BMW E39 4-Way Electric Lumbar Retrofit Kit for the driver's seat.
This kit will provide the same lumbar function as found in the "Comfort" seats and uses 24 genuine BMW parts purchased from a local BMW dealer. The only non-BMW parts are those needed to assemble the custom wire harness (solder, heatshrink tubing and cloth tape).
Requirements are that your 5 series BMW (525i, 528i, 530i, 540i) is a model year 1998 through 2003 (09/1997 production month through 12/2003). I believe the base seat frame was different before this date and I have not tested the compatibility of this kit with older models! In addition, you must have electric seats (standard or sport) and your seat frame must have 2 key features:
1. a dimple in the rear most, LOWER seat frame bar (can be felt by raising seat to highest position and running finders under the ROUND bar)
2. a cut out on the side plastic seat cover for the 4-way lumbar switch
This kit will take around 3 hours to install. The only specialty tooling absolutely necessary is a T30 Torx bit. Two wire connections will need to be made under the seat and I recommend soldering the connections.
Documentation will include five pages of detailed instructions with 7 main steps. Also included are 53 photos taken during my installation on a 1999 540i w/ sport seats. This particular installation has been working trouble-free for over 6 years.
All parts have been bench tested in order to ensure working condition.
$200 + shipping for 1 seat kit. I have 2 kits remaining.
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