Description
Part Description
This OEM alternator was removed from a 2010 Mazda MAZ6 equipped with a 2.5L engine. The part has been thoroughly inspected by our experienced technicians and is currently on the shelf ready for immediate shipment. As a genuine Mazda factory component, this alternator maintains the original specifications and quality standards of your vehicle.
The alternator is a critical component of your vehicle’s charging system, responsible for converting mechanical energy from the engine into electrical energy to power your car’s electrical systems and recharge the battery. Common alternator failures include worn brushes, faulty diodes, or bearing problems that can leave you stranded with a dead battery. Symptoms of alternator failure include dimming headlights, dashboard warning lights, strange noises, or difficulty starting the vehicle.
At 603 Auto Salvage, we maintain an inventory of over 50,000 quality used auto parts from more than 1,100 vehicles. Our experienced team carefully inspects each component to ensure reliability and performance. Browse our extensive online catalog or contact us to speak with our knowledgeable parts specialists who can help you find the exact component you need for your repair. 50,000+ parts in stock from over 1,100 vehicles. Contact us or call (603) 392-7313 for anything you need.
Part Specifications
| Part | Alternator Assembly – 2.5L Engine |
| Interchange # | 55871 |
| OEM Part Number | Contact for OEM# |
| Side | N/A |
| Part Grade | C — Grade C – Functional condition with 200K miles, inspected and ready to ship |
| Warranty | 30-Day Warranty (Standard coverage for high-mileage electrical components) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2010 MAZDA MAZ6 |
| VIN | N/A |
| Vehicle Stock # | 1122245242 |
Our Testing & Inspection Process
Every part at 603 Auto Salvage is inspected before listing. Here is what was verified on this Alternator Assembly – 2.5L Engine:
| ✅ Electrical Output Test | Verified proper voltage and amperage output within specifications |
| ✅ Bearing Condition | Bearings rotate smoothly without excessive play or noise |
| ✅ Brush and Slip Ring Wear | Brushes and slip rings show acceptable wear patterns |
| ✅ Case and Mounting Points | Housing intact with no cracks, mounting ears undamaged |
| ✅ Pulley and Shaft | Pulley securely attached, shaft straight with no damage |
| ✅ Electrical Connections | All terminals and connections clean and corrosion-free |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #55871, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2010 | Mazda | MAZ6 | 2.5L engine – Contact us for full compatibility list |
Questions? Need a shipping quote? Call us now:
603 Auto Salvage | 233 Main St, Plaistow, NH 03865
Mon–Fri 8am–4:30pm | Sat 8am–2pm | Sun Closed
Warranty & Shipping
Frequently Asked Questions
Will this alternator fit my 2010 Mazda 6 with 2.5L engine?
Yes, this alternator is specifically from a 2010 Mazda MAZ6 with 2.5L engine and should be compatible. We recommend verifying the interchange number 55871 matches your vehicle’s requirements.
What are the signs that I need a new alternator?
Common symptoms include dimming headlights, dashboard warning lights, strange grinding or whining noises from the engine bay, difficulty starting, or a dead battery that won’t hold a charge.
How long does an alternator typically last?
Most alternators last between 80,000 to 150,000 miles depending on driving conditions and maintenance. Factors like extreme temperatures, frequent short trips, and electrical system issues can affect lifespan.
Is this a genuine Mazda alternator or aftermarket?
This is a genuine OEM alternator that was originally installed in a 2010 Mazda MAZ6. It maintains all original specifications and quality standards of the factory part.
What warranty comes with this used alternator?
This alternator includes our 30-day warranty covering defects in materials and workmanship. All parts are inspected before shipping to ensure proper function.
Can I install this alternator myself?
While alternator replacement is possible for experienced DIY mechanics, it requires disconnecting the battery, removing the serpentine belt, and working with electrical connections. Professional installation is recommended if you’re not comfortable with automotive electrical work.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| Interchange Number | 55871 |
| Stock Number | 1122245242 |
| Engine Size | 2.5L |
| Part Number | 601 |
Price Comparison — Why Used OEM Makes Sense
| Source | Price Range | Warranty | Notes |
|---|---|---|---|
| Dealer (New OEM) | $180-250 | 1 year | Brand new, longest wait time |
| Aftermarket | $90-140 | Varies | Non-OEM fitment, quality varies |
| Other Salvage Yards | $65-85 | 30–60 days | Varies in quality and testing |
| 603 Auto Salvage | $55 | 30-Day Warranty | Tested, Grade C, ships in 24hrs |
Installation Notes
- Disconnect the negative battery cable first and wait 10 minutes before beginning work
- Take a photo of wire connections before removal to ensure proper reconnection
- Check serpentine belt condition and replace if worn while alternator is accessible
- Clean all electrical connections with contact cleaner before installation
- Torque mounting bolts to manufacturer specifications to prevent vibration damage
- Test charging system after installation to verify proper operation
🔍 Free Fitment Check
Call us with your VIN and we will verify compatibility for free. No obligation, no pressure — just answers.
Our parts specialists check interchange data in real-time
Estimated Shipping Costs by Region
This part ships via FedEx Ground. Prices are estimates — call for an exact quote to your zip code.
| Region | Estimated Cost | Transit Time |
|---|---|---|
| New England (NH, MA, ME, VT, CT, RI) | $15 – $30 | 1–3 business days |
| Northeast (NY, NJ, PA, MD, VA) | $20 – $40 | 2–4 business days |
| Southeast (FL, GA, NC, SC, TN) | $25 – $45 | 3–5 business days |
| Midwest (OH, MI, IL, IN, WI, MN) | $30 – $50 | 3–5 business days |
| Southwest (TX, AZ, NM, OK) | $35 – $55 | 4–6 business days |
| West Coast (CA, OR, WA) | $40 – $65 | 5–7 business days |
Local pickup is always free. Free delivery within 30 miles of Plaistow, NH.
Why Buy From 603 Auto Salvage?
- 50,000+ parts in stock from over 1,100 vehicles on-site in Plaistow, NH
- Every part inspected before listing — no guesswork
- Family-owned salvage yard — real people, not a call center
- 30-Day Warranty on this part
- Fast shipping — most orders ship within 24 hours
- Competitive pricing — save 50–70% vs dealer prices
- Serving New Hampshire, Massachusetts & all 50 states
Ready to order? Call (603) 392-7313 or add to cart above. We are here to help.




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