Alternator for BMW 4 Series G23 Convertible LCI 420i (2025)
This Alternator technical drawing provides a detailed breakdown of the assembly for the 4 Series G23 Convertible LCI 420i. It includes part names, part numbers and all associated mounting hardware for vehicles produced between 2025.
| No. | Description | Supp. | Qty | From | Up To | Part Number | Price | Notes | ||
|---|---|---|---|---|---|---|---|---|---|---|
| i | Please determine the installed alternator independently or via diagnosis. |
|||||||||
| 01 | RP alternator | 180A | 1 | 12318634166 | ENDED | Shop at ECS Tuning | ||||
| 01 | RP alternator | 250A | 1 | 12318634167 | Shop at ECS Tuning | |||||
| 01 | Alternator | 150A | 1 | 12318654280 | Shop at ECS Tuning | |||||
| 02 | Carbon brush set | 1 | 12315A284D3 | Shop at ECS Tuning | ||||||
| only applies to | ||||||||||
| -- | RP alternator | 180A | X | 12318634166 | ENDED | Shop at ECS Tuning | ||||
| -- | RP alternator | 250A | X | 12318634167 | Shop at ECS Tuning | |||||
| -- | Alternator | 150A | X | 12318654280 | Shop at ECS Tuning | |||||
| 03 | Part not available separately | 1 | 00000000000 | Shop at ECS Tuning | ||||||
| 04 | Star-socket screw | BM10X125 | 1 | 12319908092 | Shop at ECS Tuning | |||||
| 05 | Star-socket screw | BM10X75 | 1 | 07129908286 | Shop at ECS Tuning | |||||
| 06 | Cover cap, alternator | 150A | 1 | 12315A284C3 | Shop at ECS Tuning | |||||
| only applies to | ||||||||||
| -- | RP alternator | 180A | X | 12318634166 | ENDED | Shop at ECS Tuning | ||||
| -- | RP alternator | 250A | X | 12318634167 | Shop at ECS Tuning | |||||
| -- | Alternator | 150A | X | 12318654280 | Shop at ECS Tuning | |||||
Notes
- ENDED = the part has been discontinued (no longer available).
See Also
Frequently Asked Questions
- What assembly is shown in the BMW 4 Series G23 Convertible LCI 420i Alternator?
- This technical diagram illustrates the Alternator within the Engine electrical system group for the 4 Series G23 Convertible LCI 420i produced during 2025. It provides a detailed exploded view of the components, identifying key parts such as the RP alternator (Part #12318634166).
- Which models use the hardware listed in this Alternator?
- The hardware and components featured in the Alternator are specific to the 4 Series G23 Convertible LCI 420i produced during 2025. These technical specifications ensure that parts like the RP alternator (12318634166) are correctly matched to the vehicle's structural and mechanical requirements.
- How do I find specific parts within the Alternator assembly?
- Each item in the Alternator corresponds to the numbered list below the illustration. For the 4 Series G23 Convertible LCI 420i, you can identify the RP alternator by locating its position on the schematic, which then links to the official BMW part number 12318634166 for the Engine electrical system section.