A Guide to the Alternator for the 2016-2020 Lincoln Navigator
Understand the signs of a failing alternator and how to choose the right replacement to keep your Navigator's electrical system performing flawlessly.
- A failing alternator will cause dim lights, electrical issues, and a battery warning light on the dash.
- Do not continue driving if you suspect the alternator is bad; your Navigator will eventually lose all electrical power and shut down.
- The 2016-2020 period covers two different Navigator generations; verify the correct amperage (e.g., 250A) for your specific model year before buying.
- Aftermarket brands like MPA offer a quality, cost-effective alternative to more expensive OEM Motorcraft parts.
Signs of a Failing Alternator in Your Navigator
A failing alternator in a Lincoln Navigator will usually give you a few warning signs. Because modern Navigators are packed with electronics, a weak alternator can cause a wide range of issues. Be on the lookout for these common symptoms:
- Battery Warning Light: The most obvious sign is a dashboard warning light shaped like a battery. This indicates a problem in the charging system.
- Dimming or Flickering Lights: You might notice the headlights, interior lights, or dashboard screen dim or flicker, especially when the engine is at idle.
- Electrical Gremlins: Seemingly random electrical problems can occur. The radio might act up, power windows could be slow, or you may see error messages on the dash.
- Weak or Dead Battery: An alternator that isn't charging properly will lead to a battery that can't hold a charge, making it difficult to start the vehicle.
- Strange Noises: A grinding or whining sound from the engine bay can point to failing bearings inside the alternator.
Known Issues, Recalls, and Service Bulletins
During the 2016-2020 model years, there have been no specific recalls issued by the National Highway Traffic Safety Administration (NHTSA) for the alternator itself. However, a recall for some 2020 Navigators involved a potential short circuit in the battery junction box, which could cause an engine fire. While not a direct alternator failure, it highlights the importance of a healthy electrical system. Always check for open recalls on your specific vehicle using your VIN on the NHTSA website.
Cost of Replacing a Lincoln Navigator Alternator
| Part Type | Estimated Part Cost |
|---|---|
| New OEM (Motorcraft) | $767 - $1,347 |
| New Aftermarket (MPA, etc.) | $572 - $595 |
| Shop Labor | $156 - $322 |
Choosing the Right Aftermarket Alternator
When your Navigator's alternator fails, you have a choice between an original equipment manufacturer (OEM) part from Motorcraft or an aftermarket part from a brand like MPA (Motorcar Parts of America).
- Motorcraft (OEM): This is the same brand that Lincoln installed at the factory. It guarantees a perfect fit and original performance. However, it is the most expensive option.
- MPA (Aftermarket): Brands like MPA's Quality-Built line offer a more affordable alternative. These parts are designed to meet or exceed original specifications and are a reliable choice for budget-conscious repairs. 🎬 Learn more about the manufacturing process of Quality-Built alternators. Aftermarket alternators often come with strong warranties, providing peace of mind.
Pro Tip: The 2016-2017 and 2018-2020 Navigators are from different generations and may use different alternators with varying amperage ratings (e.g., 250A). Always confirm the correct part number and specifications for your exact year and model before purchasing.
Frequently Asked Questions
Can I drive my Navigator with a bad alternator?
It is not recommended. Your vehicle will run on battery power alone, but only for a very short time. Once the battery is drained, the engine will shut off, and you will be stranded.
Is replacing the alternator a DIY job?
For a moderately experienced DIY mechanic, it is feasible. The job typically involves removing the serpentine belt, disconnecting the battery, unbolting the old alternator, and installing the new one. However, access can be tight. The difficulty is rated as moderate, taking around 1.5 to 2.5 hours. If you are not comfortable working with your vehicle's electrical system and engine belts, it's best to leave this job to a professional.
What does "remanufactured" alternator mean?
A remanufactured alternator is a used OEM core that has been completely disassembled, cleaned, and inspected. All wear components like bearings, brushes, and the voltage regulator are replaced with new parts. The unit is then tested to ensure it performs like new. It's a cost-effective and reliable alternative to a brand-new part.
Do I need to replace the battery at the same time?
Not always, but it's a good idea to have your battery tested. A failing alternator can put a major strain on the battery, potentially shortening its life. If the battery is old or fails a load test, replacing both at the same time can prevent future starting and charging issues.
Helpful Videos
Technical Specifications
OEM Part Numbers: JL1Z-10346-A FL1Z-10346-A FL1Z-10346-B JL1T-10300-AA
The alternator for the 2018-2020 Lincoln Navigator is typically a 250 Amp unit with a 6-groove serpentine decoupling pulley. The 2015-2017 models also use a 250 Amp unit. Always verify the amperage and part number for your specific vehicle.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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