hi all,ive decided to fit a new egr valve to my car,instead of giving the old one a clean,any info would help,

I was told you have to programme this to the car,is this true or is it just a direct replacement? i've heard from an audi technician mechanical ones dont need to be programmed to my car as chassis is 8E2,AND THIS IS A MECHANICAL ONE

How can i tell the difference from a mechanical and an electronic one?

ARE THEY EASY TO REPLACE?

A4 TDI (B6) 2001 AWX ENGINE.