94 accord ECU question
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From: Clemson, SC, USA
94 accord ECU question
I'm replacing the ECU on my brother's 94 Accord EX Coupe because the old one has crapped out apparently. The ECU that matches the VIN is the 37820-P0A-A01. My question is this... does it matter whether the donor ECU came from a MT or AT vehicle? My gut tells me no, since the VIN is associated with this part number on the ECU. However, I want to be sure before dropping ~$100 on a used ECU.
Thanks all!
Thanks all!
Honda-Tech Member
Joined: Jan 2004
Posts: 6,456
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From: New England, USA
Re: 94 accord ECU question
I'm replacing the ECU on my brother's 94 Accord EX Coupe because the old one has crapped out apparently. The ECU that matches the VIN is the 37820-P0A-A01. My question is this... does it matter whether the donor ECU came from a MT or AT vehicle? My gut tells me no, since the VIN is associated with this part number on the ECU. However, I want to be sure before dropping ~$100 on a used ECU.
Thanks all!
Thanks all!
P
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Junior Member
Joined: Aug 2002
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From: Clemson, SC, USA
Re: 94 accord ECU question
Example: http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT
Not saying you're wrong, just trying to understand.
Right... but I guess my question is/was... is the transmission (AT vs MT) inherent in the part number (37820-P0A-A01), as GhostAccord shows, or does that singular part number exist in both AT and MT vehicles, and some other denotation would separate the two?
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Joined: Mar 2007
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From: East Coast 506, Canada
Re: 94 accord ECU question
Why do I see some used ECUs labeled clearly as 37820-P0A-A01, which also clearly state they were removed from an accord with an automatic transmission? Are they just mistaken?
Example: http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT
Not saying you're wrong, just trying to understand.
Right... but I guess my question is/was... is the transmission (AT vs MT) inherent in the part number (37820-P0A-A01), as GhostAccord shows, or does that singular part number exist in both AT and MT vehicles, and some other denotation would separate the two?
Example: http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT
Not saying you're wrong, just trying to understand.
Right... but I guess my question is/was... is the transmission (AT vs MT) inherent in the part number (37820-P0A-A01), as GhostAccord shows, or does that singular part number exist in both AT and MT vehicles, and some other denotation would separate the two?
Here is the information from an online source that is probably a bit more credible than EBay.
Originally Posted by Hondata.com
All Honda ECUs have a part number which is located on the side of the ECU and inside the ECU on the connector. e.g. 37820-P0A-A01
The part number consists of three components:
* Honda's part number for ECU, which is always 37820
* Three characters (which are loosely related to the model of car/engine). e.g P0A
* Three characters (which are the revision of the ECU) e.g. A01 or A51
The middle three characters are the most useful to identify what the ECU is. Different generation ECUs may use the same characters. e.g. a P72 OBD I ECU is different from a P72 OBD II ECU. Here is a list of common ECUs:
The last 3 characters are broken down into 3 parts. "A" generally is used for US ECUs. "G" is European, and "J" is Japanese. There are other versions of this, but you get the idea. The second digit "0" typically means manual transmission, where a "5" means automatic transmission, and the last digit "1" is the version number.
The part number consists of three components:
* Honda's part number for ECU, which is always 37820
* Three characters (which are loosely related to the model of car/engine). e.g P0A
* Three characters (which are the revision of the ECU) e.g. A01 or A51
The middle three characters are the most useful to identify what the ECU is. Different generation ECUs may use the same characters. e.g. a P72 OBD I ECU is different from a P72 OBD II ECU. Here is a list of common ECUs:
The last 3 characters are broken down into 3 parts. "A" generally is used for US ECUs. "G" is European, and "J" is Japanese. There are other versions of this, but you get the idea. The second digit "0" typically means manual transmission, where a "5" means automatic transmission, and the last digit "1" is the version number.
Honda-Tech Member
Joined: Jan 2004
Posts: 6,456
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From: New England, USA
Re: 94 accord ECU question
Why do I see some used ECUs labeled clearly as 37820-P0A-A01, which also clearly state they were removed from an accord with an automatic transmission? Are they just mistaken?
Example: http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT
Not saying you're wrong, just trying to understand.
Right... but I guess my question is/was... is the transmission (AT vs MT) inherent in the part number (37820-P0A-A01), as GhostAccord shows, or does that singular part number exist in both AT and MT vehicles, and some other denotation would separate the two?
Example: http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT
Not saying you're wrong, just trying to understand.
Right... but I guess my question is/was... is the transmission (AT vs MT) inherent in the part number (37820-P0A-A01), as GhostAccord shows, or does that singular part number exist in both AT and MT vehicles, and some other denotation would separate the two?
These are generally issued thru yearly production runs where the manufacturer may change specifications, or suppliers.
The most definitive sourse for part number supersessions is two.
The OEM manufacturers Parts History Catalogs and Salvage Yard cross reference guides.
I believe the PN# for the (for example) '97 Accord L4 Auto Federal application has changed 4 times since 1998.
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