This page lists 6 electrical bulb & socket parts for the 2021 Freightliner Cascadia, across 2 part types, covering all 6 engine options (11.9L DIESEL, 11.9L Turbocharged, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged and more). Every part shows its brand, manufacturer part number and fitment notes.
The bulb and socket system on the 2021 Freightliner Cascadia covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. All 6 listed parts are Fog / Driving Lamp Bulb (5 parts) and LED Bulb Adapter (1 part).
The 2021 Freightliner Cascadia was sold with 6 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
Every electrical bulb & socket part listed for the 2021 Freightliner Cascadia comes from WAGNER. Quality grades include Extra Bright, Extended Life and LED.
1 part on this 2021 Freightliner Cascadia page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — WAGNER 1255H11 (Fog / Driving Lamp Bulb). Click any part number to see every vehicle that part fits.
Fog / Driving Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: 11.9L DIESEL, 11.9L Turbocharged, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | 1255H11LL | 🇺🇸 US | Long Life | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: 11.9L DIESEL, 11.9L Turbocharged, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | H11BLX | 🇺🇸 US | BritelitePGJ19-2 Base | View on Amazon |
| WAGNER Fits: 11.9L DIESEL, 11.9L Turbocharged, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | H11TVX | 🇺🇸 US | Truview Plus1.733 Base | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: 11.9L DIESEL, 11.9L Turbocharged, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | H11LED | 🇺🇸 US | LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Popular Fits: 11.9L DIESEL, 11.9L Turbocharged, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | 1255H11 | 🇺🇸 US | Bulb Color: Clear | View on Amazon |
This table covers the bulbs in the fog and driving 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.
5 Fog / Driving Lamp Bulb parts for the 2021 Freightliner Cascadia come from WAGNER. The "Popular" part is WAGNER 1255H11.
In the Extended Life grade, WAGNER supplies 1 part: grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. A representative part number is WAGNER 1255H11LL.
In the Extra Bright (improved visibility, but shorter life) grade, WAGNER supplies 2 parts: grouped under the catalog's "Extra Bright (improved visibility, but shorter life)" designation — the notes column spells out what sets them apart. A representative part number is WAGNER H11BLX.
The LED (instant-on, long life, energy-saving) section lists 1 option from WAGNER — grouped under the catalog's "LED (instant-on, long life, energy-saving)" designation — the notes column spells out what sets them apart. WAGNER H11LED is listed in this group.
In the Standard Replacement grade, WAGNER supplies 1 part: built to original-equipment specification. A representative part number is WAGNER 1255H11.
This group includes WAGNER 1255H11, WAGNER 1255H11LL and WAGNER H11BLX and the remaining parts above.
LED Bulb Adapter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: 11.9L DIESEL, 11.9L Turbocharged, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged, 15.6L L6 DIESEL Turbocharged | CBH8H11H16 | 🇺🇸 US | For H8 / H11 / H16 Bulb | View on Amazon |
This table covers the LED Bulb adapters.
This group shows a single part: WAGNER CBH8H11H16.
Buying Electrical Bulb & Socket Parts for a 2021 Freightliner Cascadia
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: Fog / Driving Lamp Bulb and LED Bulb Adapter .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2021 Freightliner Cascadia?
Our catalog currently lists 6 electrical bulb & socket parts for the 2021 Freightliner Cascadia across 2 subcategories and 1 brand, covering all 6 engine options (11.9L DIESEL, 11.9L Turbocharged, 12.8L L6 DIESEL Turbocharged, 14.8L L6 DIESEL Turbocharged and more). Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2021 Freightliner Cascadia 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 Freightliner Cascadia?
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 Freightliner Cascadia 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 Freightliner Cascadia?
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 Freightliner Cascadia
Electrical Bulb & Socket Parts for Other Freightliner Cascadia Years
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