The 2021 Lincoln Nautilus has 19 electrical bulb & socket parts with verified fitment on this page — 10 part types and 6 brands, covering both the 2.0L L4 Turbocharged and the 2.7L V6 Turbocharged. Each part includes a manufacturer part number and application notes.
On the 2021 Lincoln Nautilus, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. Most of the listed parts are Turn Signal Lamp Bulb (6 parts), Headlamp Socket (3 parts) and Daytime Running Light Socket (2 parts). The other 7 part types cover the remaining 8 parts.
The 2021 Lincoln Nautilus was sold with both the 2.0L L4 Turbocharged and the 2.7L V6 Turbocharged. All 19 parts on this page fit every engine.
The most listed brands for 2021 Lincoln Nautilus electrical bulb & socket parts are HELLA (8 parts), MOTORCRAFT (4 parts) and STANDARD MOTOR PRODUCTS (3 parts), plus 3 more brands. Quality grades include Standard Replacement and Extended Life.
2 parts on this 2021 Lincoln Nautilus page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including SYLVANIA 7440ALL (Turn Signal Lamp Bulb) and HELLA 7443 (Turn Signal Lamp Bulb). Click any part number to see every vehicle that part fits.
Brake Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Nautilus engines | 7443 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Incandescent21/5W | View on Amazon |
This table covers the bulbs in the stop lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
One part is listed for the 2021 Lincoln Nautilus — HELLA 7443.
Daytime Running Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 Nautilus engines | H15 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the bulbs used as daytime running lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
This group shows a single part: PHILIPS H15.
Daytime Running Light Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Nautilus engines | S2618 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Black | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 Nautilus engines | S2990 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 6 Terminal(s) | View on Amazon |
This table covers the sockets that hold a Daytime Running Light bulb. Typical signs include a flicker over bumps, melted plastic, or a bulb that will not stay seated. Dielectric grease on the contacts slows corrosion. Do not force a bulb into a heat-damaged socket.
2 Daytime Running Light Socket parts for the 2021 Lincoln Nautilus come from STANDARD MOTOR PRODUCTS. Every part fits both the 2.0L L4 Turbocharged and the 2.7L V6 Turbocharged.
Listed part numbers: STANDARD MOTOR PRODUCTS S2618 and STANDARD MOTOR PRODUCTS S2990.
Headlamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 Nautilus engines | HB128 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with High Intensity Discharge Headlampwith Adaptive Headlamps Bi-Xenon | View on Amazon |
This table covers the bulbs that light the headlamps. Typical signs include a dark lamp, a flicker over bumps, or a bulb that keeps failing on one side. Avoid touching a halogen capsule. Repeated failure in one socket is usually the socket or ground, not the bulb.
This group shows a single part: MOTORCRAFT HB128.
Headlamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 Nautilus engines | WPT971 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Leads: 6Color: Black | View on Amazon |
| MOTORCRAFT Fits: all 2021 Nautilus engines | WPT1731 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 16 CavityLeft and Right | View on Amazon |
| MOTORCRAFT Fits: all 2021 Nautilus engines | WPT1279 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Terminal: SilverLeads: 16 | View on Amazon |
This table covers the sockets that hold a headlamp bulb in the housing. Typical signs include a flicker over bumps, melted plastic, or a bulb that will not stay seated. Dielectric grease on the contacts slows corrosion. Do not force a bulb into a heat-damaged socket.
3 Headlamp Socket parts for the 2021 Lincoln Nautilus come from MOTORCRAFT. Every part fits both the 2.0L L4 Turbocharged and the 2.7L V6 Turbocharged.
This group includes MOTORCRAFT WPT971, MOTORCRAFT WPT1731 and MOTORCRAFT WPT1279.
Side Marker Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Nautilus engines | 2825 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
This table covers the bulbs in the side-marker lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
One part is listed for the 2021 Lincoln Nautilus — HELLA 2825.
