Charging and starting systems BMW 3 Series E46

General information about the charge and start system
All vehicles covered in this manual have a 12V electrical system. The ground connection is through the negative battery terminal. The battery is located in the...

Battery — basic information and care
The installed 12V battery consists of six jars containing positive and negative plates, which are dipped in a sulfuric acid solution. The task of the battery...

Removing and installing the battery
The battery is located in the luggage compartment behind the cover on the right side. For vehicles 316i, 318i, the battery is located in the engine...

Checking the battery
Built-in battery indicator The indicator is green - The battery has a sufficient degree of charge. The indicator is black - The battery needs to be charged....

Generator. General information and security measures
Before doing any work on the charging system, you should familiarize yourself with the following safety precautions: 1. Never disconnect the battery or voltage...

Removal and installation of the generator
The car has an alternator. The generator is driven from the crankshaft through a V-belt. Depending on the vehicle model and equipment, generators of various...

Checking and replacing the brushes of the generator / voltage regulator
Withdrawal 1. Disconnect the negative cable (-) battery with the ignition off. The battery is located in the luggage compartment behind the cover on the right...

Removal, installation and check of a starter
Starter elements 1 - starter 2 - electromagnetic starter 3 - gear with overrunning clutch 4 - gear lever 5 - rotor 7 - brush holder 8 - bushings Starter check...

Removal, installation and check of the traction relay of a starter
If the traction relay is damaged, its gear does not engage with the flywheel ring gear. As a result, the starter cannot crank the engine. This defect appears...