What is the construction and purpose of alternators and generators?

Alternators and generators are devices mounted to the engine, designed to generate electrical energy for the vehicle's needs. A typical unit consists of a housing, rotor, stator, diode bridge, voltage regulator, pulley, and electrical connectors. This component operates in the charging system and works with the battery and the car's onboard electrical installation.

What are alternators and generators used for?

Alternators and generators are used to power electrical consumers while the engine is running and to charge the battery. They are responsible for the stable voltage needed for the operation of lights, control units, heating, fans, and other electrical systems. When they operate incorrectly, voltage drops, starting problems, and equipment malfunctions may occur.

What role does the voltage regulator play?

The voltage regulator is a component that controls the alternator's operation and maintains the correct charging level in the electrical system. It limits excessive voltage spikes and stabilizes system operation during varying engine speeds. Depending on the design, it may be integrated with the alternator or appear as a replaceable element working with the brushes.

How to choose an alternator or generator for a specific car?

It is safest to compare the OEM part number, interchangeable numbers, fuel type, engine version, and mounting type. It is also worth checking the electrical connector, pulley diameter, and current output. If there are differences between equipment versions, verification by VIN is helpful.

What symptoms indicate problems with an alternator or generator?

Typical symptoms include a battery warning light, flickering lights, weak charging, and noise coming from the engine accessory area. In some cases, there are also problems with starting the car or unstable operation of electrical devices. During diagnostics, it is worth checking the charging voltage, belt condition, and electrical connections.

What should be checked before installing a used alternator?

Before installation, it is good to compare mounting points, the plug, the pulley, and part markings with the removed unit. You should also assess the condition of the housing, threads, connectors, and any signs of overheating. It is also important to check cooperating elements, such as the accessory belt or power cables.

Alternators and generators

At Global Parts, we offer a wide selection of original used car parts, including alternators and generators for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Our alternators and generators undergo quality control to ensure you receive a top-quality product.

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Alternator BMW F30 F32 N57N 330d 430d Diesel Engine Generator 230A Valeo 8509224

