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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

I'm not sure what the 2 digit codes are. There are lots of them though!

 

Just look for an ECU for the same year model and engine. The part numbers and codes aren't big factors.

  • Author

Thanks, Fairtax4me.

 

Just reporting back in... I did indeed end up getting the ECU mentioned despite the different codes.  It worked perfectly. 

why do you need an ECU?

 

my guess is it will sit on the shelf as a ''back up'' for a long time.

they do not fail often,

unless you like to take your car swimming.

Edited by johnceggleston

  • Author

In the Subaru/Vanagon conversion world, I've heard a lot of ECUs fail.  Something about the conversion.  I mean.. I'm making a VW van talk to a Subaru ECU...  not standard stuff.

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

  • Author

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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