Lumbar Motor: Description

WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.

The power seat system includes an electrically operated lumbar support mechanism. The power lumbar adjuster and motor are concealed beneath the seat back trim cover and padding, where they are secured to the seat back frame.

The power lumbar adjuster mechanism includes a reversible electric motor that is secured to the inboard side of the seat back and is connected to a worm-drive gearbox. The motor operates the lumbar adjuster mechanism in the center of the seat back by extending and retracting the mechanism. This action compresses or relaxes a grid of flexible slats. The more this grid is compressed, the more the slats bow outward against the center of the seat back padding, providing additional lumbar support.

The power lumbar motor and adjuster cannot be repaired, and is serviced only as a unit with the seat back frame. If the power lumbar motor or adjuster are damaged or faulty, the entire seat back frame unit must be replaced.