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Details
| Specification | Value |
|---|---|
| Brand | SEG Automotive |
| Category | Power generator |
| Voltage [V] | 48 V |
| Alternator Charging Current [A] | 210 A |
| Length [mm] | 217 mm |
| Position/Degree | R85.4 ° |
| Belt Pulley Ø [mm] | 54 mm |
OE numbers (15)
Search by this OE number to find compatible parts
- BMW—12318490432
- BMW—12318490438
- BMW—12 31 8 490 538
- BMW—12318661471
- BMW—8490432
- BMW—8490432-01
- BMW—8490438
- BMW—8490438-01
- BMW—8490438-02
- BMW—8490538
- BMW—8490538-01
- BMW—8490538-03
- BMW—8490538-04
- BMW—8661471
- BMW—8661471-01
Where this part fits
Original-fit position for OE 12318490538. The red ring marks where this part installs on the vehicle.
About this product
The SEG Automotive Power generator (0127823057) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Voltage [V]: 48 V, Alternator Charging Current [A]: 210 A, Length [mm]: 217 mm, Position/Degree: R85, Copper °, Belt Pulley Ø [mm]: 54 mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit BMW models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 0127823029, 0127823033, 0127823036, 0127823040 and 28 more. Matching these numbers confirms a like-for-like replacement with no loss of function. SEG Automotive is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Equivalent products (16)
Power generator SEG Automotive 0127823057 — compatible car models
| Car models | BMW: 2 Active Tourer (U06), 2 Coupe (G42, G87), 3 (G20, G80, G28), 3 Touring (G21, G81), 3 Touring Van (G21), 4 Convertible (G23, G83), 4 Coupe (G22, G82), 4 Gran Coupe (G26), 5 (G30, F90), 5 Touring (G31) (+4 more) |
|---|---|
| Engines | 223 d Mild Hybrid xDrive; 220 d Mild-Hybrid; 316 d Mild-Hybrid; 320 d Mild-Hybrid; 420 d Mild-Hybrid; 518 d Mild-Hybrid; 620 d Mild-Hybrid; xDrive 20 d Mild-Hybrid; sDrive 18 d Mild-Hybrid |
| Year of manufacture | 2016-2022 |
| Manufacturer article number (MPN) | 0127823057 |
| OE part numbers | 12318490432, 12318490438, 12 31 8 490 538, 12318661471, 8490432, 8490432-01, 8490438, 8490438-01, 8490438-02, 8490538, 8490538-01, 8490538-03, 8490538-04, 8661471, 8661471-01 |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
SEG Automotive 0127823057 Power generator. Alternator Charging Current [A]: 210 A. Belt Pulley Ø [mm]: 54 mm. Length [mm]: 217 mm. Number of grooves: 8. Number of mounting bores: 1. Number of threaded holes: 2. Position/Degree: R85,4 °. Pulleys: 4
- 1x Power generator
Shipping, returns, warranty
Free UK delivery on orders over £50.00. Tracked standard shipping.
- Standard delivery: 4–8 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Power generator compatible with my car?
This Power generator fits BMW vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this SEG Automotive Power generator have?
This SEG Automotive Power generator has the following specifications: Voltage [V]: 48 V; Alternator Charging Current [A]: 210 A; Length [mm]: 217 mm; Position/Degree: R85,4 °; Belt Pulley Ø [mm]: 54 mm; Pulleys: 4. Check the full specifications table above for complete details.
What OE part numbers does this Power generator replace?
This Power generator replaces OE part numbers: 12318490432, 12318490438, 12 31 8 490 538, 12318661471, 8490432, 8490432-01, 8490438, 8490438-01 and 7 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Power generator cost?
This SEG Automotive Power generator is available for £1427.99. Power generator prices vary depending on brand, specifications, and vehicle compatibility. SEG Automotive parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Power generator?
Watch for dimming headlights, warning light on dashboard, dead battery, strange noises from the engine, or electrical accessories malfunctioning.
What tools do I need to replace a Power generator?
Tools needed: socket set (8-17mm), spanner set, serpentine belt tool or breaker bar, multi-meter (for testing charge output), battery terminal clamp remover. Difficulty: Moderate DIY. Safety warning: Disconnect the battery negative terminal before starting. Never disconnect the alternator with the engine running -- voltage spikes will destroy ECU electronics.
Can I use this part as a replacement for OE 12318490432?
Yes, this SEG Automotive Power generator is a direct replacement for OE part number 12318490432. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
