no, but it will it would idle like a pig, and if you have dsg, when sat stationary in D, you'd feel it vibrate due to the idle speed being too slow on idle.
I changed mine, and found it idle'd better sat stationary, ie at the lights with my foot on the brake. Normally you can feel if its in Gear, but after i replaced my PCV, i had a job to tell what gear i was in!.
Its only £35 quid. Takes less then 10 minutes to fit, and if yours is the origonal, proberly worth you changing it. Have a look at your service receipts if i were you.