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Old 08-14-2003, 11:34 PM   #1
Scooby Specialist
Member#: 7480
Join Date: Jun 2001
Location: So San Francisco
WRB WRX 5 Door
VS2 12.9 @105 MPH-4EAT

Default Will a 2003 ECU work in a 2002 WRX ?

I want to buy a stock ECU to have as a back up or when I sell it. I have a 2002 WRX 4EAT and found a 2003 WRX 4EAT ECU for a great price. Anyone have any experiance with a simular swap out?

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Old 08-15-2003, 04:42 AM   #2
Scooby Specialist
Member#: 9752
Join Date: Aug 2001
Location: Berkeley
2002 WRX Wagon


I believe the firmware is different between the 02s and 03s. 03 cars work on 02 ECUs, but not vice versa. Of course, with an ecutek flash you can convert that '03 into an '02 and it should magically work.
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Old 08-15-2003, 09:39 AM   #3
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Member#: 1594
Join Date: Jun 2000
Chapter/Region: MWSOC
Location: Carson, IA
1999 2.5 RS
2002 Legacy


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