What is the function of an alternator in a car?

An alternator is a device that converts mechanical energy from the engine's crankshaft into electrical current that powers the car's systems and charges the battery.

What is the difference between an alternator and a generator?

A generator is the general term for a device that produces electricity. An alternator is a specific type of AC generator used in cars.

What does the term "compact alternator" mean?

A compact alternator is reduced in size and weight while maintaining the same power output. It is often used in newer generation cars.

What are the symptoms of a faulty alternator?

The most common include: battery light on, flashing lights, bearing noise, and voltage drops.

Are used alternators a good choice?

Yes, alternators used from a reliable source are an economical and ecological solution that allows you to reduce operating costs.

How do I check if the alternator will fit my car?

It is best to use the VIN number or compare the OEM part number – this guarantees full compatibility.

How much current should a functioning alternator generate?

A standard alternator in a passenger car should maintain a voltage of 13.8–14.4 V at a current of up to 150 A.

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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Audi A6 C7 3.0 TDI CLAA Alternator Generator Engine Unit Hitachi 059903018R

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Alternator Mini Cooper S R52 R53 Petrol W11 Compact Generator 105A 7515030

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BMW X5 X6 E70 E71 M57N2 Alternator Generator 180A VALEO 7801173

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Citroen Relay III Alternator Generator Valeo 9805343480

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Alternator Motor BMW F20 F21 LCI B37 Diesel Engine Alternator 180A 8626086

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Alternator Motor BMW F20 F21 LCI B37 Diesel Engine Alternator 180A 8626086

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BMW F20 Alternator Engine Alternator Generator Denso 170A Petrol N55 7639661

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

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Audi A4 B8 3.2 FSI Alternator Generator 06E903016S

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BMW 5 Series F10 F11 LCI B47 Cable Alternator Starter 8573116

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Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A A0009063822

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Vauxhall Corsa D 1.3 CDTi Alternator Generator Electrical Unit 101210-0961

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Volkswagen Golf 5 Audi A3 8P 1.9 2.0 TDI Engine Alternator Generator 06F903023F

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Alternator Mercedes W204 W212 Diesel Engine OM651 Valeo 180A A0009067900

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BMW E60N E61N E81 E87N E88 E90 E91 E92 E93 Alternator 7550469

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Audi A4 B8 A5 8F 2.0 TDI Diesel Engine Alternator Generator 04L903017D

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Audi A3 8V 2.0 TDI CRLB Diesel Alternator 03F903023D

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Audi A4 B8 Avant 2.0 TDI Quattro Alternator Generator 03L903017

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Alternator Mercedes W176 C117 X156 X117 Petrol Engine Generator A0009060803

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Mercedes W203 W204 M271 Engine Alternator Generator Valeo 120A 14V A2711541402

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Mercedes C118 W177 W247 Three Phase Alternator A0009062609

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Audi A1 8X 1.2 TFSI CBZA Petrol Engine Alternator Generator 04C903023L

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BMW E46 N42 316i 318i Petrol Engine Alternator Generator Remy 7521382

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Mini R55 R56 R57 LCI N12 N14 N16 N18 Engine Alternator Generator Petrol 120A

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BMW 3 Series E90 E91 E92 M3 Engine Alternator Generator Valeo 180A 7838656

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

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BMW 3 5 7 X3 Series E46 E60 E65 E83 M54 Alternator Generator 7541694 155A BOSCH

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Mini Cooper R56 N12 W16 Alternator Generator Napa 7575650

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Ford Focus Mondeo Diesel Engine Alternator Generator Engine Unit 6G9N-10300-UD

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Mercedes W205 W213 Engine Alternator Generator M264 Petrol A0009067703

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BMW E81 E90 E91 E60 Petrol Alternator Generator 150A 7550967

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VW Seat Skoda Polo MK5 Diesel Engine Alternator Generator 140A 14V 03P903023D

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Audi A4 B7 Petrol Engine Alternator Generator Electric Unit 14V 140A 06B903016AB

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Audi A7 S7 4G 4.0 TFSI Petrol Engine Alternator Generator 079903015P

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Peugeot 206 Engine Alternator Generator 1638095180

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

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Audi A3 S3 8Y Engine Alternator Generator Electric Unit 14V 140A 06K903026C

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Chrysler Voyager 2.8 CRD ENR Engine Alternator Generator 4868429AD

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BMW 3 5 7 X5 E38 E39 E46 E53 M54 Engine Generator Alternator 120A

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Alternator BMW X5 E70 X6 E71 M57N2 Generator 170A 170AMP 14V VALEO 7796125

