My Passat has taken up smoking - but only sometimes

[Sallycycles]

Hi. I have a Passat B6 2.0 tai that has started smoking after deceleration/coasting and then accelerating. It doesn't always do it, and it can go for weeks without. It is always accompanied by an exhaust smell in the car. HELP!

[Lucas_R]

Blue smoke? Black smoke? White smoke? etc etc.

I assume you mean its a 2.0 TSI in which case it might be a faulty PCV. Part number is 06H-103-495 I believe but best to check the part number on your current PCV and match it.

Or do you mean TDI?