Audi Henderson Parts4N1-903-028Part can be found as #1 in the diagram aboveGenuine Audi Parts Product Description
The Genuine Audi Alternator 4N1903028 OEM is the factory-engineered 48V high-output generator designed for modern Audi performance engines, including the 3.0L and 4.0L mild-hybrid (MHEV) platforms. Built to handle the heavy electrical loads of today’s advanced systems—like adaptive suspension, active roll stabilization, and start/stop technology—this alternator provides consistent voltage output and optimized charging efficiency under all driving conditions.
Manufactured to Audi’s exacting OEM standards, this alternator delivers exceptional power stability, durability, and thermal control, ensuring your electrical system operates at peak efficiency without voltage drop or battery drain.
Key Features & Benefits
True OEM Performance – Genuine Audi 48V alternator designed for MHEV systems.
High Efficiency Output – Engineered for 3.0T and 4.0T engines with heavy electrical loads.
Durable Design – Advanced cooling channels for reduced heat and extended component life.
Direct Fit Replacement – No coding or modification required; bolt-on installation.
Restores OEM Charging Stability – Prevents undercharging, flickering lights, and system errors.
Compatibility / Fitment
Engineered for Audi models equipped with 48V mild-hybrid systems, including:
Audi A6 / A7 / A8 / Q7 / Q8 / S6 / S7 / SQ7 / SQ8
Engine types: 3.0T V6 TFSI, 4.0T V8 TFSI, MHEV Hybrid Platforms
OEM Reference: 4N1 903 028 – 48V Alternator Assembly
(Verify with VIN for exact compatibility before installation.)
Installation Notes
Direct bolt-on replacement with OEM connectors.
Ensure battery is fully charged before startup.
Check drive belt condition during installation.
Why Choose Genuine OEM
Aftermarket alternators often fail to meet Audi’s precise 48V output calibration, leading to charging inconsistencies, error codes, and premature component failure. The Genuine Audi 4N1903028 Alternator ensures factory-level reliability, power delivery, and performance stability under all load Part 4N0-903-028-P, 4N0-903-028-PX, 4N1-903-028-X
ONLY PART REFERENCE #1 ON THE DIAGRAM IS INCLUDED
Terms and Conditions
Thank you for shopping with us. Please find our policies below.
If you have any other questions, please don't hesitate to contact us.
Shipping Terms
- In stock orders ship within 24 hours.
- Weekend orders will be processed the next business day.
- If a part is not in stock and must be ordered from the manufacturer, it usually takes 2-3 days to arrive to us and will be promptly shipped to you. Most of the orders are shipped complete within 2-3 business days. A few of the parts ordered from the manufacturer may take up to 5-6 business days to arrive and will shipped to you immediately.
- Depending upon location, ground shipments usually take 2-7 days.
- Your order may be shipped Overnight for an additional cost.
- Oversized shipments will be additional; you will be contacted prior to shipping for approval.
- We cannot guarantee transit times for ground and oversize orders.
- Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost to the customer.
- We do not ship internationally.
- In the unlikely event that a part has been placed on backorder or discontinued, we will do our best to try and find one for you as quickly as possible.
- We do not ship COD orders.
Return Policy
- Contact us to arrange for any returns.
- A copy of the invoice will need to be included with the return.
- Parts must be resaleable and in the original packaging.
- We cannot take back used parts.
- We cannot take back installed or tried parts.
- Electrical parts are not returnable.
- We do reserve the right to refuse and return any parts we find have been installed, are used or do not meet the above criteria.
- Return request need to be within 30 days of receipt.
- Special Order Items are not returnable under any circumstance
Cancellation Policy
- An order or a portion of an order may be cancelled up until the time it is shipped and no longer in our possession.
Cancellations of Orders
All orders placed Saturday to Sunday Have until 12:00pm the following Monday to cancel orders. Orders cancelledafter12:00pm Monday are subject to a15% restock fee for inbound items from warehouse locations.
Orders placed Monday thru Friday Have until 12:00pm the next business day to cancel orders.Orders cancelledafter12:00pm Monday are subject to a15% restock fee for inbound items from warehouse locations.
Home •Newsletter Signup •Contact UsCopyright © 2025 Audi Henderson Parts, All rights reserved.Solution by RevolutionParts, Inc. :: Design by OCDesignsOnline
