Under your "What's bad" section, there is a reference to

"Very useful information from FBE659 in The Backroom: The best PD units are mid-period 1.9s with solenoid injectors. Avoid the later piezo injector engines and avoid the 2.0 PD at all costs because of the likelihood of oil pump drive failure - especially in N-S installations. The earliest PD engines had a rather complex and flaky fuel cooling system which is also better avoided.

The best vintage PD is probably an '04 1.9 130 (AWX) - the 150 HP units are not as reliable and don't actually go much better."

So is the 2006 Leon 1.9TDi engine one of the better ones as mentioned above please? I appreciate it's noisy, etc. but just want to buy the most reliable version.