This page lists 24 electrical bulb & socket parts for the 2018 Acura RLX, across 7 part types, covering both the 3.5L V6 and the 3.5L V6 ELECTRIC/GAS. Every part shows its brand, manufacturer part number and fitment notes.
On the 2018 Acura RLX, 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 Trunk / Cargo Area Light Bulb (10 parts), Door Panel Light Bulb (5 parts) and Step / Courtesy Light Bulb (3 parts). The other 4 part types cover the remaining 6 parts.
The 2018 Acura RLX was sold with both the 3.5L V6 and the 3.5L V6 ELECTRIC/GAS. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2018 Acura RLX electrical bulb & socket parts are HELLA (12 parts), SYLVANIA (6 parts) and WAGNER (5 parts), plus 1 more brand. Quality grades include Standard Replacement, Extended Life and LED.
3 parts on this 2018 Acura RLX page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including HELLA 158 (Door Panel Light Bulb) and HELLA 168 (Trunk / Cargo Area Light Bulb). Click any part number to see every vehicle that part fits.
Back Up / Reverse Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.5L V6 ELECTRIC/GAS | 921 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | 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.
One part is listed for the 2018 Acura RLX — HELLA 921.
Door Panel Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.5L V6 ELECTRIC/GAS | 158LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | View on Amazon |
| WAGNER Fits: 3.5L V6 ELECTRIC/GAS | 158LL | 🇺🇸 US 🇨🇦 CA | Long Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 3.5L V6 ELECTRIC/GAS | 158 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| SYLVANIA Fits: 3.5L V6 ELECTRIC/GAS | 158 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WAGNER Fits: 3.5L V6 ELECTRIC/GAS | 158 | 🇺🇸 US 🇨🇦 CA | Wedge Base3.360 Watt | 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.
5 Door Panel Light Bulb parts for the 2018 Acura RLX come from 3 brands — SYLVANIA, WAGNER and HELLA. The "Popular" part is HELLA 158.
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 158LL.
In the Standard Replacement grade, HELLA, SYLVANIA and WAGNER supply 3 parts: built to original-equipment specification. A representative part number is HELLA 158.
Listed part numbers: HELLA 158 and SYLVANIA 158LL, plus the other parts above.
Parking Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.5L V6 ELECTRIC/GAS | 1157NA | 🇺🇸 US 🇨🇦 CA | IncandescentNatural 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.
This group shows a single part: HELLA 1157NA.
Side Marker Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.5L V6 ELECTRIC/GAS | 168LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.5L V6 ELECTRIC/GAS | 168 | 🇺🇸 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.
HELLA supplies both parts for the 2018 Acura RLX.
The Extended Life section: 1 option from HELLA. HELLA 168LL is listed in this group.
The Standard Replacement section: 1 option from HELLA. HELLA 168 is listed in this group.
This group includes HELLA 168LL and HELLA 168.
Step / Courtesy Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.5L V6 ELECTRIC/GAS | 158 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Fits: 3.5L V6 ELECTRIC/GAS | 158A | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Fits: 3.5L V6 ELECTRIC/GAS | 226971101 | 🇺🇸 US 🇨🇦 CA | LEDSocket Type Bulb: W2.1x9.5 | View on Amazon |
This table covers the bulbs in the step and courtesy 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 Step / Courtesy Light Bulb parts for the 2018 Acura RLX.
Part numbers include HELLA 158, HELLA 158A and HELLA 226971101.
Trunk / Cargo Area Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.5L V6 ELECTRIC/GAS | 168LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
| SYLVANIA Fits: 3.5L V6 ELECTRIC/GAS | 168LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | View on Amazon |
| WAGNER Fits: 3.5L V6 ELECTRIC/GAS | 168LL | 🇺🇸 US 🇨🇦 CA | Long LifeWedge Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.5L V6 ELECTRIC/GAS | 168ST | 🇺🇸 US 🇨🇦 CA | Cool WhiteSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 3.5L V6 ELECTRIC/GAS | 168SL | 🇺🇸 US 🇨🇦 CA | LEDCool White | View on Amazon |
| WAGNER Fits: 3.5L V6 ELECTRIC/GAS | T10LED | 🇺🇸 US 🇨🇦 CA | Tru View PLUS LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 3.5L V6 ELECTRIC/GAS | 168 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| WAGNER Popular Fits: 3.5L V6 ELECTRIC/GAS | 168 | 🇺🇸 US 🇨🇦 CA | Wedge Base4.900 Watt | View on Amazon |
| GM GENUINE Fits: 3.5L V6 ELECTRIC/GAS | L168 | 🇺🇸 US 🇨🇦 CA | Bulb Technology: IncandescentHeight: 2 in | View on Amazon |
| SYLVANIA Fits: 3.5L V6 ELECTRIC/GAS | 168 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.2dWattage: 4.90 W | View on Amazon |
This table covers the bulbs in the trunk or cargo-area 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.
10 Trunk / Cargo Area Light Bulb parts for the 2018 Acura RLX come from 4 brands — SYLVANIA, WAGNER, HELLA and 1 other brand. The "Popular" part is HELLA 168.
Extended Life: 3 parts, from HELLA, SYLVANIA and WAGNER. A representative part number is HELLA 168LL.
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 168ST.
The LED (instant-on, long life, energy-saving) section lists 2 options from SYLVANIA and WAGNER — grouped under the catalog's "LED (instant-on, long life, energy-saving)" designation — the notes column spells out what sets them apart. SYLVANIA 168SL is listed in this group.
Standard Replacement: 4 parts, from HELLA, WAGNER, GM GENUINE and 1 other brand. A representative part number is HELLA 168.
Turn Signal Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.5L V6 ELECTRIC/GAS | 7440LL | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W3X16D | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 3.5L V6 ELECTRIC/GAS | 1157NA | 🇺🇸 US 🇨🇦 CA | 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 both parts for the 2018 Acura RLX.
The Extended Life section: 1 option from HELLA. HELLA 7440LL is listed in this group.
The Standard Replacement section: 1 option from HELLA. HELLA 1157NA is listed in this group.
Part numbers include HELLA 7440LL and HELLA 1157NA.
Buying Electrical Bulb & Socket Parts for a 2018 Acura RLX
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: Trunk / Cargo Area Light Bulb and Door Panel Light Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2018 Acura RLX?
Our catalog currently lists 24 electrical bulb & socket parts for the 2018 Acura RLX across 7 subcategories and 4 brands, covering both the 3.5L V6 and the 3.5L V6 ELECTRIC/GAS. Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2018 Acura RLX 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 2018 Acura RLX?
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 2018 Acura RLX 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 2018 Acura RLX?
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 2018 Acura RLX
Electrical Bulb & Socket Parts for Other Acura RLX Years
Switch vehicle or jump to a subcategory
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.