Like the title states....Will a 1999 Civic Ex door fit onto a 1997 Civic Hatch Dx?

 

yes i think if its a coupe it will fit a hatch

 

'96-'00 Civic coupes and hatches have the same door skins. The internals and door skin (the plastic panel) can be different though since the CX and DX did NOT have power options while some coupes did!

If you're doing a power door conversion, the '96-'98 harnesses use different plugs then the '99-'00 harnesses.