This page lists 25 electrical bulb & socket parts for the 2023 Lexus IS300, across 4 part types, covering both the 2.0L L4 Turbocharged and the 3.5L V6. Every part shows its brand, manufacturer part number and fitment notes.
The bulb and socket system on the 2023 Lexus IS300 covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. The largest groups are Step / Courtesy Light Bulb (12 parts), Trunk / Cargo Area Light Bulb (9 parts) and Turn Signal Lamp Bulb (3 parts). The other 1 part type covers the remaining 1 part.
The 2023 Lexus IS300 was sold with both the 2.0L L4 Turbocharged and the 3.5L V6. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2023 Lexus IS300 electrical bulb & socket parts are SYLVANIA (22 parts) and HELLA (3 parts). Quality grades include LED, Standard Replacement and Extended Life.
5 parts on this 2023 Lexus IS300 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including SYLVANIA 194LL (Step / Courtesy Light Bulb) and SYLVANIA 168LL (Trunk / Cargo Area Light Bulb). Click any part number to see every vehicle that part fits.
Door Panel Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.0L L4 Turbocharged | 168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
This group shows a single part: HELLA 168.
Step / Courtesy Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 2.0L L4 Turbocharged | 194LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long LifeBase Type: W2.1x9.2d | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long LifeBase Type: W2.1x9.2d | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168ST | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Cool WhiteSilver Star | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 194ST | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Color Temperature: 3200 KVSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168SL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LEDCool White | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 194BSL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LEDBlue | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 194SL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LEDCool White | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 194BLED | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | BlueZEVO | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 194LED | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | ZEVOCool White | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 2.0L L4 Turbocharged | 168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| SYLVANIA Popular Fits: 2.0L L4 Turbocharged | 194 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Base Type: W2.1x9.2dWattage: 3.80 W | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Base Type: W2.1x9.2dWattage: 4.90 W | 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.
12 Step / Courtesy Light Bulb parts are listed for the 2023 Lexus IS300, from SYLVANIA and HELLA. SYLVANIA 194LL carries the "Popular" badge.
The Extended Life section lists 2 options from SYLVANIA — grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. SYLVANIA 194LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section lists 2 options from SYLVANIA — grouped under the catalog's "Extra Bright (improved visibility, but shorter life)" designation — the notes column spells out what sets them apart. SYLVANIA 168ST is listed in this group.
In the LED (instant-on, long life, energy-saving) grade, SYLVANIA supplies 5 parts: grouped under the catalog's "LED (instant-on, long life, energy-saving)" designation — the notes column spells out what sets them apart. A representative part number is SYLVANIA 168SL.
The Standard Replacement section lists 3 options from SYLVANIA and HELLA — built to original-equipment specification. HELLA 168 is listed in this group.
Trunk / Cargo Area Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 2.0L L4 Turbocharged | 168LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long LifeBase Type: W2.1x9.2d | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168ST | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Cool WhiteSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168SL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LEDCool White | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168BLED | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | ZEVO | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168BSL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LED | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168LED | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | ZEVOCool White | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168RLED | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | ZEVO | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 168RSL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LEDRed | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 2.0L L4 Turbocharged | 168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
9 Trunk / Cargo Area Light Bulb parts for the 2023 Lexus IS300 come from SYLVANIA. The "Popular" part is SYLVANIA 168LL.
Extended Life: 1 part, from SYLVANIA. 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: 6 options from SYLVANIA. SYLVANIA 168SL is listed in this group.
Standard Replacement: 1 part, from SYLVANIA. A representative part number is SYLVANIA 168.
This group includes SYLVANIA 168LL, SYLVANIA 168ST and SYLVANIA 168SL and the remaining parts above.
Turn Signal Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 2.0L L4 Turbocharged | 7440ALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AmberBase Type: W3X16D | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.0L L4 Turbocharged | 7440 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W3X16D | View on Amazon |
| SYLVANIA Fits: 2.0L L4 Turbocharged | 7440A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
3 Turn Signal Lamp Bulb parts are listed for the 2023 Lexus IS300, from SYLVANIA and HELLA.
The Extended Life section: 1 option from SYLVANIA. SYLVANIA 7440ALL is listed in this group.
The Standard Replacement section: 2 options from HELLA and SYLVANIA. HELLA 7440 is listed in this group.
This group includes SYLVANIA 7440ALL, HELLA 7440 and SYLVANIA 7440A.
Buying Electrical Bulb & Socket Parts for a 2023 Lexus IS300
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: Step / Courtesy Light Bulb and Trunk / Cargo Area Light Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2023 Lexus IS300?
Our catalog currently lists 25 electrical bulb & socket parts for the 2023 Lexus IS300 across 4 subcategories and 2 brands, covering both the 2.0L L4 Turbocharged and the 3.5L V6. Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2023 Lexus IS300 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 2023 Lexus IS300?
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 2023 Lexus IS300 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 2023 Lexus IS300?
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 2023 Lexus IS300
Electrical Bulb & Socket Parts for Other Lexus IS300 Years
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