Well, I am going to pull a 180 and go against everything I have said in this thread as well as many other spark plug threads. I pulled the orignial plugs on my 02 4.4i with 122,000 miles this weekend. I figured they would be Bosch, but they were NGK BKR6EQUP with the BMW logo. I went down to Autozone with an old plug, looked at their NGK BKR6EQUP and the numbers were in the same place and matched exactly. The housing was the same shape as well, so I figured I would give them a shot seeing as they were $6.99 each (55.92 total for 8).

The old plugs came out very easily, which was surpring seeing as they had been in for 9 years and 122,000 miles and they were in much better shape than I anticipated. They didn't really look that bad. To be honest, even changing these out for the first time at 122,000 miles, I have not noticed any "restored power" from the new plugs.

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Profeshenal spellar