OEM 90 Amp Alternator for 1998-2005 Audi & Volkswagen • A4, Passat
Product Notes
This is a 90 amp alternator. Please verify that your vehicle is equipped with the 90 amp version before ordering, as higher amperage units were also available. For 1999 Passat, this fits vehicles from VIN 150001. For 2002 Audi A4 and S4, this fits models with the 8th digit of the VIN being 'D'. For 1998 Audi A6, this fits models with the 8th digit of the VIN being 'B'. You may need to swap the pulley from your original alternator.
Why Buy Used OEM Parts?
- ✓ Quality-Verified: Every used OEM part we sell has been professionally inspected and tested. While it may show some cosmetic wear, it's fully functional and ready to install.
- ✓ Original Equipment: This is a genuine OEM part — the exact part that came with your vehicle from the factory. Perfect fitment and performance.
- ✓ Works Like New: Despite visual wear, internal components and functionality are intact. Same reliability you'd expect from OEM quality.
- ✓ Significant Savings: Save 50–80% vs. new. Factory quality at a fraction of the cost — the smart choice for budget-conscious owners.
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Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Avant | Wagon | 2000 | L4 1.8L Turbo | FWD | Automatic & Manual |
| Base | Sedan | 2000 - 2002 | L4 1.8L Turbo | FWD | Automatic & Manual |
| Avant Confort | Wagon | 2001 | L4 1.8L Turbo | FWD | Automatic & Manual |
| Avant Luxury | Wagon | 2001 | L4 1.8L Turbo | FWD | Automatic & Manual |
| Basico | Sedan | 2001 | L4 1.8L Turbo | FWD | Automatic & Manual |
| Confort | Sedan | 2001 | L4 1.8L Turbo | FWD | Automatic |
| Luxury | Sedan | 2001 | L4 1.8L Turbo | FWD | Automatic |
| Sport | Sedan | 2001 | L4 1.8L Turbo | FWD | Automatic & Manual |
| Base | Sedan | 2002 | L4 1.8L Turbo | FWD | Automatic CVT |
| Confort | Sedan | 2002 | L4 1.8L Turbo | FWD | Automatic CVT & Manual |
| Luxury | Sedan | 2002 | L4 1.8L Turbo | FWD | Automatic CVT |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 1.8T | Sedan | 1999 - 2005 | L4 1.8L Turbo | FWD | Automatic |
| GLS | Sedan | 1999 - 2005 | L4 1.8L Turbo | FWD | Automatic & Manual |
| GLS | Sedan | 1999 | L4 1.8L Turbo | AWD | Automatic & Manual |
| GLS | Wagon | 1999 | L4 1.8L Turbo | AWD | Automatic & Manual |
| GLS | Wagon | 1999 - 2005 | L4 1.8L Turbo | FWD | Automatic & Manual |
| GL | Sedan | 2003 - 2005 | L4 1.8L Turbo | FWD | Automatic |
| GL | Wagon | 2003 - 2005 | L4 1.8L Turbo | FWD | Automatic |
| GLS 4 Motion | Sedan | 2004 - 2005 | L4 1.8L Turbo | AWD | Automatic |
| GLS 4 Motion | Wagon | 2004 - 2005 | L4 1.8L Turbo | AWD | Automatic |
Policies
Shipping & Handling
- Standard shipping: 3-7 business days via UPS Ground
- Parts are carefully packaged to prevent damage during transit
Returns (30 Days)
We accept returns within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Electronic parts: Must be returned with the sealed inspection bag unopened. The clear bag allows full visual inspection before opening. Once opened, electronic parts can only be exchanged for a replacement if defective — no refunds
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: We cover return shipping as part of our 100% money-back guarantee
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
6-Month Warranty
All used parts include a 6-month warranty from the date of purchase.
- If your part fails within 6 months, we will send a replacement
- Refunds are only issued if we cannot provide a suitable replacement
- Warranty covers defects — not installation errors, misuse, or damage after installation
Note: Warranty is for replacement, not refund. A part failing on day 80? We'll replace it. But the return window for refunds is 30 days.
Damaged in Shipping?
If your part arrives damaged:
- Stop immediately — do not install the part
- Keep all original packaging and boxes
- Take clear photos of the damage and packaging
- Contact us within 48 hours of delivery
We will handle the carrier claim. You are not responsible for shipping damage — we just need your help documenting it.
Order Cancellation
Orders can be cancelled before shipment for a full refund. Once shipped, cancellations follow our return policy.
Audi A4, A6, S4 & VW Passat Alternator Guide (1998-2005): Diagnosing Whining Noises and Charging Issues
This guide covers common failure symptoms, replacement costs, and buying advice for the 90-amp alternator used in the 2000-2002 Audi A4/S4, 1998-2001 Audi A6, and 1999-2005 VW Passat.
Read Full Guide →⚠️ Related Trouble Codes (OBD-II)
3 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
Audi: 078903016E, 078903016G
Volkswagen: 038903018E, 038903018EX, 06B903016A, 06B903016D
Other: 06B903018DX
Fits Years: 1998 1999 2000 2001 2002 2003 2004 2005
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