Builder 10 yr Warranty will not cover that.**
They likely laid the brick on a wood ledge, or didn't bolt(support) angle iron under the window properly. Also no weep holes above flashing (likely water stains in garage ceiling)
From the sloppy, washed joints under the window, looks like they tried repointing the brick already. To fix it right, that roof is coming off, needs to be flashed properly, brick removed, flashed, and replaced from ledge to bottom of window.
** most warranty books would have builder repair by caulking cracks/repointing brick with gaps larger than 1/4".
Looked it up in our book:
