Just wanted to run this past everyone. The passenger seat has had issues from day one. Right now the seat back will recline and got forward. I think it will also raise and lower.

But the headrest does not work and if the seat base is told to go backwards, it will not. But it will go forwards.

When I take the module apart I can find the fault and fix it. Then it goes back, but only if I make it do so in small increments. If I hold the switch, it may go back for about a second, then stop. Then I get lots of smoke and the circuit board trace is melted.

Any clue where to start? Could it be the motor? Tracks are clean and lubricated.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car