NM 43 occurred two separate times.

In the late 1920s it extended from NM 33 near Cloudcroft to US 366 near Ruidosok, but by 1932 it was marked as an extension of NM 24.

The third alignment of NM 43 was created in the 1950s and was a short spur of NM 44 near La Ventana.

This NM 43 was removed from the highway system in 1990.

This New Mexico road or road transport-related article is a stub.