- Shop with confidence: competitive prices, exclusive deals, and delivery perks.
- Need it quickly? We dispatch fast-moving parts daily. Check delivery options.
- Swap or return items within the standard return period with a simple process.
- Questions about fitment or orders? Our support team is ready to help.
Similar products
Customers also bought
Details
| Specification | Value |
|---|---|
| Brand | NAPA |
| MPN | nal1204 |
| Category | Power generator |
| Voltage [V] | 12 V |
| Alternator Charging Current [A] | 150 A |
| Manufacturer Restriction | Valeo |
| Belt Pulley Ø [mm] | 54 mm |
OE numbers (12)
Search by this OE number to find compatible parts
- ALPINA / BMW—12-31-7-79-05-48
- BMW—12317795620
- BMW—12317797519
- BMW—12317797520
- BMW—12-31-7-799-180
- ALPINA / BMW—12-31-7-799-181
- BMW—12-31-7-802-471
- ALPINA / BMW—12-31-7-802-927
- BMW—12318517262
- BMW—1237795048
- BMW—7799180
- BMW—7802471
Where this part fits
Original-fit position for OE 12318517262. The red ring marks where this part installs on the vehicle.
About this product
Sourced from NAPA, this power generator (NAL1204) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Voltage [V]: Zinc V, Alternator Charging Current [A]: 150 A, Manufacturer Restriction: Valeo, Number of ribs: Plastic, Belt Pulley Ø [mm]: 54 mm — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. 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: 0 986 080 580, 0986080580, 0986080850, 111904 and 103 more. Matching these numbers confirms a like-for-like replacement with no loss of function. NAPA 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 (97)
Show all 97 OE numbers
Power generator NAPA NAL1204 — compatible car models
| Car models | BMW: 1 Coupe (E82), 1 (E87), 3 Convertible (E93), 3 Coupe (E92), 3 (E90), 3 Touring (E91) |
|---|---|
| Engines | 120 d; 118 d; 325 d; 318 d |
| Year of manufacture | 2003-2013 |
| Manufacturer article number (MPN) | NAL1204 |
| OE part numbers | 12-31-7-79-05-48, 12317795620, 12317797519, 12317797520, 12-31-7-799-180, 12-31-7-799-181, 12-31-7-802-471, 12-31-7-802-927, 12318517262, 1237795048, 7799180, 7802471 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
NAPA nal1204 NAPA. Alternator Charging Current [A]: 150 A. Belt Pulley Ø [mm]: 54 mm. Manufacturer Restriction: Valeo. Number of ribs: 6. Pulleys: 50. Voltage [V]: 12 V
- 1x Power generator
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 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 NAPA Power generator have?
This NAPA Power generator has the following specifications: Voltage [V]: 12 V; Alternator Charging Current [A]: 150 A; Manufacturer Restriction: Valeo; Number of ribs: 6; Belt Pulley Ø [mm]: 54 mm; Pulleys: 50. 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: 12-31-7-79-05-48, 12317795620, 12317797519, 12317797520, 12-31-7-799-180, 12-31-7-799-181, 12-31-7-802-471, 12-31-7-802-927 and 4 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Power generator cost?
Power generator prices vary depending on brand, specifications, and vehicle compatibility. Check the current price above for this NAPA Power generator. All parts come with 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 12-31-7-79-05-48?
Yes, this NAPA Power generator is a direct replacement for OE part number 12-31-7-79-05-48. 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.