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Renault Trafic Vauxhall Vivaro 2.0 DCI Diesel Alternator Generator 231001423R

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Alternator Mercedes W212 Engine Generator 220A Valeo A0009063522

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

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Audi Q2 GA Diesel Engine Alternator Generator Assembly Bosch 04L903024T

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Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A A0009063822

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Ford Transit Mk7 Diesel Engine Alternator Generator Unit 6C1T-10300-CD

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Engine Alternator BMW F20 F21 F30 LCI Generator Lucas 170A N13 Petrol 7605060

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BMW E60 E81 E90 E91 Petrol Alternator Generator 180A 7555926

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BMW E46 M47N M57N Alternator Generator 150A Valeo 7789980

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Mini R55 R56 R57 LCI Alternator Generator Diesel 150A 7823291

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Mini Cooper R55 R56 R57 R58 Petrol Engine Alternator Generator 7576921

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Alternator Generator Peugeot 208 308 Partner Diesel 12V 9678048880

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Mercedes Sprinter W906 OM646 Engine Diesel Alternator Generator A6461540002

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Ford Transit Mk7 2.2 TDCi Diesel Engine Alternator Generator Unit CC1T-10300-BC

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Volkswagen Golf Mk5 2.0 TFSI Petrol Alternator Generator 06F903023HX

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

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Volkswagen Golf Sportsvan 1.5 TSI Alternator Valeo 14V 140A 04C903021A

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Mercedes W213 C238 Petrol Alternator Generator A0009060205

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BMW F20 F21 F30 F31 LCI F32 F33 F34 Alternator Generator Unit 14V 190A 8645326

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Battery Cable VW Polo 6R Positive Alternator Starter Wiring B+ 6R0971349Q

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Renault Trafic II Vauxhall Vivaro A 2.0 DCI Alternator Generator 8200404459D

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BMW E90 E91 E92 E93 LCI Diesel N57 Alternator 150A 7808073 7805432

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Jaguar XF250 3.0 306DT AJV6D Engine Alternator Generator 8X2310300CB

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VW Volkswagen Polo 9N 1.4 TDI Alternator Bracket Mount Carrier 045903143E

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Seat Ibiza Volkswagen Polo Mk5 6R 1.2 Petrol Alternator Generator 03D903025J

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

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Alternator BMW F20 F21 F30 F31 LCI F32 F33 F34 Petrol Engine Unit 180A 8645325

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Alternator BMW F20 LCI Mini F30 F56 F60 Alternator Generator DENSO 150A

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Audi SQ5 8R 3.0 TDI CGQB Diesel Engine Alternator Generator 059903018Q

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Alternator Generator Mercedes W204 W207 Petrol Engine Bosch 150A A0009062003

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Alternator Mini R55 R56 R57 R57 R58 LCI Generator Petrol 7574365

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Alternator Mercedes W204 W207 OM651 14V 150A Engine Start/Stop A0009060401

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Alternator Generator Mercedes W211 S211 OM646 Diesel Engine 200A A0131545902

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Audi A4 B8 2.0 TDI Alternator Generator 03G903016G

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Renault Trafic II Opel Vivaro A 2.0 DCI Alternator Generator 8200404459

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Mercedes W164 W204 W211 OM642 Diesel Alternator Generator A6421540402

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Showing 100-198 of 455 products

Efficient alternators and generators – reliable power source for your vehicle

A wide range of alternators and generators – tailored to various car models

Alternators and generators are key components of a vehicle's electrical system, responsible for generating the electricity needed to power all vehicle systems and charge the battery. Their proper operation ensures voltage stability, the reliability of electrical devices, and the comfort of vehicle operation. At the Global Parts automotive store , you'll find a wide selection of used car parts , including alternators and generators, perfectly matched to brands such as BMW , Audi , and more. Mercedes , Volkswagen , Mini and others.

Types of alternators and generators

Alternators are divided into classic and compact types. Compact alternators are smaller, lighter, and often used in modern cars, where space and weight reduction are key. Generators used in heavier vehicles, such as delivery vans or off-road vehicles, are more powerful to meet higher energy demands. Typical alternator output in passenger cars is between 70 and 150 amps, while in heavy-duty vehicles, it can reach up to 200 and 300 amps .

What functions do alternators and generators perform?

Alternators and generators play a key role in the functioning of a vehicle's electrical system:

Generating Electricity – Converts mechanical energy into electrical energy that powers all vehicle systems.
Battery Charging – Provides a constant supply of power, keeping the battery fully charged.
Voltage regulation – Built-in voltage regulators maintain stable voltage, protecting electrical devices from damage.
Support for electrical systems – They power lighting, air conditioning, radios and other devices, ensuring their uninterrupted operation.

