What is in my '03 Mini R53 JCW??

by **feraloid** » Sat Jun 05, 2021 12:02 am

Hi all!

A couple years ago I purchased a very tired 03 JCW (these were upgraded from stock R53 at the dealership). It currently has 193K Miles/308K Km. After new head gaskets, trans swap with a newer car, new clutch, bunches of new gaskets, etc. it's running well again. I had to swap out the supercharger with a standard S ('06) as this one was damaged by age and a failed water pump. The replacement SC doesn't have the reduction pulley from the JCW yet, just stock.

When I looked on INPA at the ECU, it looks like it was reflashed in '07 at 68k Miles. I have no details of the what was flashed onto the ECU other than what INPA shows me:
Date of production: 28.08.07
Change index: DA
Software number: 7547867
Official number: 0
Assembly number: 7547866
Program Serial Nr: 12345
Workshop number: 11111
Odometer: 68400
Program number: 901303
record count: 1

I've been trying to DIY my way through finding and understanding ecu maps, but I have a long way to go. I've purchased an MPPS and have gotten a .bin file (attached), but haven't figured out what I am looking at. A solid flywheel was installed around '09 (by the date code). But I think that was after the re-flash.

I'm not wanting to change the tune or anything right now, as I may replace the SC pulley back to 15% in the future. I was just wondering if anyone can tell if the current software on my ecu is just factory JCW, or if someone has changed it.

Any information would be greatly appreciated!

Many thanks!

by **adriancl** » Sat Jun 05, 2021 10:55 am

Your car is not genuine JCW, have a JCW kit installed by the dealer.Kit contain ported head, 380cc injectors ,11% supercharger pulley,intake mods, ECU with JCW sw.

by **feraloid** » Sun Jun 06, 2021 4:50 pm

Thank you for the reply!

That's what I recall reading about the JCW option on the early models.

So my software is just the "standard" dealer flashed JCW software and hasn't been altered?