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-P72-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 P72
* Three characters (which are the revision of the ECU) e.g. A01 or G52

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.


* PG7 : 86-89 Integra (86-87 vac advance, 88-89 electronic advance)
* PM5 : 88-91 Civic/CRX DX
* PM6 : 88-91 Civic/CRX SOHC Si
* PM7 : 89-91 DOHC ZC (JDM 'ED' ECU)
* PM8 : 88-91 CRX HF
* PR2 : 89-91 ZC (Euro)
* PR3 : 89-91 JDM B16A EF8/9
* PR3 -J00 or J51 : 92 JDM Integra B16A EF8/9
* PW0 : 89-91 JDM B16A EF8/9 DA6-XSi
* PR4 : 90-91 Integra LS/GS
* PS9 : 88-91 4 door Civic EX Auto
* P05 : 92-95 OBD-1 Civic CX
* P06 : 92-95 OBD-1 Civic DX
* P07 : 92-95 OBD-1 Civic VX
* P08 : 92-95 OBD-1 Civic D15 JDM
* P0A : 94-95 OBD-1 Accord EX
* P13 : 93-95 OBD-1 Prelude Vtec
* P14 : 93-95 OBD-1 Prelude Si (non Vtec)
* P27 : 92-95 OBD-1 EG JDM Civic 1600 sohc
* P28 : 92-95 OBD-1 Civic Si/Ex
* P30 : 92-95 OBD-1 DelSol DOHC Vtec Si/EG SiR
* P54-G31 : 1997 Honda Accord 1.8 LS
* P61 : 92-93 OBD-1 Integra GSR
* P72 : 94-95 OBD-1 Integra GSR
* P72 : 96-00 OBD-2 Integra GSR
* P73 : 96-00 OBD-2 Integra Type-R (JDM & USDM)
* P74/75: 92-95 OBD-1 Integra LS/GS
* P75 : 96-00 OBD-2 Integra LS/GS
* P2N : 96+ OBD-2 Civic HX Coupe
* P2P : 96+ OBD-2 Civic EX Coupe
* P2E : 96+ OBD-2 Civic DX Coupe
* P2M : 96+ OBD-2 NZ Civic SOHC VTEC
* P2T : 99+ OBD-? Civic Si Coupe
* P5P : 97-00 OBD-2 Prelude Type-S (JDM ECU)
* PBA : 97+ US Acura 1.6EL
* PCT : 98+ JDM ITR / CTR
* PCX : 99+ OBD-? S2000

ECU ROM Numbers

good info

mine is a Civic 2000 EXi (D15Z4 Engine) Automatic from Japan... does this mean my ECU is P2P : 96+ OBD-2 ????

My civic is really bad in fuel economy.. i did tune ups, oil change, plugs...etc.. and finally got it hooked up to the computer & tested it @ the agent. they found that the ECU was faulty since the Injectors are opened for way too long ( 3.4 to 3.7ms instead of 2.7 to 2.9ms) when idling and that's why the bad fuel efficiency.

and i did some research and found that the ECU in this model cannot be re-programmed so i have to replace it......

Any tips on what to check when i go to buy the other ECU would be appreciated very much since i will be looking for a used ECU