1994-D Lincoln Cent Repunched 4?

Often times you have to take into account what's going on around the area in question. Note that there are two other areas with split plating just like what's inside the 4 of the date. All three areas are to the right of something else, which is also generally indicative of split plating. That's the zinc core you're looking at through those splits. They are rather common and command no premium value.

Coppercoins knows. In terms of repunched dates, I think the last year that was possible was 1908 IHCs. From 1909 onward, the date was on the hub.

The last year that the date was punched into the working dies was in 1908. After that year, the date was engraved into the master die, which in turn made the master hub, which then made the new master die for that year. For the next year's master die, the last year's master hub had the last two or three digits in the date abraded from the hub, which in turn made a new master die. Then the two or three digits that were missing on the master die were engraved into that die, which then made a master hub, which made the new master die for that year.

That's interesting to be reminded of the exact die-making process involving the date on US coins!
US die-making processes diverged from many other countries in 1909, where those mints continued to sink dates into individual dies...into the 1940s, some even more recently.

Are you sure that is a plating split? I see no silver color like you do with the split by the mintmark. Also if it was a split it would seem to come from the diagonal of the 4 since it parallels it (And splits tend to be on the radially outward side.) I was thinking it looked like a die gouge. Also the lighting highlights seem to indicate that the feature is raised on the coin. (lighting highlights are the same as that of the diagonal of the 4, lit on the upper left and shadowed on the lower right.)

You learn something new everyday.

I thought I included this image, but I guess I forgot?