24 Electrical bulb & socket parts are listed for the 2021 Acura Ilx, in 9 part types, covering the 2.4L L4 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The bulb and socket system on the 2021 Acura Ilx covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. The largest groups are Back Up / Reverse Lamp Bulb (7 parts), License Plate Lamp Bulb (6 parts) and Tail Lamp Bulb (3 parts). The other 6 part types cover the remaining 8 parts.
The 2021 Acura Ilx came with a single engine, the 2.4L L4, and every part is verified against it.
3 brands supply electrical bulb & socket parts for the 2021 Acura Ilx, led by HELLA (12 parts), SYLVANIA (7 parts) and WAGNER (5 parts). Quality grades include Standard Replacement, Extended Life and Extra Bright.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Acura Ilx. 4 parts have it, including SYLVANIA 921LL (Back Up / Reverse Lamp Bulb) and SYLVANIA 168LL (License Plate Lamp Bulb). 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 |
|---|---|---|---|---|
| SYLVANIA Popular | 921LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | View on Amazon |
| WAGNER | 921LL | 🇺🇸 US 🇨🇦 CA | Long LifeWedge Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 921ST | 🇺🇸 US 🇨🇦 CA | Cool WhiteSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER | 921WLED | 🇺🇸 US 🇨🇦 CA | LEDWhite | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Popular | 921 | 🇺🇸 US 🇨🇦 CA | Bulb Type: T-5 Bulb 5/8 (16mm) DiameterVoltage: 12.800 Volts (Direct Current) | View on Amazon |
| HELLA | 7440 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W3X16D | View on Amazon |
| SYLVANIA | 921 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.2dWattage: 18.00 W | 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.
7 Back Up / Reverse Lamp Bulb parts for the 2021 Acura Ilx come from 3 brands — SYLVANIA, WAGNER and HELLA. The "Popular" part is SYLVANIA 921LL.
In the Extended Life grade, SYLVANIA and WAGNER supply 2 parts: grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. A representative part number is SYLVANIA 921LL.
In the Extra Bright (improved visibility, but shorter life) grade, SYLVANIA supplies 1 part: 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 SYLVANIA 921ST.
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 921WLED is listed in this group.
In the Standard Replacement grade, WAGNER, HELLA and SYLVANIA supply 3 parts: built to original-equipment specification. A representative part number is WAGNER 921.
This group includes SYLVANIA 921LL and SYLVANIA 921ST and the remaining parts above.
Brake Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 7528 | 🇺🇸 US 🇨🇦 CA | 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.
This group shows a single part: HELLA 7528.
Dome Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 168LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 168 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
This table covers the bulbs in the dome 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.
2 Dome Light Bulb parts for the 2021 Acura Ilx come from HELLA.
Extended Life: 1 part, from HELLA. A representative part number is HELLA 168LL.
Standard Replacement: 1 part, from HELLA. A representative part number is HELLA 168.
Listed part numbers: HELLA 168LL and HELLA 168.
Fog / Driving Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | H11 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 or Socket Type Bulb: PGJY19-2 | 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.
One part is listed for the 2021 Acura Ilx — HELLA H11.
Headlamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 9005 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: P20D | View on Amazon |
| HELLA | H11 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 or Socket Type Bulb: PGJY19-2 | 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.
HELLA supplies both parts for the 2021 Acura Ilx.
Part numbers include HELLA 9005 and HELLA H11.
License Plate Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular | 168LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | View on Amazon |
| WAGNER | 168LL | 🇺🇸 US 🇨🇦 CA | Long LifeWedge Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 168ST | 🇺🇸 US 🇨🇦 CA | Cool WhiteSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 168SL | 🇺🇸 US 🇨🇦 CA | LEDCool White | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Popular | 168 | 🇺🇸 US 🇨🇦 CA | Wedge Base4.900 Watt | View on Amazon |
| SYLVANIA | 168 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.2dWattage: 4.90 W | 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.
6 License Plate Lamp Bulb parts for the 2021 Acura Ilx come from 2 brands — SYLVANIA and WAGNER. The "Popular" part is SYLVANIA 168LL.
Extended Life: 2 parts, from SYLVANIA and WAGNER. A representative part number is SYLVANIA 168LL.
Extra Bright (improved visibility, but shorter life): 1 part, from SYLVANIA. A representative part number is SYLVANIA 168ST.
The LED (instant-on, long life, energy-saving) section: 1 option from SYLVANIA. SYLVANIA 168SL is listed in this group.
Standard Replacement: 2 parts, from WAGNER and SYLVANIA. A representative part number is WAGNER 168.
Listed part numbers: SYLVANIA 168LL and SYLVANIA 168ST, plus the other parts above.
Side Marker Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 2825 | 🇺🇸 US 🇨🇦 CA | 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.
This group shows a single part: HELLA 2825.
Tail Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA | 7528 | 🇺🇸 US 🇨🇦 CA | Incandescent21/5W | View on Amazon |
| HELLA | 7440 | 🇺🇸 US 🇨🇦 CA | 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.
HELLA supplies the 3 Tail Lamp Bulb parts for the 2021 Acura Ilx.
Part numbers include HELLA 2825, HELLA 7528 and HELLA 7440.
Turn Signal Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 7528 | 🇺🇸 US 🇨🇦 CA | Incandescent21/5W | 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.
This group shows a single part: HELLA 7528.
Buying Electrical Bulb & Socket Parts for a 2021 Acura Ilx
On this vehicle, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.
- Confirm you have the 2.4L L4 engine — every part on this page is matched to it.
- 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 License Plate Lamp Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2021 Acura Ilx?
Our catalog currently lists 24 electrical bulb & socket parts for the 2021 Acura Ilx across 9 subcategories and 3 brands, covering the 2.4L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical bulb & socket problems on a 2021 Acura Ilx?
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 Acura Ilx 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 Acura Ilx?
Every part on this page is matched to the 2.4L L4 engine. 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 Acura Ilx
Electrical Bulb & Socket Parts for Other Acura Ilx 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.