Moved into a home and looks as if when the retaining wall was installed they allowed the mortar to washout and stain the bricks. What we are left with is a very ugly street facing wall. Not great for curb appeal and want to repair. Anyone can confirm that this is what happened and way to repair? Thanks in advance.
From the comments, nobody can really tell what's going on under there. Start out by pressure cleaning that corner and then scrape the mortar with a scraper or chisel to remove the thick mortar. Then you can use some muriatic acid to remove the rest of the mortar from the bricks. Test first in a hidden area. Hopefully, you'll find that the bricks go all the way to the wall. Once cleaned up, you'll want tp seal the area, neatly, between the retaining wall and the brick wall. An epoxy sealer or grout might work well.