Alternator & Regulator: Overhaul: Brushes

Ensure brushes are longer than 0.198" (5 mm). Replace if necessary. Unsolder brushes from voltage regulator. Solder new brushes. Do not allow solder to run into strands of brush leads. Brushes must be free to slide in brush holder with normal spring tension of 10 - 14 ozs. (283 - 397 g).

Fig 1: Exploded View of Bosch Alternator (325 Series)

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Exploded View of Bosch Alternator (535i, 735i & 735iL)

Courtesy of BMW OF NORTH AMERICA, INC.