The top hinge of the driver's door on my "farm only" Renault is tearing away from the door pillar and needs welding v. soon.

The husband of one of Mrs NVNL's tennis partners is willing to bring his welding gear over to do the job. He is an experienced welder but doesn't weld cars and is is worried about "frying" the ECU on the Renault, which would be unhelpful.

Is the welding likely to affect electrical components in this way?

TIA

R