Did you happen to check the tightness/grip of the female terminal ends of the harness at the FSR?The heat generated at the resistor block causes the terminals to loose their tension after a while.I've seen the wires actually melted there.Could be as simple as a bad connection.That's all mine was on my 02 X5.

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If I'd of known it would last this long I'd of taken better care of it

Chris