Tail Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Nautilus engines | 2825 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Fits: all 2021 Nautilus engines | 7443 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Incandescent21/5W | View on Amazon |
This table covers the bulbs in the tail lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
2 Tail Lamp Bulb parts for the 2021 Lincoln Nautilus come from HELLA. Every part fits both the 2.0L L4 Turbocharged and the 2.7L V6 Turbocharged.
Listed part numbers: HELLA 2825 and HELLA 7443.
Tail Lamp Socket / Connector Plate
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: all 2021 Nautilus engines | 1P3366 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Tail Lamp Socket / Connector plates. Typical signs include warpage, cracks, or a plate that no longer locates the assembly. Confirm which plate the notes describe — backing plates, clutch plates and strike plates are different parts.
This group shows a single part: WELLS 1P3366.
Turn Signal Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: all 2021 Nautilus engines | 7440ALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AmberBase Type: W3X16D | View on Amazon |
| HELLA Fits: all 2021 Nautilus engines | 7444NALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: all 2021 Nautilus engines | 7443 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Incandescent21/5W | View on Amazon |
| HELLA Fits: all 2021 Nautilus engines | 7443A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: PK22S | View on Amazon |
| HELLA Fits: all 2021 Nautilus engines | 7443NA | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentNatural Amber | View on Amazon |
| SYLVANIA Fits: all 2021 Nautilus engines | 7440A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Amber | View on Amazon |
This table covers the bulbs in the turn-signal lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
6 Turn Signal Lamp Bulb parts are listed for the 2021 Lincoln Nautilus, from HELLA and SYLVANIA. SYLVANIA 7440ALL carries the "Popular" badge. All of them fit every engine offered in the 2021 Nautilus.
The Extended Life section lists 2 options from SYLVANIA and HELLA — grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. SYLVANIA 7440ALL is listed in this group.
The Standard Replacement section lists 4 options from HELLA and SYLVANIA — built to original-equipment specification. HELLA 7443 is listed in this group.
Part numbers include SYLVANIA 7440ALL, HELLA 7444NALL and HELLA 7443, among others listed above.
Turn Signal Lamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Nautilus engines | S2390 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector required | View on Amazon |
This table covers the sockets that hold a Turn Signal Lamp bulb. Typical signs include a flicker over bumps, melted plastic, or a bulb that will not stay seated. Dielectric grease on the contacts slows corrosion. Do not force a bulb into a heat-damaged socket.
One part is listed for the 2021 Lincoln Nautilus — STANDARD MOTOR PRODUCTS S2390.
Buying Electrical Bulb & Socket Parts for a 2021 Lincoln Nautilus
On this vehicle, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.
- You do not need to pick an engine: every electrical bulb & socket part on this page fits both the 2.0L L4 Turbocharged and the 2.7L V6 Turbocharged.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace bulbs in pairs so both sides age together, and put a smear of dielectric grease on the new socket contacts.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Turn Signal Lamp Bulb and Headlamp Socket .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2021 Lincoln Nautilus?
Our catalog currently lists 19 electrical bulb & socket parts for the 2021 Lincoln Nautilus across 10 subcategories and 6 brands, covering both the 2.0L L4 Turbocharged and the 2.7L V6 Turbocharged. Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2021 Lincoln Nautilus engines?
No. On this page every electrical bulb & socket part fits both the 2.0L L4 Turbocharged and the 2.7L V6 Turbocharged. You do not need to pick an engine to choose the right row — use the notes for position and trim.
What are the signs of electrical bulb & socket problems on a 2021 Lincoln Nautilus?
Common symptoms include a lamp that flickers over bumps, melted or discolored socket plastic, or bulbs that keep failing early on one side. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace bulbs in pairs so both sides age together, and put a smear of dielectric grease on the new socket contacts.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Lincoln Nautilus was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 Lincoln Nautilus?
Every part on this page already fits both the 2.0L L4 Turbocharged and the 2.7L V6 Turbocharged. Then repeated bulb failure in one position usually means a socket or ground problem, not bad bulbs — replace the socket rather than chase it. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Lincoln Nautilus
Electrical Bulb & Socket Parts for Other Lincoln Nautilus Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.