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How to find a compatible ECU replacement?


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I am looking for a back-up ECU.  I have a 2001 Subaru Legacy M/T ECU with the following ECU code#:

 

22611 AD86F

 

When I searched online, I found an ECU from a 2000 Legacy:

 

22611 AD86FRA

 

Is this compatible?  What is the "RA" at the end all about?  Is there a resource online that charts all the compatible ECU #s so I can broaden my search or do I have to stick to EXACTLY my code?

 

Thanks

Jason

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Proper mounting and proper grounding will go a long way. Zip-tied to the bottom of the glove box just doesn't cut it.

 

True that!  

Here's what I did.  It's actually in the engine bay and protected by a water-proof box.  Still, I'm super paranoid! :)

 

Putting the ECU in your Engine Bay:

http://westycamper.blogspot.com/2014/04/subaru-ecu-placement-rear-passenger.html

 

How to build an ECU box for a Vanagon:

http://westycamper.blogspot.com/p/ecu-box.html

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