The 2021 Ford Bronco has 16 electrical bulb & socket parts with verified fitment on this page — 6 part types and 5 brands, covering all 4 engine options (1.5L L3 Turbocharged, 2.0L L4 Turbocharged, 2.3L L4 Turbocharged and 2.7L V6 Turbocharged). Each part includes a manufacturer part number and application notes.
On the 2021 Ford Bronco, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. 12 parts of the 16 listed are Back Up / Reverse Lamp Bulb (6 parts), Brake Light Bulb (4 parts) and Headlamp Socket (2 parts). The other 3 part types cover the remaining 4 parts.
The 2021 Ford Bronco was sold with 4 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2021 Ford Bronco electrical bulb & socket parts are SYLVANIA (7 parts), PHILIPS (4 parts) and HELLA (2 parts), plus 2 more brands. Quality grades include Standard Replacement, Extended Life and Extra Bright.
1 part on this 2021 Ford Bronco page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — SYLVANIA 7440LL (Back Up / Reverse Lamp Bulb). Click any part number to see every vehicle that part fits.
Back Up / Reverse Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 2.0L L4 Turbocharged | 7440LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long LifeBase Type: W3X16D | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 2.0L L4 Turbocharged | 7440ST | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Cool WhiteSilver Star | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.0L L4 Turbocharged | 7440 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W3X16D | View on Amazon |
| PHILIPS Fits: 2.0L L4 Turbocharged | WT21W | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 7440 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Base Type: W3X16DWattage: 25.00 W | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: 2.3L L4 Turbocharged, 2.7L V6 Turbocharged | WT21W | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the bulbs in the reverse 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 Back Up / Reverse Lamp Bulb parts are listed for the 2021 Ford Bronco, from SYLVANIA, PHILIPS and HELLA. SYLVANIA 7440LL carries the "Popular" badge.
The Extended Life section lists 1 option from SYLVANIA — grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. SYLVANIA 7440LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section lists 1 option from SYLVANIA — grouped under the catalog's "Extra Bright (improved visibility, but shorter life)" designation — the notes column spells out what sets them apart. SYLVANIA 7440ST is listed in this group.
The Standard Replacement section lists 3 options from HELLA, PHILIPS and SYLVANIA — built to original-equipment specification. HELLA 7440 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Part numbers include SYLVANIA 7440LL, SYLVANIA 7440ST and HELLA 7440, among others listed above.
Brake Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 2.0L L4 Turbocharged | 3157LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Base Type: W2.5x16qLong Life | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 2.0L L4 Turbocharged | 3157ST | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Silver StarCool White | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: 2.0L L4 Turbocharged | 3157RLED | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Ultinon LEDRed | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 2.0L L4 Turbocharged | 3157 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Base Type: W2.5x16qWattage: 27.00 W | 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.
4 Brake Light Bulb parts are listed for the 2021 Ford Bronco, from SYLVANIA and PHILIPS.
The Extended Life section: 1 option from SYLVANIA. SYLVANIA 3157LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section: 1 option from SYLVANIA. SYLVANIA 3157ST is listed in this group.
In the LED (instant-on, long life, energy-saving) grade, PHILIPS supplies 1 part: grouped under the catalog's "LED (instant-on, long life, energy-saving)" designation — the notes column spells out what sets them apart. A representative part number is PHILIPS 3157RLED.
The Standard Replacement section: 1 option from SYLVANIA. SYLVANIA 3157 is listed in this group.
Listed part numbers: SYLVANIA 3157LL, SYLVANIA 3157ST and PHILIPS 3157RLED, plus the other parts above.
Fog / Driving Lamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged, 2.7L V6 Turbocharged | S3003 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the sockets that hold a Fog / Driving 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S3003.
Headlamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: 2.0L L4 Turbocharged | WPT1731 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 16 CavityLeft and Right | View on Amazon |
| MOTORCRAFT Fits: 2.0L L4 Turbocharged, 2.3L L4 Turbocharged, 2.7L V6 Turbocharged | WPT1279 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | RH and LeftTerminal: Silver | 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.
2 Headlamp Socket parts for the 2021 Ford Bronco come from MOTORCRAFT.
Part numbers include MOTORCRAFT WPT1731 and MOTORCRAFT WPT1279.
Tail Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.0L L4 Turbocharged | 7440 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W3X16D | 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.
This group shows a single part: HELLA 7440.
Turn Signal Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: 2.0L L4 Turbocharged | 921NALLB2 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Longer LifeNatural Amber | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 921NALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long LifeAmber | 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.
2 Turn Signal Lamp Bulb parts are listed for the 2021 Ford Bronco, from PHILIPS and SYLVANIA.
Part numbers include PHILIPS 921NALLB2 and SYLVANIA 921NALL.
Buying Electrical Bulb & Socket Parts for a 2021 Ford Bronco
On this vehicle, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.
- Match the engine first. Every electrical bulb & socket part here is engine-specific; each row shows which engine(s) it fits.
- 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: Back Up / Reverse Lamp Bulb and Brake Light Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2021 Ford Bronco?
Our catalog currently lists 16 electrical bulb & socket parts for the 2021 Ford Bronco across 6 subcategories and 5 brands, covering all 4 engine options (1.5L L3 Turbocharged, 2.0L L4 Turbocharged, 2.3L L4 Turbocharged and 2.7L V6 Turbocharged). Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2021 Ford Bronco engines?
Yes. Every electrical bulb & socket part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical bulb & socket problems on a 2021 Ford Bronco?
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 Ford Bronco 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 Ford Bronco?
First match the engine — each row shows which engine(s) the part fits. 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 Ford Bronco
Electrical Bulb & Socket Parts for Other Ford Bronco 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.