We have the proper BMW special tool to reset the lights on the 20 pin round, and we go through the cluster on the others. (except the newer cbs cars) But when some lazy tech doesn't put the reset tool back for half a day I use the wire jump method rather than search around the shop for 30 minutes. It works the same really, what do you think the tool is doing internally when you hit the button?

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X5 pics

RIP 4.6is.....

2003 4.6is