In Reply to: 540i lumbar support not working posted by Al B on June 29, 1999 at 13:05:43:
Well, at least you had the L/S option. You might remove the seat back (see below) and look things over. If it turns out something expensive is broken you might want to do the following . . .For the rest of us its the only option . . .
Down-and-Dirty Lumbar Support:
I have had a SB('shitty back' as diagnosed by my physican)for several years, and the total lack
of low-back lumbar support afforded by the E-34 seats has been a 'sore' point since the date of
purchase. Yes, power lumbar support was an option, but I understand the system cannot be
retrofitted, or cannot be retrofitted at anything approaching a reasonable cost. Here's how
you can install a fixed lumbar support in ten minutes with NO seat removal, and at NO co$t:
FIRST- Remove the hard shell back to your seat. If this is a first for you, grab the shell at
the sides near the bottom. Lift up slightly and pull the bottom of the shell straight back.
You may have to try a time or two. As the bottom pivots out, pull down. The top of the shell
has two clips that will release. Easy off, easy on. Hard to believe its a BMW part.
SECOND- Tilt your seat forward if not already so. Notice the spring wire that zig-zags horizonally,
supporting the back seating area. Notice there is one zig-zag that is substantially thicker than
the others. This is lumbar ground zero.
THIRD- Roll up a hand towel(clean and dry recommended) to the width of the lumbar area, insert
horizonally between the thick zig-zag and the seating material. The zig supports the rolled towel,
which in turn creates a lumbar support area. Sit in the seat; adjust the seat controls (your
normal position WILL change). Readjust the towel or add another. Drive and adjust again if necessary.
FINISHED- Once you are satisfied with its placement, tie it in place so it won't move. I used
nylon zips. Slide the seatback back on, pushing up and smacking the bottom until you feel it snap
into place. You are done. This works so well I should charge a fee.
Lake Forest, CA
: My 1994 540i lumbar support stopped working. Anyone ever have this problem? How do you fix this thing?