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Alternator for my car

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The best-selling replacement parts from the Alternator section. We have a large selection of spare parts from different brands for Alternator and further low-price offers in our range of parts

-37%
RIDEX 4G0089 car Alternator cost

Evaluation

M.L. 25.04.2024

nobody seems to have this part, I tried locally we had a man in a workshop in Ramsgate who would repair the old alternator, but that was then and this is now, very pleased autodoc where able to help me thank you

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Parts Details
  • Alternator Charge Current [A]: 70
  • Pulleys: with multi-belt pulley
  • Voltage [V]: 12, 14
  • Number of grooves: 4
  • RIDEX: Alternator
  • Item number: 4G0089
  • Our price: £ 88,46
  • Condition: New
Details
RIDEX 4G0089 Alternator
Article number: 4G0089
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 141,97
£ 88,46
(Price per item)
price incl. 20% VAT, excl. delivery costs
-36%
RIDEX 4G0003 car Alternator cost

Evaluation

N.B. 03.07.2021

Top quality, decent price, prompt delivery, back on the road again

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Parts Details
  • Alternator Charge Current [A]: 150
  • Pulleys: with freewheel belt pulley
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 54
  • Number of ribs: 6
  • Length 3 [mm]: 45,5
  • Length [mm]: 42,5, 21
  • RIDEX: Alternator
  • Item number: 4G0003
  • Our price: £ 99,84
  • Condition: New
Details
RIDEX 4G0003 Alternator
Article number: 4G0003
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 157,97
£ 99,84
(Price per item)
price incl. 20% VAT, excl. delivery costs
-22%
RIDEX 4G0006 car Alternator cost
Parts Details
  • Alternator Charge Current [A]: 120
  • Pulleys: with freewheel belt pulley
  • Voltage [V]: 12
  • Length 3 [mm]: 61,50
  • Length [mm]: 40,00, 14,00
  • RIDEX: Alternator
  • Item number: 4G0006
  • Our price: £ 102,83
  • Condition: New
Details
RIDEX 4G0006 Alternator
Article number: 4G0006
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 131,97
£ 102,83
price incl. 20% VAT, excl. delivery costs
-40%
RIDEX 4G0160 car Alternator cost

Evaluation

C.K. 30.01.2024

it's OEM and cheapest.

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Parts Details
  • Alternator Charge Current [A]: 150
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 54
  • Number of ribs: 6
  • Plug Type ID: B2+(M8),L,DFM
  • Rotation Direction: Clockwise rotation
  • RIDEX: Alternator
  • Item number: 4G0160
  • Our price: £ 105,86
  • Condition: New
Details
RIDEX 4G0160 Alternator
Article number: 4G0160
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 176,97
£ 105,86
price incl. 20% VAT, excl. delivery costs
-36%
RIDEX 4G0039 price of Alternator for my car
Parts Details
  • Alternator Charge Current [A]: 120
  • Pulleys: with freewheel belt pulley
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 54
  • Number of ribs: 6
  • Number of grooves: 6
  • Plug Type ID: PL57, Plug 670, PLUG138
  • Service exchange part
  • Vehicle Main Current: for vehicles with 12V main current
  • Position / Degree: L 78
  • Rotation Direction: Clockwise rotation
  • Alternator type: excl. vacuum pump
  • Fastening Type: Double Pivot Lever
  • Recommended additional repairs: V-Belt / V-Ribbed Belt
  • Clamp: B+(M8), SIG, FR, A
  • Length [mm]: 167
  • Distance from belt pulley to alternator [mm]: 42,5
  • RIDEX: Alternator
  • Item number: 4G0039
  • Our price: £ 108,75
  • Condition: New
Details
RIDEX 4G0039 Alternator
Article number: 4G0039
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 169,97
£ 108,75
(Price per item)
price incl. 20% VAT, excl. delivery costs
-37%
RIDEX 4G0045 price of Alternator for my car
Parts Details
  • Alternator Charge Current [A]: 150
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 54
  • Number of ribs: 6
  • Plug Type ID: L-DFM (Plug 141)
  • Vehicle Main Current: for vehicles with 12V main current
  • Clamp: M8
  • Net weight [kg]: 6,8
  • RIDEX: Alternator
  • Item number: 4G0045
  • Our price: £ 113,95
  • Condition: New
Details
RIDEX 4G0045 Alternator
Article number: 4G0045
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 182,97
£ 113,95
price incl. 20% VAT, excl. delivery costs
-37%
RIDEX 4G0047 price of Alternator for my car

Evaluation

G.G. 20.01.2024

Affordable price, good quality!

E.D. 29.06.2021

le moin chère sur le marcher 5 site connus différent

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Parts Details
  • Alternator Charge Current [A]: 150
  • Pulleys: with freewheel belt pulley
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 54,3
  • Number of ribs: 6
  • Number of grooves: 6
  • Plug Type ID: PL324
  • Rotation Direction: Clockwise rotation
  • Fastening Type: Double Pivot Lever
  • Clamp: L, B+(M8)
  • Length [mm]: 180
  • Distance from belt pulley to alternator [mm]: 42,6
  • RIDEX: Alternator
  • Item number: 4G0047
  • Our price: £ 129,92
  • Condition: New
Details
RIDEX 4G0047 Alternator
Article number: 4G0047
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 208,97
£ 129,92
price incl. 20% VAT, excl. delivery costs
-44%
RIDEX 4G0014 price of Alternator for my car
Parts Details
  • Alternator Charge Current [A]: 120
  • Pulleys: with freewheel belt pulley
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 60,0
  • Number of ribs: 6
  • Vehicle Main Current: for vehicles with 12V main current
  • Cooling Type: Air cooled
  • Quantity Unit: Piece
  • Units / Pulleys: incl. vacuum pump
  • RIDEX: Alternator
  • Item number: 4G0014
  • Our price: £ 134,47
  • Condition: New
Details
RIDEX 4G0014 Alternator
Article number: 4G0014
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 240,97
£ 134,47
(Price per item)
price incl. 20% VAT, excl. delivery costs
-37%
RIDEX Alternator 4G0148 car Alternator cost uk

Evaluation

M.B. 09.10.2021

I need the correct alternator and this brand has been great over everything I have ordered from autodoc. thank you.

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Parts Details
  • Alternator Charge Current [A]: 150,0
  • Pulleys: with freewheel belt pulley
  • Voltage [V]: 14,0
  • Belt Pulley Ø [mm]: 48,5
  • Number of ribs: 7
  • Vehicle Main Current: for vehicles with 12V main current
  • RIDEX: Alternator
  • Item number: 4G0148
  • Our price: £ 137,66
  • Condition: New
Details
RIDEX 4G0148 Alternator
Article number: 4G0148
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 220,97
£ 137,66
(Price per item)
price incl. 20% VAT, excl. delivery costs
DENSO Alternator DAN938 car Generator cost uk
Parts Details
  • Alternator Charge Current [A]: 100
  • Pulleys: with freewheel belt pulley
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 58
  • Number of ribs: 7
  • Vehicle Main Current: for vehicles with 12V main current
  • New Part
  • Quality: OE
  • DENSO: Alternator
  • Item number: DAN938
  • Our price: £ 227,37
  • Condition: New
Details
DENSO DAN938 Alternator
Article number: DAN938
£ 227,37
price incl. 20% VAT, free delivery
VALEO Alternator 437539 car Alternators cost uk
Parts Details
  • Product line: REMANUFACTURED PREMIUM
  • Alternator Charge Current [A]: 180
  • Pulleys: with belt pulley, with freewheel belt pulley
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 52
  • Number of ribs: 7
  • Service exchange part
  • Rotation Direction: Clockwise rotation
  • Connector / Clamp: without connection for speed sensor
  • Fastening Type: Direct fastening
  • Weight [kg]: 8,18
  • Connector type: B+(M8)
  • VALEO: Alternator
  • Item number: 437539
  • Our price: £ 244,13
  • Condition: Remanufactured
Details
VALEO 2542969 Alternator
Article number: 437539
£ 244,13
price incl. 20% VAT, free delivery
ROTOVIS Automotive Electrics Alternator 9042740 car Alternator cost uk
Parts Details
  • Alternator Charge Current [A]: 100
  • Pulleys: with multi-belt pulley
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 54
  • Number of ribs: 5
  • Position / Degree 0
  • Rotation Direction: Clockwise rotation
  • Connector / Clamp: without connection for speed sensor
  • Fastening Type: Double Pivot Lever
  • ROTOVIS Automotive Electrics: Alternator
  • Item number: 9042740
  • Our price: £ 134,16
  • Condition: Remanufactured
Details
ROTOVIS Automotive Electrics 9042740 Alternator
Article number: 9042740
£ 134,16
price incl. 20% VAT, excl. delivery costs
VALEO Alternator 437507 car Generator cost uk
Parts Details
  • Product line: REMANUFACTURED PREMIUM
  • Alternator Charge Current [A]: 180
  • Pulleys: with belt pulley, with V-ribbed belt pulley
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 58
  • Number of ribs: 6
  • Service exchange part
  • Position / Degree: R 90
  • Rotation Direction: Clockwise rotation
  • Connector / Clamp: without connection for speed sensor
  • Fastening Type: Four-point attachment
  • Weight [kg]: 7,74
  • Connector type: B+(M8)
  • VALEO: Alternator
  • Item number: 437507
  • Our price: £ 221,95
  • Condition: Remanufactured
Details
VALEO 2542784 Alternator
Article number: 437507
£ 221,95
price incl. 20% VAT, free delivery
DENSO Alternator DAN1023 car Alternators cost uk

Evaluation

K.B. 11.04.2024

all good, fits perfect!?

L.W. 24.02.2023

Denso is a quality brand

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Parts Details
  • Alternator Charge Current [A]: 120
  • Pulleys: with multi-belt pulley
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 51
  • Number of ribs: 6
  • Vehicle Main Current: for vehicles with 12V main current
  • New Part
  • Quality: OE
  • DENSO: Alternator
  • Item number: DAN1023
  • Our price: £ 162,17
  • Condition: New
Details
DENSO DAN1023 Alternator
Article number: DAN1023
£ 162,17
price incl. 20% VAT, free delivery
NIPPARTS Alternator J5118013 car Alternator cost uk
Parts Details
  • Alternator Charge Current [A]: 70
  • Voltage [V]: 12
  • Number of grooves: 4
  • NIPPARTS: Alternator
  • Item number: J5118013
  • Our price: £ 142,19
  • Condition: New
Details
NIPPARTS J5118013 Alternator
Article number: J5118013
£ 142,19
price incl. 20% VAT, free delivery

Car Generator : which brand is better?

According to our customers, the best spare parts in the auto Alternators product category come from the following brands:

  • RIDEX
  • DENSO
  • STARK
  • ROTOVIS Automotive Electrics
  • AS-PL

Auto Alternator: how much does this product cost?

The price of car parts within the auto Alternator category ranges from £88 to £245, depending on the vehicle type, manufacturer, and product specifications.

Alternator replacement: video repair guide

How to change alternator on MERCEDES-BENZ 190 W201 TUTORIAL | AUTODOC

How to change alternator on MERCEDES-BENZ 190 W201 TUTORIAL | AUTODOC Top brands that produce alternator: BOSCH, STARK, SACHS, SKF, VAN WEZEL, VALEO,...

Step by Step Video Tutorial for Do-it-yourself Auto Repair. Become an amateur mechanic with Autodoc.

Popular posts

Alternator: choose from 113928 options on AUTODOC

Alternator from 88 manufacturers at prices from 88£ to 245£

The bestselling products:
DRA6000 LRA02807 9045340 LRA02910 LRB00500 LRA02815
From popular manufacturers:
RIDEX DENSO STARK ROTOVIS Automotive Electrics AS-PL BV PSH
For popular car brands:
BMW VW AUDI MERCEDES-BENZ FORD VAUXHALL
Alternator – technical details
Belt Pulley Ø [mm] Alternator Charge Current [A] Pulleys
55 69 70 90 with multi-belt pulley with freewheel belt pulley
56 54 65 55 with belt pulley V-Ribbed Belt Pulley
60 50 35 120 without belt pulley с ремённым шкивом

Generator for cars: find out more! How to choose, when to change , and how much they cost

A car’s alternator is a device that transforms the mechanical power of crankshaft rotation into electric current. The energy it produces is used to charge the battery and power various electrical devices while the engine is running. In some cars, this unit is also used to start the engine.

Car alternator at favorable price

Types

  • With carbon brushes. These are the most common alternators. In such devices, the exciter winding is mounted on the rotor shaft. The excitation current flows to the rotor through carbon brushes.
  • Brushless. These are less common. They are reliable and durable. These alternators have the exciter winding mounted directly on a stator. Electromotive force is formed due to changes in magnetic conductivity of the air gap between the rotor and the stator.

Moreover, the devices differ in size, relative positions of some of their elements, power, and performance.

Apart from conventional alternators, there are combined starter motor/alternator assemblies. Typically, they are installed on hybrid vehicles or cars equipped with the “Start-Stop” system.

Operating tips

After performing any repair job or inspection of the unit, always make sure the wires were connected correctly. Reversing the polarity of connection may lead to the breakdown of rectifier diodes and voltage regulator. Remember, if you disconnect the alternator from the battery while the engine is running, this may damage the vehicle’s electrical system. Never try to check if the unit is operable with the help of a spark by connecting the unit’s positive terminal to the car body. Do not jump-start another car while the engine in your car is running.

Keep your engine bay clean. Soiling is dangerous both for the unit housing, as this can lead to its corrosion, and for electrical contacts because they might oxidise. But remember to protect the alternator from splashes when washing the engine, for example, by covering it with a durable plastic bag.

Inspect the drive mechanism regularly. An overtightened belt or improperly installed rollers can cause the pulley bearing to fail prematurely. Remember, the pulley is also a consumable. The car manufacturers specify its service life in the owner’s manual. Replace the pulley when it ends.

Avoid driving through deep puddles. If there is no other way, try to cross them carefully at low speed. Temperature variations can damage the unit.

Symptoms of malfunctions

Diode bridge faults, voltage regulator malfunctions, torn or loose drive belt almost always lead to the undercharging of the battery. Therefore, if your battery warning light is constantly blinking during driving, you will usually need to check your alternator. If your headlights are dim and the horn sounds rattling while the engine is running, this may also indicate malfunctions of the unit. You may notice specific humming from under the bonnet in case the bearing is worn out. Whistling noise usually indicates that the belt is torn or has oil on it.

Causes of malfunctions

Water or a mixture of oil and dirt getting onto the circuit board of the diode bridge, as well as reversing the connection polarity, can cause the bridge to burn out. Reversed polarity is also dangerous for other alternator parts, including the voltage regulator, which can also fail after a short circuit in the vehicle mains. Incorrectly mounted idlers and tensioners, as well as errors in belt installation, can lead to the pulley breakdown. Brushes fail because of normal wear and tear.

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In our online shop, you can always buy an alternator for your car at a bargain price. Subscribe to our newsletter to receive up-to-date information concerning the components for your car.

Alternator for popular car models

Useful information on functions, causes of malfunction, diagnosis and replacement intervals

FAQ

How to make an alternator to serve as long as possible?

Follow these simple recommendations in order to avoid premature breakdown of this component:

  • Try to avoid deep puddles or reduce speed before driving through them. Moisture coming to the component can cause its breakdown.
  • When cleaning the space under the bonnet, protect the alternator and other electrical components from water with a polyethene film.
  • Clean the unit with compressed air during every scheduled engine maintenance.
  • Check and adjust tensioning of the V-ribbed belt regularly.
  • Use a torque wrench for tightening fasteners.
  • Avoid installation of additional equipment to protect the car’s electrical system from overloading.
How to detect an alternator malfunction?

The first step of checking the unit is to assess its condition visually. Its casing should have no cracks and dents, and its belt should not have critical abrasions and damaged parts. There should be no bent wires and sparks in places of their connection to the terminals.

The next step is to measure the voltage on the battery terminals, for which you’ll need a multimeter. It should be 12,5–12,7 V with the engine off, and 13,8–14,5 V with the running engine and all electrical components turned off. Under the load, with the air-conditioning system, headlights, the heater, and window heating turned on, it should be no less than 13,7–14,0 V.

If any malfunctioning takes place, remove and disassemble the component. You can estimate the wear degree of the brushes by checking their height, and of the contact rings by assessing their diameter. Measure the resistance of the rotor and stator winding and the diode bridge to define whether there is an open circuit. Compare the received data with those specified in the vehicle’s technical documentation.

How to repair or change an alternator yourself?

The procedure can differ for cars of various makes and models. It mostly depends on the arrangement of the components under the hood. For instance, on some cars, the unit can be accessed after opening the hood, while on others – from under a lifted car. Usually, the replacement requires the following steps

  1. Disconnect the negative terminal from the battery.
  2. Remove the components blocking access to the alternator.
  3. Remove the drive belt.
  4. Take a photo of or mark the wires to avoid mistakes during reassembling. Disconnect them.
  5. Unscrew all fasteners and remove the unit.
  6. Install a new part.
  7. Inspect the belt and pulleys visually. Replace them if necessary.
  8. Connect all contacts and install the removed components back to their places

The alternator repair consists of replacing the contact rings and brushes, bearings, freewheel clutch and diode bridge. If you have experience in such repairs, you can do this yourself. Otherwise, seek assistance from a car workshop electrician.