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Bosch AL9404X - Alternator
Product Overview
The Bosch AL9404X Alternator is designed for Volkswagen vehicles, delivering a robust 120A output to power your car's electrical systems. This rebuilt alternator meets OE standards, ensuring exceptional reliability and precise fitment for various models. It efficiently converts mechanical energy from the engine into electrical energy, maintaining battery charge and supporting the vehicle's electronics. Choose Bosch AL9404X for dependable performance and peace of mind every time you service your vehicle.
Cross Reference Numbers
This Bosch AL9404X is equivalent to or replaces the following part numbers: 06B903016B, 06B903016E, 06B903018E.
Vehicle Compatibility
- Volkswagen Passat 1.8L4 (2000–2005)
- Volkswagen Passat 2.8 V6 (2004)
This may also fit other applications. Please use the vehicle selector tool to verify fitment.
Why Shop at eEuroparts.com?
- Proven Expertise: Over 25 years of experience with European vehicles means we know your car inside and out.
- Exclusive Kits That Fit™ - complete repair solutions with no guesswork
- Fitment Confidence: Our accurate cataloging ensures you get the right part the first time.
- Fast, Reliable Shipping: Orders ship quickly from our U.S.-based warehouses.
- Transparent Pricing: Competitive prices with no hidden fees or surprise charges.
- Established Trust: Serving the European auto community since 2000.
Frequently Asked Questions
What does the Bosch AL9404X Alternator do?
The Bosch AL9404X Alternator generates electrical power for your vehicle by converting mechanical energy into electrical energy, charging the battery and powering the vehicle's electrical systems while the engine is running.
How do I know if my Alternator needs replacement?
Key symptoms indicating a failing alternator may include a dim or flickering dashboard light, unusual noises such as whining or grinding, a dead battery, or an inability to start the vehicle. If you notice these signs, it may be time to replace your alternator.
Can I install the Bosch AL9404X myself?
Yes, the Bosch AL9404X can be installed as a DIY project. However, it is important to follow proper procedures and safety precautions when working with electrical components in your vehicle.
What are the symptoms of a faulty Alternator?
Common symptoms of a faulty alternator include dimming headlights, electrical system malfunctions, and battery warning lights. If you see DTCs such as P0620, P0621, and P0562, it may indicate a failing alternator.
Why should I choose Bosch for my Alternator needs?
Choosing Bosch means trusting a brand with a long-standing reputation for quality and performance. Order Bosch AL9404X today for a factory-correct replacement that restores safety and performance.
Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.
- BrandBosch
- ManufacturerBosch
- MPNAL9404X
- Part TypeAlternator
- OE Part Numbers06B903016B, 06B903018E, 06B903016E
- FeaturesAmperage Rating : 120
Case Color : Aluminum
Case Material : Aluminum
Cases Per Pallet (ORLY) : 60
External Fan Included : Yes
External Regulator Included : Yes
Fan Type : Internal
New Or Remanufacured : Remanufactured
One Wire Capable : No
Original Equipment Manufacturer Names : VA
Packaging : Box
Plug Clock Rear View Main Mounting Ear at 6 O Clock : 7
Plug Type : 367
Pulley Groove Quantity : 5
Pulley Included : Yes
Pulley Type / Belt Type (Alternator) : 5S-CP
Pulley Type : 5S
Regulator Type : Internal
Rotation Direction : Clockwise
Unit(s) per Car Qty (ORLY) : 1
Voltage : 12
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2000 | Volkswagen | Passat | GLS (1.8 L4 GAS) | Engine: AUG, Transmission Control: Manual, Notes: with Valeo Unit, To 120 Amp Alternator, with Bosch Unit |
| 2001 | Volkswagen | Passat | GLS (1.8 L4 GAS) | Engine: AUG, Engine: AWM, Transmission Control: Manual, Notes: with Valeo Unit, To 120 Amp Alternator, with Bosch Unit, Notes: with Valeo Unit, To 120 Amp Alternator |
| 2003 | Volkswagen | Passat | GL (1.8 L4 GAS) | Transmission Control: Manual, Notes: To 120 Amp Alternator |
