How to Identify a Honda ECU Number
- 1). Find the number, which will be printed on the side of the device on a label and will consist of 11 various digits and letters that identify what model car it belongs to.
- 2). Make sure the first five digits read "37820" as this is Honda's standard and will ensure it is a Honda ECU.
- 3). Check the middle three digits which identify the Honda's model. Consult an ECU list available online that identifies the models according to this middle number, which should always start with the letter "P" and end with two digits. Some examples include "PM5," which indicates a 1988-1991 Honda Civic or CRX while "P13" corresponds with a 1993-1995 Honda Prelude with a Vtec engine.
- 4). Identify the last three letters of the ECU number, which identify the country of origin and the type of transmission. For example, "A" means it is an American ECU, "G" means it's European and "J" means it's Japanese. A "0" in the number means it belongs to a manual transmission while "5" means it belongs to an automatic transmission.
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