How to Replace The Alternator in a 2000 BMW 740

1. Disconnect the negative battery cable. Remove the air cleaner assembly using the screwdriver to remove the hose clamps.
2. Disconnect the electrical wires from the alternator using a wrench to remove the nuts. Unplug the voltage regulator harness from the alternator.
3. Release the belt tension by turning the adjusting bolt counter-clockwise with a socket and ratchet. Pull the belt off the alternator pulley.
4. Remove the alternator bolts using a socket and ratchet. Pull the alternator out of the BMW.
5. Put the new alternator in the car and tighten the mounting bolts using the socket and ratchet. Place the belt on the alternator pulley, and tighten it with the adjusting bolt by turning it clockwise with the socket and ratchet. Connect the electrical wires, and tighten the nuts with the wrench. Plug the voltage regulator harness into the alternator.
6. Place the air cleaner assembly on the BMW, and tighten the clamps with the screwdriver. Connect the battery cable, and tighten the nut with the wrench.