Hi,
you need a JTAG probe like Multilink or Cyclone (this one is suitable also for production programming):
PEmicro | Experts in Embedded tools for Flash Programming and Development
Then you can use SW tools from PEmicro for programming or you can use S32 Design Studio:
https://community.nxp.com/docs/DOC-332252
Of course, there are also other vendors providing flash programmers...
Regards,
Lukas