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Details
| Specification | Value |
|---|---|
| Brand | ASTEMO-HITACHI |
| Voltage [V] | 14 V |
| Manufacturer Restriction | OE BOSCH |
OE numbers (11)
Search by this OE number to find compatible parts
- VAG—040903023
- VAG—040903023A
- VAG—043903023A
- VAG—043903023B
- VAG—043903023C
- VAG—043903023D
- VAG—043903503B
- AUDI / VW—043903803
- VAG—043903803E
- AUDI / VW—043903803F
- AUDI / VW—043903803G
Where this part fits
Original-fit position for OE 043903023C. The red ring marks where this part installs on the vehicle.
About this product
Sourced from ASTEMO-HITACHI, this alternator regulator (2500502) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Voltage [V]: Nylon V, Manufacturer Restriction: OE BOSCH — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Verified to fit VW 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: 0120489565, 0120489566, 0120489584, 0192052007 and 21 more. Matching these numbers confirms a like-for-like replacement with no loss of function. ASTEMO-HITACHI 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 (14)
Alternator Regulator ASTEMO-HITACHI 2500502 — compatible car models
| Car models | VW: KAEFER, KAEFER Convertible (15), TRANSPORTER T2 Bus (22, 23, 24), TRANSPORTER T2 Platform/Chassis (21, 26), TRANSPORTER T2 Van (21, 23) |
|---|---|
| Engines | 1200 1.2 (11); 1302,1303 1.6; 1.6 |
| Year of manufacture | 1947-2003 |
| Manufacturer article number (MPN) | 2500502 |
| OE part numbers | 040903023, 040903023A, 043903023A, 043903023B, 043903023C, 043903023D, 043903503B, 043903803, 043903803E, 043903803F, 043903803G |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
ASTEMO-HITACHI 2500502 . Manufacturer Restriction: OE BOSCH. Voltage [V]: 14 V
- 1x Alternator Regulator
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 Alternator Regulator compatible with my car?
This Alternator Regulator fits VW 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 ASTEMO-HITACHI Alternator Regulator have?
This ASTEMO-HITACHI Alternator Regulator has the following specifications: Voltage [V]: 14 V; Manufacturer Restriction: OE BOSCH. Check the full specifications table above for complete details.
What OE part numbers does this Alternator Regulator replace?
This Alternator Regulator replaces OE part numbers: 040903023, 040903023A, 043903023A, 043903023B, 043903023C, 043903023D, 043903503B, 043903803 and 3 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Alternator Regulator cost?
This ASTEMO-HITACHI Alternator Regulator is available for £21.99. Alternator Regulator prices vary depending on brand, specifications, and vehicle compatibility. ASTEMO-HITACHI parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Alternator Regulator?
Regular inspection of your Alternator Regulator is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Alternator Regulator?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Alternator Regulator fitted by a professional mechanic.
Can I use this part as a replacement for OE 040903023?
Yes, this ASTEMO-HITACHI Alternator Regulator is a direct replacement for OE part number 040903023. 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.
