For 1990-2009 cars

Cause | Action
--- | ---
The seat adjuster handle is twisted or the seat adjuster handle is bent. | Straighten the handle in order to ensure that both sides release and lock at the same time. Or, replace the seat adjuster handle.
The adjuster lockbar return spring is broken. | Install a new adjuster.
The lock sticks or the lock binds on the adjuster. | Lubricate the lockbar pivot. If the lockbar is binding, eliminate the cause of the binding or replace the adjuster.
The cross-wire is bent or the cross-wire is hung up. | Route the cross-wire correctly or replace the cross-wire.
There is an obstruction or the lockbar is bent. | Clear the obstruction or replace the lockbar.
The cross-wire is missing or the cross-wire is disconnected. | Connect or replace the cross-wire.