I posted this in the MK V forum, but thought the 2.5 engine forum was more appropriate.
My son's 2005.5 Jetta with a the 2.5 liter BGP engine recently had its timing chain slip, trashing the valves. This is a problem with the BGP engine. The later 2.5 liter engine, the CBUA, was engineered to prevent this major failure.
I just installed a CBUA from a 2011 Jetta, totaled with only 860 miles on it. Yes, 860, under 1000. The staff at the salvage yard where I bought the "new" engine from could not guarantee the swap would be successful because their information stated, "Must use same engine code" when replacing a BGP engine.
When starting this project I thought it would work, but had some doubts. I now know; it works flawlessly (not even a check engine light) and would like to share my experience. Rather than go through the entire swap story again, here is a link to a thread that covers what I did. I also can answer any questions you may have concerning this swap. Take a look here: