4651711-2 64490 3.

I found this part number: P04606123

I've also found this part number on ECU's with for example 4651711-2 64490 5.

What does the last digit indicate? Will both work in the car?

Thanks for answers.

 

P04606123 that is the only part number you need to worry about the other number s are not anything that will make any difference.