Power electrical devices BMW 5 Series E39

Removing and installing the battery
The battery is located in the luggage compartment behind the right side trim. Attention: If the battery is disconnected, the contents of the fault code...

Maintenance free battery instructions
BMW 5 Series vehicles are equipped with a maintenance-free battery. These batteries no longer need to be topped up with distilled water as part of maintenance,...

Checking the battery
Checking the electrolyte level The electrolyte level in each cell must be between the MIN·mark -1- and the MAX mark -2-. Otherwise, unscrew the plugs -3- of...

Spontaneous battery discharge
Depending on the version of the vehicle, the natural spontaneous discharge of the battery is supplemented by a discharge due to the current consumption of...

Charging the battery
For a battery that does not require constant maintenance, items marked with a list symbol do not need to be carried out. BMW vehicles are equipped as standard...

Generator — general information and device
The BMW 5 Series is equipped with an alternator. Depending on the model and version, generators with a nominal current of 80 A to 140 A can be installed. The...

Safety precautions when working with an alternator
Do not interchange the wires of the relay-regulator and the generator. Before disconnecting the wires, mark them with adhesive tape. Do not disconnect the...

Alternator voltage test
Connect a voltmeter between the positive and negative poles of the battery. Start the engine. When starting the engine, the battery voltage may drop to V volts...

Removal and installation of the generator
Withdrawal Disconnect ground wire (-) battery. The battery is located in the luggage compartment behind the right side trim. Attention: This erases the...

Replacing / checking the brushes of the generator / relay-regulator
Removing the BOSCH generator Remove poly V-belt -1- and alternator -2-. Unscrew the 3 screws -6- securing the protective cover -5- of the alternator. Unscrew...

Starter — general information
A small electric motor called a starter is used to start an internal combustion engine. In order for the car engine to be started, the starter must spin the...

Bosch starter device
1 - collector housing 2 - brush holder 3 - set of brushes 4 - metaploceramic sleeve 5 - capsule 6 - excitation winding 7 - traction relay 8 - metaploceramic...

Removal and installation of a starter
The starter is located on the side at the junction of the crankcase with the gearbox and is removed downward. Withdrawal Disconnect ground wire (-) battery....

Check / removal and installation of the traction relay
If the traction relay is defective, the starter gear does not extend to the flywheel ring gear, and the starter cannot turn the engine crankshaft. This defect...

Starter Troubleshooting
When the starter does not rotate, first of all it is necessary to check whether the voltage necessary for the day of its operation is supplied to terminal 50...