| 2003 | Volkswagen | Passat | GLS (1.8 L4 GAS) | Transmission Control: Manual, Notes: To 120 Amp Alternator |
| 2005 | Volkswagen | Passat | GL (1.8 L4 GAS) | Transmission Control: Manual, Notes: To 120 Amp Alternator |
| 2005 | Volkswagen | Passat | GLS (1.8 L4 GAS) | Transmission Control: Manual, Notes: To 120 Amp Alternator |
| 2005 | Volkswagen | Passat | GLS 4 Motion (1.8 L4 GAS) | Transmission Control: Manual, Notes: To 120 Amp Alternator |
| 2004 | Volkswagen | Passat | GL (2.8 V6 GAS) | Notes: To 120 Amp Alternator, with Valeo Unit |
| 2004 | Volkswagen | Passat | GLS (2.8 V6 GAS) | Notes: To 120 Amp Alternator, with Valeo Unit |
| 2004 | Volkswagen | Passat | GLX (2.8 V6 GAS) | Notes: To 120 Amp Alternator, with Valeo Unit |
| 2004 | Volkswagen | Passat | GLX 4 Motion (2.8 V6 GAS) | Notes: To 120 Amp Alternator, with Valeo Unit |
| 2004 | Volkswagen | Passat | GL (1.8 L4 GAS) | Notes: with Valeo Unit, To 120 Amp Alternator |
| 2004 | Volkswagen | Passat | GLS (1.8 L4 GAS) | Notes: with Valeo Unit, To 120 Amp Alternator |
| 2004 | Volkswagen | Passat | GLS 4 Motion (1.8 L4 GAS) | Notes: with Valeo Unit, To 120 Amp Alternator |
Warranty Overview
At eEuroparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.
Standard Warranty – Most Parts
Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.
Protection: Defects in materials or workmanship under normal personal use.
Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.
Exclusions:
Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)
Commercial, fleet, rideshare, off-road, or racing use
Improper installation, misuse, accidents, or modifications
Not Covered: Labor, shipping, towing, or incidental costs.
Bison Performance Warranty – Our House Brand
Coverage: Limited Lifetime Warranty for as long as you own your vehicle.
Applies To: All products sold under the Bison Performance label.
Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.
Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).
What’s Included: Replacement of the defective product (labor and shipping excluded).
Warranty Claim Requirements
To keep claims fast and fair, we require:
Proof of purchase (invoice or order confirmation).
Photos or videos showing the defective part, order number, date, VIN, and odometer reading.
Diagnostic reports or part returns for non-visible issues may be requested.
Claims must be truthful, properly documented, and reflect normal consumer use.
Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.
For full details and exclusions, please see our complete Warranty Terms & Conditions.
This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.
Return Policy Overview
Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
To start a return, contact customer support via Chat or Contact Us.
Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)
Refunds: Issued to your original payment method within 3–5 business days after inspection
Exchanges: Not automatic — please return and reorder
Replacements: May be approved for incorrect or defective items reported within 7 days
Not returnable:
Used or installed parts
Electrical components
Opened filter kits, gaskets, or contaminated items
Final sale or custom orders
Important Notes:
Return shipping is your responsibility unless we made a verified error
Fitment is the customer’s responsibility (we can assist, but do not guarantee)
Country of origin may vary and is not grounds for return
For complete details, please see our full Return Policy.
This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.
Fast, Reliable Shipping — Straight to Your Door
We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.
We use trusted carriers like UPS, FedEx, and USPS.
Tracking info is emailed to you as soon as your order ships.
Delivery estimates at checkout are based on carrier data, but not guaranteed.
Need help with a shipment?
If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.
For complete details, please see our full Shipping Policy.
This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions, risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.










