Speedo & trip counter not working

wheel speed sensor bad.

might be the sensor on the gearbox that is faulty or wire is damaged and going to earth.

try and pull the shafter in and out of park a few times and try again

iv got the same problem in my 7 series 728i 1999 tv sat nav phone and sensors were working fine all of a sudden gone off

If the ABS (and likely the traction control) light came on at the same time that the speedometer stopped working, you likely have a faulty wheel speed sensor at the right rear wheel. You can test this by swapping the two rear wheel speed sensors (ABS sensors). If the speedometer then works (but the ABS & Traction control lights stay on), replace the sensor that is now at the left rear (was at the right rear). If no change, you may have a fault in the ABS & Traction control - control unit.

Rear wheel speed sensor at www.bavauto.com

http://www.bavauto.com/shop.asp?HC1=0&Htarget=search.asp&HCY=2001&HCM=330i&SearchStr=rear%20abs%20sensor

Hi- happened to me last night. You will need to replace fuse number 7 (Vehicle Speed Sensor). It's a 10Amp small blade fuse

my rear passenger door will not open with central locking bmw 728i

try replacing the speed sensors.

is it just the speedo not working?....or is the abs as well ...because i had the 95 740i and they just stop working too ..and no one could figure it out

When the car is stationary. Push down on the back (Boot or TRunk) as hard as you can a few times & listen for the squeek. It's more common in the rear suspension from my experience. It sounds like the bushings are gone or worn at the top of the suspension struts.
That's if it does squeek. You might not need your suspension replaced just the bushings as they are normally plastic.
Try doing the same by pushing down at the front of the car also as it maybe happening there too.