Vehicle starting and charging system BMW 3 Series E46

Technical data
System type - 12 volts, minus on ground Generator Voltage (at 1500 rpm, all consumers off) - 13.5-14.2 V Starter Shaft power - 1.4 kW

Connection tightening torques, N·m
Generator to crankcase (N42 engine) — 21 Front booster bolts 1: 1st step - 59 2nd step - Tighten 90° Bolts of fastening of an arm of a starter to the engine —...

General information and precautions
General information The electrical system of the engine consists mainly of systems for starting and recharging the battery. Because. that the functions of...

Troubleshooting in electrical circuits — general information
See chapter 12 .

Battery — checking and charging
Note. The information below should be considered as a guide only. When using the battery, follow the manufacturer's instructions. 1. When leaving the factory,...

Battery — removal and installation
Note 1. If the BEU memory contains fault codes, then when the battery is disconnected, they will be lost. Therefore, before disconnecting the battery, check...

Battery Charging System — Check
Note. Before you begin, read the caution in section "Safety first!" at the beginning of the Guide and at the beginning of this chapter. 1. If the battery...

Generator belt — removal, installation and tension
See Accessory Drive Belt in chapter 1 .

Generator — removal and installation
4-cylinder engines Removal - M43TU engine 1. Disconnect the negative cable from the battery ( see paragraph 4 ). 2. Remove the air cleaner and air flow sensor...

Generator — check and repair
If the alternator is in doubt, remove it from the vehicle and have it checked and repaired by an auto electrician. Most electricians can change alternator...

Engine starting system — check
Comment. Please read the warnings in section "Safety first!" and in paragraph 1 of this chapter. 1. If the starter does not work when the ignition key is...

Starter — removal and installation
M43TU engine Withdrawal 1. Disconnect the negative cable from the battery ( see paragraph 4 ). 2. Apply the parking brake, raise the front of the vehicle and...

Starter — check and repair
If the starter is suspected to be defective, remove it from the vehicle and have it checked and repaired by an auto electrician. Most electricians can change...

Ignition lock — removal and installation
The ignition lock is made as a single unit with the steering column lock. The procedure for removing the lock is described in chapter 10 .