Outside Basement Trap Door - The cracks in your basement wall will not normally weaken the arrangement of your base, but they will cause other difficulties namely, water issues.
If it rains outside, especially in the event that you don't have functional and clean gutters, a lot of that water builds up from the exterior of your basement wall. Unless you get regular basement wall repair to keep these cracks shut, some of that water will enter your basement through these cracks. Even if your basement includes a waterproofing membrane on all of the exterior walls, a significant enough crack may tear or perhaps shred the membrane and then you are in trouble all over again.
Most such cracks can be fixed from the inside in a cost-effective and timely manner that does not disturb the soil or that which remains of the waterproof membrane on the exterior. Particularly handy homeowners may even attempt it themselves, but it is not recommended unless you already know just what you're doing.
The perfect way to perform the basement wall repair is by injecting a growing liquid urethane foam into the crack. When the liquid foam encounters water, it expands dramatically, forcing the foam down and up, inward and outward across the entire length and thickness of the crack. It dries and becomes waterproof in minutes, sealing the crack perfectly. Because it begins as a liquid of about the same viscosity as water, it will go everywhere that the water goes. Because it ends up a foam, it is relatively easy to cut off and, if needed, sand down any of those foam that develops inward though usually, that's not a big issue.