Hi Bob
I think you are referring to the early 2006 redesign, p/n 161 476 949 99.
Earlier this year a revised part was introduced, p/n 161 477 198 44. At this time many dealers were temporarily out of stock of either part and bikes were off the road for up to two weeks.
Ever optimistic, I am hoping this new part might be an improvement

or even a total fix

so I took the panel off my GSA to check which version I have on my bike which was mended, I think, in June. But the only number stamped on the FPC is 7694378, so I'm no wiser.
Tim