A4503 12V 250A Alternator Fits Bmw 520d, Bmw 525d, Bmw 725d
Price range: £206.10 through £277.44
Compare the A4503 12V 250A alternator from Sahibs Auto Electrics with the unit currently fitted. Listed applications include selected BMW 520d, BMW 525d, BMW 725d, BMW X3 18d models. Identification references include Lucas LRA04503, Bosch 125815007. Its listed 12V 250A rating provides an electrical matching point for your existing unit. Check the 6-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 A4503 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 | 6 qty |
| Pulley Diameter | 50 mm |
| Insulated Return | No |
| Water cooled | No |
| Vacuum pump | No |
| Start/Stop | No |
| Weight | 7.7 Kg |
Cross Reference
| Reference Number | Brand |
|---|---|
| DYA4503 | Dyno Electrics |
| UD102484A | AS-PL |
| 12318575060 | BMW |
| 12318587941 | BMW |
| 8575060 | BMW |
| 8587941 | BMW |
| 125815007 | BOSCH |
| 125815008 | BOSCH |
| 6.8107.1 | IKA |
| ALTJ511 | 3EFFE |
| G100915 | BTS TURBO |
| G101196 | BTS TURBO |
| CAL10A16GS | CASCO |
| 40771 | CEVAM |
| 2153292502 | DRI |
| 58022 | EAI |
| 28-8612 | ELSTOCK |
| 115528 | FARCOM |
| 3115572 | HENKEL PARTS |
| H55101388G | HOFFER |
| 20010A16OV | ITAB AUTOMOTIVE |
| 555380RIB | KUHNER |
| 555380RIR | KUHNER |
| LRA04503 | LUCAS |
| LRA4503 | LUCAS |
| 55101388G | MEAT & DORIA |
| 215.911.250.210 | PSH |
| 215.911.250.280 | PSH |
| 2010161AOE | REAL |
| 2010A16.1 | SANDO |
| A12BH1375 | SIDAT |
| ALT12A160 | SIOM |
| BM8140 | SNRA |
| 022ST85 | STARTCAR |
| AL04381 | TMI |
| 21729N | WAI / TRANSPO |
Vehicle Applications
| Brand | Model | Engine | Engine Code | Series | Model Type | Type | Year |
|---|---|---|---|---|---|---|---|
| BMW | 520d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G30 | 2016 - 2023 | ||
| BMW | 520d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G30 | xDrive | 2016 - 2023 | |
| BMW | 520d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G31 | xDrive Touring | 2017 - | |
| BMW | 520d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G31 | Touring | 2017 - | |
| BMW | 520d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G31 | xDrive Touring Van | 2017 - 2019 | |
| BMW | 520d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G31 | Touring Van | 2017 - 2019 | |
| BMW | 525d | 2.0 (1995ccm) Diesel | B47D20B | G30 | 2017 - 2019 | ||
| BMW | 525d | 2.0 (1995ccm) Diesel | B47D20B | G31 | Touring | 2017 - 2019 | |
| BMW | 725d | 2.0 (1995ccm) Diesel | B47D20B | G11 | 2015 - 2019 | ||
| BMW | 725d | 2.0 (1995ccm) Diesel | B47D20B | G12 | Long | 2015 - 2019 | |
| BMW | 725d | 2.0 (1995ccm) Diesel | B47D20B | G11 | 2017 - 2019 | ||
| BMW | 725d | 2.0 (1995ccm) Diesel | B47D20B | G12 | Long | 2017 - 2019 | |
| BMW | X3 18d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G01 | sDrive | 2018 - 2020 | |
| BMW | X3 20d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G01 | xDrive | 2017 - 2020 | |
| BMW | X3 20d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G01 | xDrive VAN | 2017 - | |
| BMW | X3 25d | 2.0 (1995ccm) Diesel | B47D20B | G01 | xDrive | 2018 - | |
| BMW | X3 sDrive 18d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G01 | VAN | 2018 - | |
| BMW | X4 20d | 2.0 (1995ccm) Diesel | B47D20A/B47D20B | G02 | xDrive | 2018 - 2020 | |
| BMW | X4 25d | 2.0 (1995ccm) Diesel | B47D20B | G02 | xDrive | 2018 - |
Description
A4503 Replacement Alternator
Choose a replacement by comparing the A4503 alternator and its Lucas reference, LRA04503, with your existing unit. The listed electrical rating is 12V 250A. An alternator maintains battery charge and supplies electrical power while the engine runs. Applications include selected BMW 520d 2.0 Diesel 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.
- 6-groove pulley: check belt profile and alignment against the existing unit.
- Lucas LRA04503 reference: a starting point for identifying the replacement.
Compatible Vehicles and Applications
- BMW 520d 2.0 Diesel – selected applications 2016–2023 (engine code B47D20A/B47D20B).
- BMW 525d 2.0 Diesel – selected applications 2017–2019 (engine code B47D20B).
- BMW 725d 2.0 Diesel – selected applications 2015–2019 (engine code B47D20B).
- BMW X3 18d 2.0 Diesel – selected applications 2018–2020 (engine code B47D20A/B47D20B).
- BMW X3 20d 2.0 Diesel – selected applications 2017–2020 (engine code B47D20A/B47D20B).
- BMW X3 25d 2.0 Diesel – selected applications 2018 – (engine code B47D20B).
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 A4503. Compare them with the original unit and technical specifications; a number match alone does not establish vehicle compatibility.
125815007, 125815008, LRA04503, LRA4503
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 A4503 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 A4503 fit my BMW 520d?
BMW 520d 2.0 Diesel (2016–2023) is a listed application. Confirm the engine code and original unit configuration in the detailed fitment table.
Does A4503 replace Lucas LRA04503?
Lucas LRA04503 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 A4503?
The listed details include 12V, 250A output, 6 pulley grooves. Compare the complete specifications on this page with the unit being replaced.
Is A4503 new or remanufactured?
Check the current product condition selection for A4503. Confirm the supplier and availability of the option you want before completing the order.
What should I compare before ordering A4503?
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.
