You need any post MEMS 1.9 flywheel, my personal choice is the Freelander version as to maximise the clutch plate and cover diameter.
The pattern of the reluctor is different completely on the 1800 variant of R40, and the NNN000500 ECM isn't suitable to be used with the flywheel you intend using with the PG1 gearbox.
As a result, you will need a MEMS 3 from a CVT 25/45 I cannot be sure of the part number NNN100743 seems to ring a bell, and this can be reprogrammed to be suitable with the turbo engine.
Brian
