VTCS Solenoid - Miata 1.8L & 626 2.0L
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, 2002 Mazda MX-5 Miata, and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
See VARIABLE TUMBLE CONTROL SYSTEM - MIATA 1.8L & 626 2.0L under AIR INDUCTION SYSTEMS.