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Bosch AL0731X - Alternator
Product Overview
The Bosch AL0731X Alternator is a high-performance replacement component designed specifically for Volkswagen vehicles. This 70A alternator meets or exceeds OEM specifications, ensuring exceptional reliability and fitment accuracy. It efficiently converts mechanical energy from the engine into electrical energy, essential for powering your vehicle's electrical systems. Trust in Bosch's engineering to deliver optimal power output for models such as the Jetta, Beetle, and Golf. Choose Bosch AL0731X for dependable performance and peace of mind every time you service your vehicle.
Cross Reference Numbers
This Bosch AL0731X is equivalent to or replaces the following part numbers: 038903023K, 038903023Q.
Vehicle Compatibility
- Volkswagen Jetta 2.8 V6 (2001–2003)
- Volkswagen Beetle 1.9 L4 (1999–2001)
- Volkswagen Golf 1.9 L4 (1999–2001)
- Volkswagen Jetta TDI 1.9 L4 (1999–2001)
- Volkswagen Beetle TDI 1.9 L4 (1998)
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 AL0731X Alternator do?
The alternator generates electrical power for your vehicle while the engine is running. It converts mechanical energy into electrical energy to recharge the battery and power electrical systems such as lights, radio, and air conditioning.
What vehicles is this part compatible with?
This Bosch AL0731X alternator is compatible with various Volkswagen models, including the Jetta, Beetle, and Golf, spanning model years from 1998 through 2003. Please use the vehicle selector tool to confirm fitment for your specific vehicle.
What are common signs this part may need replacement?
Key indicators that your alternator may need replacement include:
- Dim or flickering headlights
- Warning light on the dashboard
- Electrical accessories malfunctioning
- Dead battery
- Unusual noises such as grinding or whirring from the alternator area
Are there any DTC (Diagnostic Trouble Codes) associated with this part?
Common DTCs that may indicate alternator issues include P0562 (System Voltage Too Low) and P0670 (Alternator Malfunction). If you see DTCs such as P0562, it may indicate a failing alternator. For accurate diagnosis, consult professional repair documentation or an automotive expert.
Why should I choose Bosch for my Alternator needs?
Choosing Bosch ensures you receive a factory-correct replacement that restores the safety and performance of your vehicle. Order Bosch AL0731X today for a reliable solution to your automotive needs.
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
- MPNAL0731X
- Part TypeAlternator
- OE Part Numbers038903023Q, 038903023K
- FeaturesAlternator Finish : Aluminum
Alternator/Generator Rotation : Clockwise
Amperage Rating : 70
Brushless : No
Case Material : Aluminum
External Fan Included : Yes
External Regulator Included : Yes
Fan Type : Internal
New Or Remanufactured : Remanufactured
One Wire Capable : No
Plug Clock Rear View Main Mounting Ear at 6 O Clock : 1
Plug Type : 367
Prop 65 Warning Label Required? : No
Pulley Included : Yes
Pulley Type / Belt Type (Alternator) : 6S-CP
Regulator Type : Internal
Voltage : 12
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1998 | Volkswagen | Beetle | TDI (1.9 L4 DIESEL) | Notes: with Valeo Unit, To 70 Amp Alternator, From Chassis # 024256, with Bosch Unit |
| 1999 | Volkswagen | Beetle | GL (1.9 L4 DIESEL) | Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 1999 | Volkswagen | Beetle | GLS (1.9 L4 DIESEL) | Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 1999 | Volkswagen | Golf | GL (1.9 L4 DIESEL) | Engine: ALH, Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 1999 | Volkswagen | Golf | TDI (1.9 L4 DIESEL) | Engine: ALH, Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 1999 | Volkswagen | Jetta | TDI (1.9 L4 DIESEL) | Engine: ALH, Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 2000 | Volkswagen | Beetle | GL (1.9 L4 DIESEL) | Notes: To 70 Amp Alternator |
| 2000 | Volkswagen | Beetle | GLS (1.9 L4 DIESEL) | Notes: To 70 Amp Alternator |
| 2000 | Volkswagen | Golf | GL (1.9 L4 DIESEL) | Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 2000 | Volkswagen | Golf | GLS (1.9 L4 DIESEL) | Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 2000 | Volkswagen | Jetta | TDI (1.9 L4 DIESEL) | Notes: To 70 Amp Alternator, with Bosch Unit, with Valeo Unit |
| 2001 | Volkswagen | Beetle | GL (1.9 L4 DIESEL) | Notes: To 70 Amp Alternator, with Bosch Unit, with Valeo Unit |
| 2001 | Volkswagen | Beetle | GLS (1.9 L4 DIESEL) | Notes: To 70 Amp Alternator, with Bosch Unit, with Valeo Unit |
| 2001 | Volkswagen | Beetle | Sport (1.9 L4 DIESEL) | Notes: To 70 Amp Alternator, with Bosch Unit, with Valeo Unit |
| 2001 | Volkswagen | Golf | GL (1.9 L4 DIESEL) | Notes: To 70 Amp Alternator, with Bosch Unit, with Valeo Unit |
| 2001 | Volkswagen | Golf | GLS (1.9 L4 DIESEL) | Notes: To 70 Amp Alternator, with Bosch Unit, with Valeo Unit |
| 2001 | Volkswagen | Jetta | TDI (1.9 L4 DIESEL) | Notes: with Valeo Unit, To 70 Amp Alternator, with Bosch Unit |
| 2002 | Volkswagen | Jetta | GLI (2.8 V6 GAS) | Engine: BDF, Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 2002 | Volkswagen | Jetta | GLS (2.8 V6 GAS) | Engine: BDF, Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 2002 | Volkswagen | Jetta | GLX (2.8 V6 GAS) | Engine: BDF, Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 2003 | Volkswagen | Jetta | GLI (2.8 V6 GAS) | Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
| 2003 | Volkswagen | Jetta | GLX (2.8 V6 GAS) | Notes: with Bosch Unit, To 70 Amp Alternator, with Valeo Unit |
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.




















