Electric switch is broken need help to replace seats on BMW Z3 1998
There are 4 bolts holding all car seats if you can get at least 2 off than you should be alright as long as you can squees a hacksaw or dremel to be able to cut along the seat rail that will remove the seat so you have access to the other 2.
The seats are only held on by 4 bolts, 2 different sizes, the back being slightly bigger as i remember. After you get them unbolted tilt the seat forward and release the 4 wired connections underneigth the seat and lift the seat out.
To replace the electric button on the side (seat adjustment button), after removing the seats you must remove the plastic trim at the bottom. Stop before you do that though and make sure that it is that piece that is broken, and not the button itself. That happened to me and after all the work I did to remove the seat and disassemble it, i merely had to replace the button and didnt have to remove anything. Just look on the button, and on the outside of the unit on the seat and look where plastic would have been broken off.
Bushings in seat are shot. See this link: http://www.youtube.com/watch?v=DM4KSnA58EI
SOURCE: BMW Z3 SPORTS CAR 1998
its the dreaded seat rock syndrome, plenty of fixes on the forums, basically you have to replace spacers in set drive mechanism. I did with the help of a friend after ordring bushes and it was quite easy.
SOURCE: 1998 BMW 528i Electric problem in the dash board
replace relays and fuses for the power seat and windows.change dash light bulbs.if bulbs are good you got wiring problem check ground wires.
SOURCE: 1998 BMW Z3 2.8 Idles rough when cold starting in wet weather
the problem could be in air mass flow sensor, but it's expensive
SOURCE: bmw z3 passenger seat goes forward backwards but
It can also be theseat motor since there is seperate motors for up/down & forward/backwards. You can test the switch to see if you are getting power to the connector on the motor by using a multimeter.
If there is power to the motor, I would remove the motor and give it a tap on the ground. Alot of the time the motor is fine, and the tap will free it up again. If it doesn't work you may be up for a new seat motor. Giving mine a tap solved the issue with mine.
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