Car starter and alternator BMW 5 Series E28

General information about the charging system and precautions when working with it
There are two types of alternators available for these models: Bosch and Motorola. There are also three different current ratings: 65 amps, 80 amps and 90...

Checking the charging system
1. If there is a fault in the charging system, do not immediately conclude that the problem is in the generator. First of all, check the following: Check the...

Removal and installation the generator
If your vehicle's radio is equipped with an anti-theft system, make sure you know the correct activation code before disconnecting the battery. Refer to...

Replacing the voltage regulator
The voltage regulator controls the charging system by limiting the generator's output voltage. The regulator is a sealed unit and is not adjustable. If the...

Checking and replacing generator brushes
If your vehicle's radio has an anti-theft system, make sure you know the correct activation code before disconnecting the battery. Refer to Section 1 for...

General information about the engine starting system and precautions
The sole function of the starting system is to crank the engine at a sufficient speed to start the engine. The starting system consists of a battery, starter,...

Checking the starter on a car
Before diagnosing the starter, make sure the battery is fully charged. 1. If the starter does not turn at all when you turn the ignition key, make sure the...

Removal and installation the starter
If the starter is faulty, it should be replaced or sent to an auto electrician for repair. Major repairs to the starter at home are not practical, even if...

Removal and installation the traction relay
Removal If your car's radio is equipped with an anti-theft system, make sure you know the correct activation code before disconnecting the battery. Before...

Diagnostics of faults of the starting and charging system
Symptom Possible cause The battery does not hold a charge The alternator drive belt is worn out or its tension adjustment is not correct (see chapter Routine...

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