Sir Coil Assembly
WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
SIR coil assembly consists of 2 or more current-carrying coils. SIR coil is attached to steering column and allows rotation of steering wheel, while maintaining continuous continuity of driver-side air bag module deployment loop.