Interesting house with a defect in the basement

Good day,

we have the opportunity to buy a house. Everything is perfect except for one exterior wall in the basement (see attachment). There is a crack in the concrete wall where water definitely comes through. Now my question is, how could such a problem be fixed? As mentioned, this is the exterior wall of the basement. Under this part is the driveway to the garage. What could be done? "Digging" from the outside? Who is best to contact? I would like a price estimate or a statement on whether the damage is so severe that it should be avoided.

I would appreciate any answers.

Find a company that specializes in drying out and have a representative from them take another look at the matter.

Only an expert can tell you what you can do and how much it will cost. Everything else is just crystal ball reading. Have you already walked through the house with an expert? This is just an obvious defect.

No, we have not yet gone through with an expert. We only viewed the house yesterday.

What does the seller/agent say about it? Is the house priced "too low" on the market?

There is no real estate agent. The seller is not the owner (inherited from grandmother). Cannot say much about the damage. Just said that when it rains heavily, it drips at that spot. He does not know how long the damage has existed. The price is relatively okay 230000 for a semi-detached house fully basemented and with a converted attic. Living space approx. 130sqm + 20sqm attic. Plot approx. 380sqm with garage. Year of construction 1991. Area Osnabrück