Which is the strongest of the two? Wheres the code so i can find out which one i have? Thanks.
If your talking about blocks, both AXX &BWA they both have the sane block.
Vw changed from AXX to BWA around 2006 IIRC.
AXX had forged pistons, not sure if they are any stronger though. Either way, they can handle about 360bhp before breaking rods & piston rings
Code is on the left side of the engine (cam belt cover)