MEMS 1.9/2.0 to MEMS 3 conversion.

From the looks of things, you will need:

- New "T-piece" at the exhaust-side of the head (with the extra sensor)
- A MEMS3 ECU (and matching to the 5AS system)
- A later inlet manifold with all the sensors
- A later Alternator
- Coil Packs (VVC's shouldnt need this)

Your biggest problem will be the loom, the loom is not just plug'n'play........

ATTENTION: This topic is for a VVC, I am doing a MEMS3 on my MEMS1.9 1.6 ROVER Cabriolet


What is the T-Peice mate ?

I have a couple of looms, I have a 1.8 turbo loom and also my 1.4 25 MEMS3 loom, its a lot of work
but my plan was to just do a full loom swap, remove it all from the Cabby and replace with the 25,
the cabby is coming to bits to rust proof and do an A/C conversion and replace all the interior so I
might as well.

talkingcars wrote: - Coil Packs (VVC's shouldnt need this)

rover-25x wrote: ATTENTION: This topic is for a VVC, I am doing a MEMS3 on my MEMS1.9 1.6 ROVER Cabriolet

Hopefully we will end up with a guide for 1.9 and 2J to 3, and without wanting to alienate any one this is a MGF/TF forum so threads and how-to's will favour these cars.

How long would you think a pro would take to do the work I am thinking of the loom.

I am trying to be "clever" and create a plug and play loom which is obviously more involved but if the pro knows all the loom colours and just does a cut and solder change on the car it shouldn't take more than a couple of hours.

Do you have a list of models and years of what cars run 3, 2J and 1.9 ?

Mk 1 MGF MPi runs MEMS 1.9
Mk 1 MGF VVC runs MEMS 2J
Mk 2 MGF onwards run MEMS 3 regardless of engine

200 and 400 16v run 1.9 except the BRM that is 2J, 8v run 1.6
25/ZR and 45/ZS run 3 except the V6 that runs a Siemens 2000

75/ZT is a BMW

Great info mate.

MEMS 1.9 was fitted to MGF until VIN 522572, this includes early Mk2 MGFs MY 2000, such as my Wedgwood SE. This data came from Dieters MGF site .

Only found this out during research on my ABS system !