This page lists 22 electrical bulb & socket parts for the 2025 Lexus RC350, across 4 part types, covering the 3.5L V6 engine. Every part shows its brand, manufacturer part number and fitment notes.
The bulb and socket system on the 2025 Lexus RC350 covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. The largest groups are Trunk / Cargo Area Light Bulb (9 parts), Step / Courtesy Light Bulb (7 parts) and Back Up / Reverse Lamp Bulb (3 parts). The other 1 part type covers the remaining 3 parts.
Every part on this page is matched to the 3.5L V6 — the only engine offered in the 2025 Lexus RC350.
Every electrical bulb & socket part listed for the 2025 Lexus RC350 comes from SYLVANIA. Quality grades include LED, Extended Life and Standard Replacement.
4 parts on this 2025 Lexus RC350 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.
Back Up / Reverse Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 921LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | 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 |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| 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.
SYLVANIA supplies the 3 Back Up / Reverse Lamp Bulb parts for the 2025 Lexus RC350.
The Extended Life section lists 1 option from SYLVANIA — grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. SYLVANIA 921LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section lists 1 option 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 921ST is listed in this group.
The Standard Replacement section lists 1 option from SYLVANIA — built to original-equipment specification. SYLVANIA 921 is listed in this group.
This group includes SYLVANIA 921LL, SYLVANIA 921ST and SYLVANIA 921.
Step / Courtesy Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular | 194LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 194ST | 🇺🇸 US 🇨🇦 CA | Color Temperature: 3200 KVSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 194BSL | 🇺🇸 US 🇨🇦 CA | LEDBlue | View on Amazon |
| SYLVANIA | 194SL | 🇺🇸 US 🇨🇦 CA | LEDCool White | View on Amazon |
| SYLVANIA | 194BLED | 🇺🇸 US 🇨🇦 CA | BlueZEVO | View on Amazon |
| SYLVANIA | 194LED | 🇺🇸 US 🇨🇦 CA | ZEVOCool White | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular | 194 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.2dWattage: 3.80 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.
SYLVANIA supplies the 7 Step / Courtesy Light Bulb parts for the 2025 Lexus RC350. SYLVANIA 194LL carries the "Popular" badge.
The Extended Life section: 1 option from SYLVANIA. SYLVANIA 194LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section: 1 option from SYLVANIA. SYLVANIA 194ST is listed in this group.
In the LED (instant-on, long life, energy-saving) grade, SYLVANIA supplies 4 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 194BSL.
The Standard Replacement section: 1 option from SYLVANIA. SYLVANIA 194 is listed in this group.
Listed part numbers: SYLVANIA 194LL, SYLVANIA 194ST and SYLVANIA 194BSL, plus the other parts above.
Trunk / Cargo Area Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular | 168LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | 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 |
| SYLVANIA | 168BLED | 🇺🇸 US 🇨🇦 CA | ZEVO | View on Amazon |
| SYLVANIA | 168BSL | 🇺🇸 US 🇨🇦 CA | LED | View on Amazon |
| SYLVANIA | 168LED | 🇺🇸 US 🇨🇦 CA | ZEVOCool White | View on Amazon |
| SYLVANIA | 168RLED | 🇺🇸 US 🇨🇦 CA | ZEVO | View on Amazon |
| SYLVANIA | 168RSL | 🇺🇸 US 🇨🇦 CA | LEDRed | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular | 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.
9 Trunk / Cargo Area Light Bulb parts for the 2025 Lexus RC350 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 | 7440ALL | 🇺🇸 US 🇨🇦 CA | AmberBase Type: W3X16D | View on Amazon |
| SYLVANIA | 7444NALL | 🇺🇸 US 🇨🇦 CA | Long LifeAmber | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 7440A | 🇺🇸 US 🇨🇦 CA | 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.
SYLVANIA supplies the 3 Turn Signal Lamp Bulb parts for the 2025 Lexus RC350.
The Extended Life section: 2 options from SYLVANIA. SYLVANIA 7440ALL is listed in this group.
The Standard Replacement section: 1 option from SYLVANIA. SYLVANIA 7440A is listed in this group.
Part numbers include SYLVANIA 7440ALL, SYLVANIA 7444NALL and SYLVANIA 7440A.
Buying Electrical Bulb & Socket Parts for a 2025 Lexus RC350
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 3.5L V6 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: Trunk / Cargo Area Light Bulb and Step / Courtesy Light Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2025 Lexus RC350?
Our catalog currently lists 22 electrical bulb & socket parts for the 2025 Lexus RC350 across 4 subcategories and 1 brand, covering the 3.5L V6 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical bulb & socket problems on a 2025 Lexus RC350?
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 2025 Lexus RC350 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 2025 Lexus RC350?
Every part on this page is matched to the 3.5L V6 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 2025 Lexus RC350
Electrical Bulb & Socket Parts for Other Lexus RC350 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.