box to all you to lower it down.
   
6. Turn the cabin air filter panel retaining knob counterclockwise to open the panel. Pull the filter removal tab outward to remove the filter.
   
7. Use a shop vac to clean out any noticeable debris from the cabin air filter housing interior.
   
8. Insert the new filter and reverse the order to reassemble the foot-well air duct, the trim panel and the glove compartment assembly.
   
Under the Hood
9. Open the hood and locate the cabin air filter housing. The housing is located near the cowling on the top section of the firewall. Some models place the housing in the middle of the cowling, on both sides--left and right--of the cowling or on the passenger side cowling. Removal of the cowling and placing the windshield wipers in the upward position may also be required on certain models. Some 7-Series BMWs place the filter housings on both the left and right side undercarriage of the hood.
   
10. Release the cabin air filter duct clamp. This can either be released by unclipping the air filter duct by pressing a retaining lock with your fingers or using a flathead screwdriver to pry off a retaining rod.
    
11. Lift the cover upward--or downward on hood-installed 7-Series BMWs--to reveal the cabin air filter.
    
12. Remove the cabin air filter from the air duct. Vacuum the air duct with a shop vac.
    
13. Insert the new cabin air filter(s) and reassemble.
    

it is conceivable to remove the screws under the glove box assembly to help gain access to the lock mech. If this is not possible you might need to drill the lock. I am assuming you r not able to open the box. I f you are able to open it then replacing it is a breeze.

open box ull see 3 screws

You should be able to give you vin number to the dealer. they can cut you a new key. As for removing the lock... you need to turn the ignition to the on position then push an 1/8" rod into the small hole in the bottom of the steering colum right under the lock assembly. After placing it in the ingition lock will easly pull out. Insert the new one in reverse order.

Release the drop rod cylinder on the right side, and then squeeze both sides of the glovebox towards the center of the glove box to lower it straight down. The drop rod cylinder is held by a screw, or a squeezable clamp for releasing it. No special tools needed.