The airbag ding, usually after I make a left turn.
And while using the radio buttons on the steering wheel, when it gets to FM, it's trying to scan the bands on its own.
When it's happened before, I usually assume it's one of the resistors I have in place of the curtain airbags (resistor is just sitting in the plug and shakes loose), but the left turn only and radio scanning points to the clockspring again.