Withdrawal
Caution: Disconnect the battery to avoid short circuit.
On models 518i, 520i, 525i: Disconnect the ground wire from the battery.
On models 530i, 535i, 524td, 525tds: Disconnect the battery terminal at the bulkhead connector.
Attention: When the battery is disconnected, the information in the electronic memory devices, such as the engine trouble memory or the radio security code memory, is erased. When disconnecting the battery, follow the instructions in section "Removing and installing the battery".
Disconnect the wires from the starter from terminal 30 (a thick wire going directly to the positive battery post) and terminals 50 (thin wire, from the ignition switch).
Remove two nuts 3 for starter. Torx wrench E14 is required to hold the bolts. If the nuts are hard to get to, remove the expansion tank and move aside the water hoses around the starter. In addition, there is a special curved key from HAZET for removing the starter.
Unscrew bolt 7 from the rear support of the starter and first move the starter forward and then pull it out.
Installation
The starter is installed in the reverse order. Don't forget to install the washers on the mounting bolts.
Secure the water hoses with new clamps.
If the coolant has drained, refill it into the engine.
Connect ground wire to battery or connector.