Future proofing 1.8vvt

  1. My model of MX-5 is: __2002 S-VT
  2. I’m based near: __London
  3. I’m looking for technical help or recommendations on: __Bristol

Madge my '02 S-VT is currently having a shed load of work done up in Ilkeston and I have spotted an opportunuty to pick up a used '03 vvt ECU all the locks and keys, which given the non availability of new items seems prudent to keep in stock as a backup should anything go wrong with my existing units. Would I be correct in thinking all 1.8 vvt engines run the same ECU locks and there were no updated connectors and such ?

TIA