This page lists 11 electrical bulb & socket parts for the 2021 Toyota Prius Prime, across 4 part types, covering the 1.8L L4 ELECTRIC/GAS engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2021 Toyota Prius Prime, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. 10 parts of the 11 listed are Back Up / Reverse Lamp Bulb (6 parts), Map / Reading Light Bulb (2 parts) and Parking Lamp Bulb (2 parts). The other 1 part type covers the remaining 1 part.
Every part on this page is matched to the 1.8L L4 ELECTRIC/GAS — the only engine offered in the 2021 Toyota Prius Prime.
The most listed brands for 2021 Toyota Prius Prime electrical bulb & socket parts are WAGNER (5 parts), SYLVANIA (3 parts) and PHILIPS (3 parts). Quality grades include Standard Replacement, Extended Life and LED.
2 parts on this 2021 Toyota Prius Prime page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including SYLVANIA 921LL (Back Up / Reverse Lamp Bulb) and WAGNER 921 (Back Up / Reverse 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 |
|---|---|---|---|---|
| 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 |
| 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.
6 Back Up / Reverse Lamp Bulb parts are listed for the 2021 Toyota Prius Prime, from SYLVANIA and WAGNER. SYLVANIA 921LL carries the "Popular" badge.
The Extended Life section lists 2 options from SYLVANIA and WAGNER — 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.
In the LED (instant-on, long life, energy-saving) grade, WAGNER supplies 1 part: 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 WAGNER 921WLED.
The Standard Replacement section lists 2 options from WAGNER and SYLVANIA — built to original-equipment specification. WAGNER 921 is listed in this group.
Listed part numbers: SYLVANIA 921LL and SYLVANIA 921ST, plus the other parts above.
Map / Reading Light Bulb
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS | 194RLED | 🇺🇸 US 🇨🇦 CA | Ultinon LEDRed | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS | 12961 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the bulbs in the map / reading 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.
PHILIPS supplies both parts for the 2021 Toyota Prius Prime.
LED (instant-on, long life, energy-saving): 1 part, from PHILIPS. A representative part number is PHILIPS 194RLED.
The Standard Replacement section: 1 option from PHILIPS. PHILIPS 12961 is listed in this group.
Part numbers include PHILIPS 194RLED and PHILIPS 12961.
Parking Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER | 17177LL | 🇺🇸 US 🇨🇦 CA | Long LifeW2.1x9.5d Base | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER | 17177 | 🇺🇸 US 🇨🇦 CA | W2.1x9.5d Base5.000 Watt | 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.
2 Parking Lamp Bulb parts for the 2021 Toyota Prius Prime come from WAGNER.
Extended Life: 1 part, from WAGNER. A representative part number is WAGNER 17177LL.
Standard Replacement: 1 part, from WAGNER. A representative part number is WAGNER 17177.
Listed part numbers: WAGNER 17177LL and WAGNER 17177.
Trunk / Cargo Area Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS | 194RLED | 🇺🇸 US 🇨🇦 CA | Ultinon LEDRed | 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.
This group shows a single part: PHILIPS 194RLED.
Buying Electrical Bulb & Socket Parts for a 2021 Toyota Prius Prime
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 1.8L L4 ELECTRIC/GAS 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 Map / Reading Light Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2021 Toyota Prius Prime?
Our catalog currently lists 11 electrical bulb & socket parts for the 2021 Toyota Prius Prime across 4 subcategories and 3 brands, covering the 1.8L L4 ELECTRIC/GAS engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical bulb & socket problems on a 2021 Toyota Prius Prime?
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 Toyota Prius Prime 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 Toyota Prius Prime?
Every part on this page is matched to the 1.8L L4 ELECTRIC/GAS 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 Toyota Prius Prime
Electrical Bulb & Socket Parts for Other Toyota Prius Prime 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.