Differences between 02 and 03 WRX ECU?

DubuRX · 08-23-2004, 10:28 PM

I am selling my 03 WRX ECUtek tuned ECU.

I'm wanting to know if this would go into an 02 as just a drop in? Is there any differences between the 2 years?

Thanks for the info.

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mbiker97 · 08-24-2004, 08:51 AM

I'm almost certain they are the same. Find someone with an 02 and plug your ECU in.

bikerboy · 08-24-2004, 10:09 AM

They have different part numbers. An 02 is aj242 the 03 is aj243

jnmarshall · 08-25-2004, 03:42 PM

Don't quote me on this, but I believe you can install an '03 flashed ecu into an '02. But you can't use a stock '02 in an '03. (or the otherway around, can't remember which) I asked Cobb about this a couple of months ago when I was thinking of trading ECUs. They said the stock '03 has an extra sensor input (and code in the ECU) that's not present on the '02. They said thier reflashes ignore that and can be used in either year.

wrxdaddy · 08-25-2004, 06:33 PM

http://forums.nasioc.com/forums/showthread.php?t=513289

08-23-2004, 10:28 PM	#1
DubuRX Scooby Specialist Member#: 24307 Join Date: Sep 2002 Chapter/Region: SWIC Location: AZ Vehicle: 05 Evo MR AWD LUV	Differences between 02 and 03 WRX ECU? I am selling my 03 WRX ECUtek tuned ECU. I'm wanting to know if this would go into an 02 as just a drop in? Is there any differences between the 2 years? Thanks for the info. * Registered users of the site do not see these ads.

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08-24-2004, 08:51 AM	#2
mbiker97 Scooby Guru Member#: 7922 Join Date: Jun 2001 Chapter/Region: MWSOC Location: Tucson Vehicle: 04 CTS-V b/b/b 99 GMC Highrider	I'm almost certain they are the same. Find someone with an 02 and plug your ECU in.

08-24-2004, 10:09 AM	#3
bikerboy Scooby Specialist Member#: 5477 Join Date: Apr 2001 Chapter/Region: MWSOC Location: in the garage! Vehicle: 2007 R171.473 2009 SWP Spec B	They have different part numbers. An 02 is aj242 the 03 is aj243

08-25-2004, 03:42 PM	#4
jnmarshall Scooby Specialist Member#: 40500 Join Date: Jul 2003 Chapter/Region: TXIC Location: DFW, TX Vehicle: 11 wrx Virtual	Don't quote me on this, but I believe you can install an '03 flashed ecu into an '02. But you can't use a stock '02 in an '03. (or the otherway around, can't remember which) I asked Cobb about this a couple of months ago when I was thinking of trading ECUs. They said the stock '03 has an extra sensor input (and code in the ECU) that's not present on the '02. They said thier reflashes ignore that and can be used in either year.

08-25-2004, 06:33 PM	#5
wrxdaddy Scooby Specialist Member#: 14164 Join Date: Jan 2002 Chapter/Region: TXIC Location: 32.9765°N 96.8867°W Vehicle: 02 Impreza Wgn 95 L Project in progress	http://forums.nasioc.com/forums/showthread.php?t=513289