I just changed mine because my tech read the value which stated that the oil was ready to be changed. He said a sensor measures the resistance of the oil to determine when it needs changed, but it doesn't clear when you put in new oil. He also said most dealerships don't check that computer at inspections unless you ask. I watched him reset the value after I changed it.

__________________
2004 X5 3.0 MT, custom exhaust, AFE intake, Shark Injector, Towing Package, 100K miles

www.teamverploegen.com