Hi,
I'm wrinting from Europe.
Need my engine to be replaced - said the mechanic.
Does any 04-08 J32A3 engine fit?
I've checked out engines on ebay and theres something I don't understand about 6th digit VIN ???

Example:
04 05 06 Acura TL Engine 3 2L 6 Cyl Vin 6 6th Digit | eBay

How do I know if a specific engine wil fit my car?

 

it will depend on the cost of "this engine", would it be cheaper to buy another vehicle?

 

Definitely not '07-'08. The manual states '04-'06, but with the different heads in '06, I'd stick with the '04-'05.
Maybe someone with more knowledge will supply a comment.

Guess the 6th digit should be a 6=3.2 engine, 7 would be a 3.5

 

I didn't know they changed the heads in '06. Do you know what the major changes were?

To the OP, maybe we should start with your symptoms, why does the mechanic think you need a new engine?