10 Electrical bulb & socket parts are listed for the 2021 Infiniti Q50, in 3 part types, covering both the 3.0L V6 Turbocharged and the 3.5L V6 ELECTRIC/GAS. Each one has a brand, a manufacturer part number and notes that say where it fits.
The bulb and socket system on the 2021 Infiniti Q50 covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. All 10 listed parts are Turn Signal Lamp Bulb (5 parts), Back Up / Reverse Lamp Bulb (4 parts) and Vanity Mirror / Sun Visor Light Bulb (1 part).
The 2021 Infiniti Q50 was sold with both the 3.0L V6 Turbocharged and the 3.5L V6 ELECTRIC/GAS. All 10 parts on this page fit every engine.
The most listed brands for 2021 Infiniti Q50 electrical bulb & socket parts are HELLA (9 parts) and PHILIPS (1 part). Quality grades include Standard Replacement and Extended Life.
1 part on this 2021 Infiniti Q50 page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — HELLA 7443 (Turn Signal 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 |
|---|---|---|---|---|
| HELLA Fits: all 2021 Q50 engines | 921LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
| HELLA Fits: all 2021 Q50 engines | DE3175LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Q50 engines | 921 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Fits: all 2021 Q50 engines | 921NA | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
HELLA supplies the 4 Back Up / Reverse Lamp Bulb parts for the 2021 Infiniti Q50. All of them fit every engine offered in the 2021 Q50.
The Extended Life section lists 2 options from HELLA — grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. HELLA 921LL is listed in this group.
The Standard Replacement section lists 2 options from HELLA — built to original-equipment specification. HELLA 921 is listed in this group.
Listed part numbers: HELLA 921LL, HELLA DE3175LL and HELLA 921, plus the other parts above.
Turn Signal Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Q50 engines | 7440NALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: all 2021 Q50 engines | 7443 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Incandescent21/5W | View on Amazon |
| HELLA Fits: all 2021 Q50 engines | 7443A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: PK22S | View on Amazon |
| HELLA Fits: all 2021 Q50 engines | 7440NA | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentNatural Amber | View on Amazon |
| HELLA Fits: all 2021 Q50 engines | 7443NA | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentNatural 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.
HELLA supplies the 5 Turn Signal Lamp Bulb parts for the 2021 Infiniti Q50. HELLA 7443 carries the "Popular" badge. All of them fit every engine offered in the 2021 Q50.
The Extended Life section: 1 option from HELLA. HELLA 7440NALL is listed in this group.
The Standard Replacement section: 4 options from HELLA. HELLA 7443 is listed in this group.
This group includes HELLA 7443, HELLA 7440NALL and HELLA 7443A and the remaining parts above.
Vanity Mirror / Sun Visor Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 Q50 engines | 37LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Longer Life | View on Amazon |
This table covers the replacement bulbs for the Vanity Mirror / Sun Visor 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.
This group shows a single part: PHILIPS 37LL.
Buying Electrical Bulb & Socket Parts for a 2021 Infiniti Q50
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 3.0L V6 Turbocharged and the 3.5L V6 ELECTRIC/GAS.
- 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 Back Up / Reverse Lamp Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2021 Infiniti Q50?
Our catalog currently lists 10 electrical bulb & socket parts for the 2021 Infiniti Q50 across 3 subcategories and 2 brands, covering both the 3.0L V6 Turbocharged and the 3.5L V6 ELECTRIC/GAS. Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2021 Infiniti Q50 engines?
No. On this page every electrical bulb & socket part fits both the 3.0L V6 Turbocharged and the 3.5L V6 ELECTRIC/GAS. 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 Infiniti Q50?
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 Infiniti Q50 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 Infiniti Q50?
Every part on this page already fits both the 3.0L V6 Turbocharged and the 3.5L V6 ELECTRIC/GAS. 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 Infiniti Q50
Electrical Bulb & Socket Parts for Other Infiniti Q50 Years
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