Belt. I have heard of new systems using electrical PS especially as it relates to the new 48V systems we will supposedly see some day, but I am unaware of any that have this yet. If anyone has any info on this I am interested to hear it. I imagine once electrical PS is implemented it will be "direct drive" and their will be no more pump and fluid which will be a good thing I think. All cars currently have belt driven pumps as far as I know.

My fluid level needed to be a little high, as I mentioned, to stop groaning. Does your groan all the time or just when you turn?

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra