A4584 12V 250A Alternator Fits Bmw M5, Bmw M8, Bmw M8 Coupe
Price range: £250.00 through £400.00
The A4584 12V 250A Alternator is a replacement charging unit from Sahibs Auto Electrics. Listed applications include selected BMW M5, BMW M8, BMW M8 Coupe, BMW M8 Gran Coupe models. Identification references include Lucas LRA04584, Valeo 443022. Its listed 12V 250A rating provides an electrical matching point for your existing unit. Check the 7-groove pulley, connections and mounting arrangement. Check the current condition options and availability before purchase. Match the exact engine and production details before ordering. Buy your A4584 replacement alternator online from Sahibs Auto Electrics for UK delivery or Click & Collect.
Product Specification
| Description | Value |
|---|---|
| AMP | 250 A |
| Volt | 12 V |
| No. of Grooves | 7 qty |
| Pulley Diameter | 50.2 mm |
| Mounting holes | 4 qty |
| B+ | M8 |
| Insulated Return | No |
| Water cooled | No |
| Vacuum pump | No |
| Start/Stop | No |
| Weight | 7.42 Kg |
Cross Reference
| Reference Number | Brand |
|---|---|
| DYA4584 | Dyno Electrics |
| 12317852129 | BMW |
| 12318053535 | BMW |
| 215937250 | PSH |
| 21974N | WAI |
| 443022 | Valeo |
| 718574 | Valeo |
| EG25U019 | Valeo |
| LRA04584 | Lucas |
| LRA4584 | Lucas |
Vehicle Applications
| Brand | Model | Engine | Engine Code | Series | Model Type | Type | Year |
|---|---|---|---|---|---|---|---|
| BMW | M5 | 4.4 (4395ccm) Petrol | S63B44B | F90 | xDrive | 2017 - 2023 | |
| BMW | M5 | 4.4 (4395ccm) Petrol | S63B44B | F90 | xDrive | 2018 - 2023 | |
| BMW | M5 | 4.4 (4395ccm) Petrol | S63B44B | F90 | xDrive | 2021 - 2022 | |
| BMW | M8 | 4.4 (4395ccm) Petrol | S63B44B | F91 | xDrive | 2019 - | |
| BMW | M8 Coupe | 4.4 (4395ccm) Petrol | S63B44B | F92 | xDrive | 2019 - | |
| BMW | M8 Gran Coupe | 4.4 (4395ccm) Petrol | S63B44B | F93 | xDrive Gran Coupe | 2019 - | |
| BMW | X5 M | 4.4 (4395ccm) Petrol | S63B44B | F95 | xDrive | 2019 - 2023 | |
| BMW | X5 M | 4.4 (4395ccm) Petrol | S63B44B | F95 | xDrive | 2019 - | |
| BMW | X6 M | 4.4 (4395ccm) Petrol | S63B44B | F96 | xDrive | 2019 - 2023 |
Description
A4584 Replacement Alternator
Start your A4584 alternator comparison with the linked Lucas reference LRA04584 and the specifications shown on this page. The listed electrical rating is 12V 250A. An alternator maintains battery charge and supplies electrical power while the engine runs. Applications include selected BMW M5 4.4 Petrol variants.
Key Features and Benefits
- 12V electrical system: match the vehicle voltage before selecting a unit.
- 250A output: compare the listed rating with the original alternator.
- 7-groove pulley: check belt profile and alignment against the existing unit.
- 4 mounting holes: compare the fixing pattern and unit position.
- M8 B+ terminal: check the connection against the original unit.
Compatible Vehicles and Applications
- BMW M5 4.4 Petrol – selected applications 2017–2023 (engine code S63B44B).
- BMW M8 4.4 Petrol – selected applications 2019 – (engine code S63B44B).
- BMW M8 Coupe 4.4 Petrol – selected applications 2019 – (engine code S63B44B).
- BMW M8 Gran Coupe 4.4 Petrol – selected applications 2019 – (engine code S63B44B).
- BMW X5 M 4.4 Petrol – selected applications 2019–2023 (engine code S63B44B).
- BMW X6 M 4.4 Petrol – selected applications 2019–2023 (engine code S63B44B).
These are selected applications, not the complete fitment list. Check the detailed vehicle compatibility table, engine code and production year, then compare the original unit before ordering.
OE Numbers and Cross-Reference Information
The following cross-reference numbers are associated with A4584. Compare them with the original unit and technical specifications; a number match alone does not establish vehicle compatibility.
443022, 718574, EG25U019, LRA04584, LRA4584
The full manufacturer cross-reference and OE listings are available elsewhere on this page. Confirm whether a number is an OE or aftermarket reference when comparing the original unit.
When Should You Replace Your Alternator?
Charging warning lights, repeated loss of battery charge, dim or fluctuating lights and inconsistent electrical operation can indicate a charging-system problem. Battery condition, wiring and the drive belt can produce similar symptoms; arrange a diagnostic check before replacing the alternator.
Why Buy from Sahibs Auto Electrics?
Sahibs Auto Electrics is a UK automotive electrical parts specialist supplying alternators and starter motors. Ask for help identifying A4584 using the existing part number and vehicle details. Check the current condition options and availability before purchase. Buy online for UK delivery or Click & Collect, checking the current order arrangements.
Frequently Asked Questions
Will A4584 fit my BMW M5?
BMW M5 4.4 Petrol (2017–2023) is a listed application. Confirm the engine code and original unit configuration in the detailed fitment table.
Does A4584 replace Lucas LRA04584?
Lucas LRA04584 is a listed identification reference. Compare it with the original unit and specifications; a cross-reference does not guarantee compatibility by itself.
What specifications are listed for A4584?
The listed details include 12V, 250A output, 7 pulley grooves. Compare the complete specifications on this page with the unit being replaced.
Is A4584 new or remanufactured?
Check the current product condition selection for A4584. Confirm the supplier and availability of the option you want before completing the order.
What should I compare before ordering A4584?
Compare 12V compatibility, 250A output, pulley configuration, mounting points and electrical connections with the original alternator.
Does a battery warning light prove the alternator has failed?
No. Battery, belt, wiring and control faults can also affect charging. Use a charging-system test to establish the cause before ordering a replacement.
