Cutting a brick wall.....

If this piece of wall is tied into the veneer of the garage and it is sinking and pulling the garage wall with it, it's hard to see how it's removal could do anything other than improve the situation. I'd guess that your friend's explanation of the harm the wall's removal would cause would really involve some Twilight Zone concepts---unless he had the good grace to admit that he was mistaken after he thought about it for a minute. But, like Billy NY said, it's hard to visualize from a written description.

All the best, Stan

Well, it sounds as if the footing displaced and if the veneer is attached to the buildin veneer, it's eventually going to fracture and seperate. A lot of times a 90 deg with a return back for x amount of feet in a wall will provide strength to say a shear wall, but this is a veneer, no ? It's a garage with 4 walls correct ? Don't see how cutting off that veneer before it settles further is going to create a problem, should help correct a problem unless I'm missing something.

Veneer brick face is for aethstetic reasons, should not be structural, and although the footing may be part of the buildings footing whatever wall type the brick is covering ought to be fine on its own footing, after a sawcut, demo saw with masonry abrasion blade will work, a diamond blade with water won't be so dusty to cut. Once cut you will probably reveal a cavity between the brick and the wall it should be tied back to, might have to seal that up.