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Part no. 7542529-3

BMW E87 E90 E91 E60 E61 E63 N52 Alternator Generator 155A 7542529

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Part no. 7552815

BMW Z4 E89 23i 30i N52N Alternator Denso 170A 7552815

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Part no. 7792092

BMW X5 E53 3.0d Diesel M57 Alternator 150V 7792092

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Part no. 7551252

BMW X5 E53 3.0i Petrol M54 Alternator Valeo 140A 7551252

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Part no. 7532966-2

BMW E81 E87 E90 E91 LCI Alternator Generator Lucas 150A 7532966

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Part no. 7797521-1

BMW E60 E61 E63 E65 E83 Alternator Generator Lucas 170A LRA02319

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Part no. 7591532

BMW E82 E90 E91 E92 LCI Alternator Generator 170A 12V 7591532

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Part no. 7555926-3

BMW E60 LCI E82 E92 LCI Alternator Generator 12V 180A Bosch Petrol 0121715012

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Part no. 7501690

BMW 3 5 7 X5 Series E38 E39 E46 E53 Generator Alternator Bosch 120A 7501690

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Part no. 8654280

BMW X3 G01 X4 G02 G20 G21 G22 G26 G28 G30 Alternator Generator 14V 150A 8654280

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Part no. 7591268

BMW X3 F25 Alternator Generator 210A 28iX N52N 7591268

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Part no. 8645329-1

BMW F20 F21 F30 F31 LCI B38 B48 Alternator Generator Denso 14V 220A 8645329

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Part no. 7533270-2

BMW E90 E81 E87 E85 Alternator Generator 150A N45 N46 Petrol Engine 7533270

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Part no. 7508054

BMW X5 E53 4.4i 4.6is M62 Water Cooled Alternator Generator 150A

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Part no. 7616119

Alternator Generator BMW F10 F11 F20 F21 F30 F31 N55 Denso 14V 210A 7616119

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Part no. 8688838

High Voltage Inverter BMW i3 I01 Hybrid 60Ah Rex Electrical Machine Electronics

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Part no. 7533270

Alternator BMW E90 E81 E87 E85 Petrol Engine N45 N46 Alternator 150A 7533270

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Part no. 7789980-1

BMW E46 Alternator Generator Diesel Engine M47N M57N 150A Lucas LRA02891

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Part no. 7552815-1

Alternator BMW Z4 E89 23i 30i N52N Alternator Denso 170A 14V 7552815

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Part no. 8634166

Alternator BMW G20 G30 G14 B47 B48 B58 B46 Alternator 180A 14V 8634166

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Part no. 7543083-3

Alternator BMW E60 E61 E87 E90 E91 N52 Generator 155A Bosch LRA02970

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Part no. 7823344-2

BMW F20 F21 F30 F31 F32 N47N Diesel Alternator 175A 7823343 7823344

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Part no. 8509225

Alternator Generator BMW F30 F32 N57N Diesel Electrical Unit Denso 180A 8509225

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Part no. 7542529-1

BMW E87 E90 E91 E60 E61 E63 N52 Alternator Generator 155A 7542529

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Part no. 7606628

BMW F10 M5 F06 F12 F13 M6 S63N Engine Alternator Generator 14V 210A 7606628

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Part no. 7797661-1

Alternator BMW E53 E83 M57N2 Generator Diesel Engine Power 150A 7797661

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Part no. 8488548

High Voltage Inverter BMW i3 I01 Hybrid 120Ah Rex Electrical Machine 8488548

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Part no. 7801124

BMW X5 E70 Alternator Generator Engine Unit Valeo 220A 14V 7801124

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Part no. 7543083-1

BMW 1 3 5 E60 E61 E87 E90 E91 N52 WAI Alternator Generator 155A 11077N

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Part no. 7558220-1

BMW E82 E90 E91 E92 N54 135i 335i Alternator Generator 180A 7558220

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Part no. 7789980-2

BMW E46 M47N M57N Alternator Generator 150A Valeo 7789980

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Part no. 7797661-3

BMW X3 X5 E53 E83 M57N2 Alternator Generator Diesel Power 150A 7797661

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Part no. 7540992-2

Alternator Generator BMW X5 E53 E60 E61 E63 E65 N62 Petrol Engine 180A 7540992

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Part no. 8645325-1

BMW F20 F30 F32 F33 F34 B38 B48 Petrol Engine Alternator Generator 180A 8645325

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Part no. 8680374-1

BMW F45 Alternator Generator 14V 180A DENSO 8680374

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Part no. 7558220

BMW E82 E90 E91 E92 N54 135i 335i Alternator Generator 180A 7558220

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Part no. 8680374

BMW F45 Alternator Generator 8680374

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Part no. 7533837

BMW 5 6 7 E60 E61 E63 E65 N62 N62N Alternator Supporting Bracket Mount 7533837

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Part no. 8571358

Alternator BMW G11 G12 LCI G20 G21 G30 G31 Alternator 250A Bosch 8571358

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Part no. 7542529-2

BMW E87 E90 E91 E60 E61 E63 N52 Alternator Generator 155A 7542529

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Part no. 7555926-1

BMW E60 LCI E81 E90 E91 Petrol Alternator Generator Bosch 180A

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Part no. 7802927-1

BMW 1 3 E87 E90 E91 E92 M47N2 M57N2 Alternator Bosch Diesel 150A 0 986 080 580

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Part no. 7802929-1

BMW 5 7 E60 E61 E65 M57N M57N2 Compact Alternator Generator Valeo 170A 7802929

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Part no. 7550468-1

BMW 1 3 E81 E87 LCI E90 E91 N43 Alternator Generator 170A Petrol NAPA NAL1250

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Part no. 7807187

BMW F10 F11 X5 E70 Alternator Generator Unit Valeo 230A Diesel Engine 7807187

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