Table – typical symptoms and parameters of alternators

Symptom	Possible cause	Technical parameter
Poor battery charging	Worn out voltage regulator	Operating voltage: 13.8–14.4 V
Squeaking noises when the engine is running	Damaged drive belt	Power consumption: 1.5–2.5 kW
Flickering lights	Incorrect voltage stabilization	Current: 90–150 A (passenger)
No charging	Rotor or diode bridge failure	Power: 1.2–3.0 kW

Why is it worth taking care of alternators and generators ?

A damaged or malfunctioning alternator or generator can lead to power issues and shorten the life of the battery. Typical symptoms include:

Discharged battery – May be due to faulty charging.
Battery light on dashboard – Indicates problems with the alternator or generator.
Unusual noises – Squeaks or grinding sounds may indicate worn bearings or drive belt.
Voltage fluctuations – May indicate problems with the voltage regulator. If you need a replacement, you'll find the right used car parts at Global Parts that will restore the full functionality of your electrical system.

How to choose the right alternators and generators ?

When choosing alternators and generators, there are several key aspects to consider:

Vehicle-specific fit – Every electrical system has its own specific technical requirements. At Global Parts, you'll find alternators and generators perfectly matched to BMW, Audi, Mercedes, Volkswagen, Mini , and more .
Technical condition – Used alternators and generators should be fully functional, free from mechanical and electrical damage.
Type and Capacity – Make sure the alternator or generator you choose has the correct power and voltage to meet your vehicle’s requirements.

Compatibility and fit

When choosing an alternator, it's important to match not only the vehicle brand but also the specific engine version. For example, the alternator in a BMW 320d (E90) differs in parameters from the alternator in a BMW 318i (E46), even though both models belong to the same 3 Series. Therefore, filtering parts catalogs by VIN or OEM specification is crucial. This ensures compatibility with the vehicle's electrical system and avoids installation issues.

Why choose used alternators and generators ?

Used car parts, such as used alternators and generators, are an economical solution that allows you to save money while maintaining high quality. By choosing used electrical components, you benefit from:

Lower costs – Used alternators and generators are much cheaper than new ones, but offer just as high quality.
Ecology – Recycling parts supports environmental protection and reduces waste.
A wide range of products – In our store you will find used alternators and generators to the most popular car brands.

How to take care of alternators and generators ?

To ensure that alternators and generators operate reliably for a long time, it is worth following a few rules:

Regular inspections – Check the condition of the alternator and generator during technical inspections.
Maintain your drive belt – Make sure the belt is properly tensioned and shows no signs of wear.
Cleaning and maintenance – Regularly remove dirt and check the condition of electrical connections.
Avoid overloads – Too many electrical devices connected at once can overload the system. If you need a replacement, you will find the right car parts at Global Parts that will ensure the durability and efficiency of your electrical system.

FAQ - Frequently asked questions about alternators and generators

Question	Answer
What is the function of an alternator in a car?	An alternator is a device that converts mechanical energy from the engine's crankshaft into electrical current that powers the car's systems and charges the battery.
What is the difference between an alternator and a generator?	A generator is the general term for a device that produces electricity. An alternator is a specific type of AC generator used in cars.
What does the term "compact alternator" mean?	A compact alternator is reduced in size and weight while maintaining the same power output. It is often used in newer generation cars.
What are the symptoms of a faulty alternator?	The most common include: battery light on, flashing lights, bearing noise, and voltage drops.
Are used alternators a good choice?	Yes, alternators used from a reliable source are an economical and ecological solution that allows you to reduce operating costs.
How do I check if the alternator will fit my car?	It is best to use the VIN number or compare the OEM part number – this guarantees full compatibility.
How much current should a functioning alternator generate?	A standard alternator in a passenger car should maintain a voltage of 13.8–14.4 V at a current of up to 150 A.

Summary: Alternators and Generators at Global Parts Automotive Store

Alternators and generators are essential components of the electrical system, ensuring reliable power and the proper operation of all vehicle systems. By maintaining their technical condition, you can avoid power problems and extend the life of the entire electrical system. The Global Parts automotive store invites you to browse our wide selection of original used car parts . Whether you're looking for car parts for BMW , Audi , Volkswagen , Mercedes, Mini , and more, you'll find them at competitive prices. We strive to ensure every customer finds the right parts for their car, and if you have any questions or concerns about selecting the right components, we're happy to help! Please contact us – we're here to help! For more information and interesting facts, visit our automotive blog .

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