Moisture Barrier Concrete Basement Walls - The cracks in your basement wall won't normally weaken the arrangement of your base, but they will cause other difficulties specifically, water issues.
When it rains out, particularly if you don't have functional and clean gutters, a lot of that water builds up against the outside of your cellar wall. Unless you get routine basement wall repair to keep those cracks closed, some of that water will enter your basement through those cracks. Even if your basement has a waterproofing membrane on All the outside walls, a significant enough crack can tear or even shred the membrane and then you are in trouble all over again.
Most such cracks can be fixed from the inside in a timely and cost-effective fashion that doesn't disturb the soil or that which remains of the watertight membrane on the outside. Especially handy homeowners can even try it themselves, but it's not recommended unless you already know just what you're doing.
The perfect way to perform the basement wall repair is by injecting an expanding liquid urethane foam into the fracture. When the liquid experiences water, then it expands dramatically, forcing the foam down and up, inward and outward along the entire length and thickness of the fracture. It dries and becomes more watertight in minutes, sealing the crack absolutely. Since it begins as a liquid of about precisely the same viscosity as water, then it is going to go everywhere that the water moves. Since it ends up a foam, it's relatively simple to cut away and, if necessary, sand down some of those foam that develops inward however usually, that is not a big matter.