I hear only bad things about Bosch platinum plugs lately. The NGK's are OEM, and they work well.

BKUR6ET-10

Relatively cheap, copper plugs.

Ive used them since I got the car and have never had an issue with them.

I see BKUR6 ET10 listed for the 174hp.
Audi part# 101 000 033 AA

I see the Bosch F7LTCR (and the NGK BKUR6ET) listed for the 125hp and the 101hp engine (n/a in US)

I know I got the BKUR6 ET10 as OEM.

After hearing different things here, I've had a buddy in Germany ask around regarding the quality of Bosch plugs, and he said that he was told that Bosch plugs weren't good anymore. That's all I can say.

had this chronic slight, very subtle intermittent miss at idle that hasn't gone away in spite of many new ignition/idle/fuel related parts. Wouldn't be the first time wrong plugs had set me back a TON of unnecessary funds chasing the problem.

Spent over $3k once searching a fault with a BMW 2002Ti in the late 70's. Even the computer showed a burned/bent valve in one cylinder. Turned out to be a cracked insulator on one spark plug in that cylinder. Yep I bought a whole new built head (with exchange for mine) before finding out the problem was still there when we fired the car with new head up (we had transferred the plugs from the old head as they were brand new). My all time biggest diagnostic faux pas.

Let us know if the new plugs work better.

Better burn characteristics than the Bosch or NGK OEM three prong plugs which tended to foul-out easily.

The Beru have stayed pretty clean over 25,000 miles; thus, their heat index appears ideal for my engine--not too hot, not too cold, they are just right. :-) (Yeah, Yeah, so I read stories to my two year old). :-ppppppppppppp

I had a hell of a time with the dealer putting NGK two-prong plugs (intended for the 30v?) into my car. What a fricking mess! Decifering the NGK plug number revealed that the two-prongs lacked the same spark characteristics as the three-prong plugs; this resulted a surreal fouling condition. I went back to Bosch three prongs for a while (which slowly fouled and intermittantly misfired) and then upgraded to Beru Ultra-X's and never looked back.

I remain curious regarding the Denso's--please give your experiences with them if you pay attention to such details as their heat index compatibility.

Anyway, Denso IK22 is 1 step colder plug. IK20 is the factory standard. If you don't add any HP on your engine, IK20 is the way to go. I believe denso is very expensive $11/plug = $66/6 plug. IMO, it's worth the money.

Not really. I copied it to notepad. :-)