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OE Quality
60-Day Returns
WAIPart #: 13978N
WAI 13978N Alternator
7 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$269.12Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Ford and Lincoln, LS and Thunderbird
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? See all Alternator options
WAI 13978N Alternator
| Brand | WAI |
|---|---|
| Part Number | 13978N |
| 12 | 12 |
| Fan Type | Internal |
| Rotation Direction | Clockwise (right) |
| Pulley Included | Yes |
| Family | Denso |
| Pulley Groove Quantity | 6 |
| Pulley Belt Type | Serpentine |
| Regulator Type | Internal |
| Decoupled Or Clutch Pulley | No |
| Amperage Rating | 140 |
This part fits 7 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2006 | Lincoln | LS | N/A | with 55mm OD Pulley | ||
| 2005 | Ford | Thunderbird | N/A | with 55mm OD Pulley | ||
| 2005 | Lincoln | LS | 3.9L | V8 | N/A | with 55mm OD Pulley |
| 2004 | Ford | Thunderbird | N/A | with 55mm OD Pulley | ||
| 2004 | Lincoln | LS | 3.9L | V8 | N/A | with 55mm OD Pulley |
| 2003 | Ford | Thunderbird | N/A | with 55mm OD Pulley | ||
| 2003 | Lincoln | LS | 3.9L | V8 | N/A | with 55mm OD Pulley |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
104210-3201104210-3202104210-4150104210-4910139783W4T-10300-AF3W4T-10300-AG3W4T-10300-AH3W4T-AG3W4T-AH3W4Z-10346-AA3W4Z-10346-AARM4W4T-10300-AA4W4T-AA4W4Z-10346-AA6W4T-10300-AA6W4T-AA6W4Z-10346-AA
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.