ECM/ECU Part Numbers and Replacement - Nissan Forum
A33 2000-2003 Chassis 2000-2003 Maxima

 
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post #1 of 8 Old May 17th, 2009, 02:34 PM Thread Starter
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ECM/ECU Part Numbers and Replacement

Here is what I hope is a fairly straight foward question:

When replacing the ECM/ECU, with a used one, do you need to get the exact part # (i.e. A56-XXX-XXX) or will any ECM/ECU from the same model/year car do?

So, if I pulled an ECM/ECU from another 2001 Maxima w/o traction control, would it work or would I have to match the A56 # exactly?

I have seen conflicting answers on various sites, so I was hoping I could get a conclusive answer to this question.

Any help would be appreciated guys.

Thank you.

Last edited by NissanNewb; May 17th, 2009 at 04:06 PM.
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post #2 of 8 Old Sep 21st, 2009, 10:46 PM
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You will need the exact part number. I am sure about this as i had to buy an ECM for my 99 GLE recently and i had to provide the part #
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post #3 of 8 Old Nov 9th, 2009, 04:25 PM
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ECU/ECM Problems 2001 Maxima w/ TCS

My question is, if I replace the ECM would there be any other problems. My current ECM board has two burn out marks on it. What if i replaced it w/ a new ECM w/o programming it to my car will my car start or is there other sensors such as the IACV-AAC Valve and the Throttle sensor that needs to be changed. I want the least expensive fix. I was thinking about having my original rebuilt.

Can someone w/ knowledge enlighten me. thanks.
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post #4 of 8 Old Nov 9th, 2009, 04:56 PM
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As long as the ECU came from the same trim level and transmission type then you should be ok. The only obstacle I can see would be the immobilizer system that goes with the chip in your key. They will have to be programmed by someone with a Consult II device.
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post #5 of 8 Old Nov 9th, 2009, 05:23 PM
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So would it be better to try to get the ECM that came out of my car repaired by a specialist. The ones that I came across said the IACV-AAC valve (what does this mean) & the Throttle Posistion Sensor (TPS).


I know if I did buy a ECM/ECU new or remanufactured from somewhere else it would have to be flashed by a Nissan dealer, right. So with that, I would have to make sure I have the right manufacturer date from my car.
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post #6 of 8 Old Nov 9th, 2009, 06:02 PM
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You can try to have yours repaired, if you know someone that can do it.
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post #7 of 8 Old Nov 9th, 2009, 07:53 PM
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I bought a used ECM for my 99 Maxima. I was given to understand that reprogramming was needed to make it work. However, i ended up not needing this as there was no problem with my original ECM. I still have the part and so let me know if you want it - you could save some money.
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post #8 of 8 Old Nov 9th, 2009, 07:58 PM
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99 ECU is different from the 2001 ECU.
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