25 Electrical bulb & socket parts are listed for the 2021 Ram 4500, in 11 part types, covering both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 Ram 4500, 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 Headlamp Socket (7 parts), Back Up / Reverse Lamp Bulb (6 parts) and Glove Box Light Bulb (3 parts). The other 8 part types cover the remaining 9 parts.
The 2021 Ram 4500 was sold with both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. All 25 parts on this page fit every engine.
5 brands supply electrical bulb & socket parts for the 2021 Ram 4500, led by HELLA (12 parts), PHILIPS (6 parts) and STANDARD MOTOR PRODUCTS (4 parts), plus 2 more brands. Quality grades include Extended Life and Standard Replacement.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Ram 4500. 4 parts have it, including PHILIPS 1156LL (Back Up / Reverse Lamp Bulb) and STANDARD MOTOR PRODUCTS HP3835 (Headlamp Socket). Each part number opens a page with every vehicle that part fits.
Back Up / Reverse Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Popular Fits: all 2021 4500 engines | 1156LL | 🇺🇸 US 🇨🇦 CA | Longer Life | View on Amazon |
| HELLA Fits: all 2021 4500 engines | 921LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
| HELLA Fits: all 2021 4500 engines | DE3175LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: all 2021 4500 engines | 921 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Fits: all 2021 4500 engines | 223569031 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PG20/4 | View on Amazon |
| HELLA Fits: all 2021 4500 engines | 921NA | 🇺🇸 US 🇨🇦 CA | IncandescentNatural Amber | 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 for the 2021 Ram 4500 come from 2 brands — HELLA and PHILIPS. The "Popular" part is PHILIPS 1156LL. Every part fits both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged.
In the Extended Life grade, HELLA and PHILIPS supply 3 parts: grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. A representative part number is PHILIPS 1156LL.
In the Standard Replacement grade, HELLA supplies 3 parts: built to original-equipment specification. A representative part number is HELLA 921.
Part numbers include PHILIPS 1156LL, HELLA 921LL and HELLA DE3175LL, among others listed above.
Door Panel Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 4500 engines | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
This table covers the replacement bulbs for the Door Panel Light. 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 Ram 4500 — HELLA 2825.
Glove Box Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 4500 engines | 194LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 4500 engines | 194 | 🇺🇸 US 🇨🇦 CA | Brightness: 2.0 CPIncandescent | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 4500 engines | 226971211 | 🇺🇸 US 🇨🇦 CA | LEDSocket Type Bulb: W2.1x9.5 | View on Amazon |
This table covers the bulbs in the glove-box lamp. 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.
HELLA supplies the 3 Glove Box Light Bulb parts for the 2021 Ram 4500. All of them fit every engine offered in the 2021 4500.
The Extended Life section: 1 option from HELLA. HELLA 194LL is listed in this group.
The Standard Replacement section: 1 option from HELLA. HELLA 194 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Listed part numbers: HELLA 194LL, HELLA 194 and HELLA 226971211.
Headlamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 4500 engines | 9005 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: P20D | 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.
One part is listed for the 2021 Ram 4500 — HELLA 9005.
Headlamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: all 2021 4500 engines | HP3835 | 🇺🇸 US 🇨🇦 CA | HandypackConnector Shape: Oval | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular Fits: all 2021 4500 engines | S553 | 🇺🇸 US 🇨🇦 CA | Connector Shape: OvalContact Terminal Material: Metal | View on Amazon |
| ACDELCO Fits: all 2021 4500 engines | LS255 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| ACDELCO Fits: all 2021 4500 engines | PT2298 | 🇺🇸 US 🇨🇦 CA | GoldHeight (In): 1.5 in | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 4500 engines | HP3970 | 🇺🇸 US 🇨🇦 CA | Handypack | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 4500 engines | S524 | 🇺🇸 US 🇨🇦 CA | Weather Resistant: YES | View on Amazon |
| WALKER PRODUCTS Fits: all 2021 4500 engines | 2701125 | 🇺🇸 US 🇨🇦 CA | High Beam | 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.
7 Headlamp Socket parts are listed for the 2021 Ram 4500, from STANDARD MOTOR PRODUCTS, ACDELCO and WALKER PRODUCTS. STANDARD MOTOR PRODUCTS HP3835 carries the "Popular" badge. All of them fit every engine offered in the 2021 4500.
Part numbers include STANDARD MOTOR PRODUCTS HP3835, STANDARD MOTOR PRODUCTS S553 and ACDELCO LS255, among others listed above.
License Plate Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 4500 engines | 1157WLED | 🇺🇸 US 🇨🇦 CA | Ultinon LEDWhite | View on Amazon |
This table covers the bulbs that light the license plate. 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 1157WLED.
Map / Reading Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 4500 engines | 2122 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the bulbs in the map / reading 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 2122.
Parking Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 4500 engines | 7444NALL | 🇺🇸 US 🇨🇦 CA | Longer LifeNatural Amber | View on Amazon |
This table covers the bulbs in the parking 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 Ram 4500 — PHILIPS 7444NALL.
Roof Marker & Identification Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 4500 engines | 194NALL | 🇺🇸 US 🇨🇦 CA | Longer LifeNatural Amber | View on Amazon |
This table covers the replacement bulbs for the Roof Marker & Identification Light. 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 Ram 4500 — PHILIPS 194NALL.
Tail Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 4500 engines | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | 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.
One part is listed for the 2021 Ram 4500 — HELLA 2825.
Turn Signal Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 4500 engines | 7444NALL | 🇺🇸 US 🇨🇦 CA | Longer LifeNatural Amber | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 4500 engines | 223569031 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PG20/4 | 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 for the 2021 Ram 4500 come from 2 brands — PHILIPS and HELLA. Every part fits both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged.
Extended Life: 1 part, from PHILIPS. A representative part number is PHILIPS 7444NALL.
Standard Replacement: 1 part, from HELLA. A representative part number is HELLA 223569031.
Listed part numbers: PHILIPS 7444NALL and HELLA 223569031.
Buying Electrical Bulb & Socket Parts for a 2021 Ram 4500
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 6.4L V8 and the 6.7L L6 DIESEL 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: Headlamp Socket and Back Up / Reverse Lamp Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2021 Ram 4500?
Our catalog currently lists 25 electrical bulb & socket parts for the 2021 Ram 4500 across 11 subcategories and 5 brands, covering both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2021 Ram 4500 engines?
No. On this page every electrical bulb & socket part fits both the 6.4L V8 and the 6.7L L6 DIESEL 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 Ram 4500?
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 Ram 4500 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 Ram 4500?
Every part on this page already fits both the 6.4L V8 and the 6.7L L6 DIESEL 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 Ram 4500
Electrical Bulb & Socket Parts for Other Ram 4500 Years
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