Power electrical devices BMW 5 Series E39

Removal and installation the battery
The battery is located in the luggage compartment behind the right side trim. Caution: If the battery is disconnected, the contents of the fault code memory...

Instructions for handling maintenance-free batteries
BMW 5 Series vehicles are equipped with a maintenance-free battery. These batteries no longer require distilled water as part of maintenance, but some...

Checking the battery
Checking the electrolyte level The electrolyte level in each element should be between the MIN mark "1" and the MAX mark "2". Otherwise, unscrew the plugs "3"...

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

Charging the battery
For a maintenance-free battery, the items marked with a list symbol do not need to be performed. BMW vehicles are equipped with such batteries as standard. The...

Diagnosing battery problems

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

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

Checking the generator voltage
Connect a voltmeter between the positive and negative terminals of the battery. Start the engine. When starting the engine, the battery voltage may drop to 8...

Removal and installation the generator
Removal Disconnect the negative (-) battery cable. The battery is located in the luggage compartment behind the right side trim. Caution: This will erase the...

Replacement / check of generator brushes / voltage regulator
Removal the BOSCH generator Remove the poly V-belt "1" and generator "2". Unscrew 3 screws "6" securing the protective cover "5" of the generator. Unscrew the...

Generator fault diagnostics

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 start, the starter must spin the engine...

Bosch starter device
1 - collector body 2 - brush holder 3 - set of brushes 4 - metal ceramic bushing 5 - capsule 6 - excitation winding 7 - traction relay 8 - metal ceramic...

Removal and installation the starter
The starter is located on the side at the junction of the engine crankcase and gearbox and is removed by moving it downwards. Removal Disconnect the negative...

Checking/removing and installing the traction relay
If the traction relay is defective, the starter pinion does not extend to the flywheel ring gear, and the starter cannot turn the engine crankshaft. This...

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

This section is available on russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian

Similar sections for other types of BMW cars:
Electrical equipment: Power devices BMW 3 Series E36 (1990-2000)

Share information: