Maybe the cotter pin/lube issue? I was having a metallic click (one man's click is another's twang, right?) on accel and braking. It got worse to the point that it would do it every time I pressed one of the pedals. Dealer replace/torqued hex nuts (where exactly, I dunno... something relating to the bearing assembly I guess), replaced cotter pins, and lubed the bearing assembly contact surface with some molykote77. It's been a week and no clicky. I've read where a lot of people are having the click issue. That's a quick easy fix for the dealer, so I'd let them try it.
Now if it only happens once when you begin a trip, at 10mph, it's the ABS system testing itself which is perfectly normal. That's best described as a springy twang click LOL.