49 Electrical bulb & socket parts are listed for the 2021 Toyota Highlander, in 14 part types, covering both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 Toyota Highlander, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. 18 parts of the 49 listed are Headlamp Bulb (8 parts), Back Up / Reverse Lamp Bulb (5 parts) and Daytime Running Light Bulb (5 parts). The other 11 part types cover the remaining 31 parts.
The 2021 Toyota Highlander was sold with both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6. All 49 parts on this page fit every engine.
The most listed brands for 2021 Toyota Highlander electrical bulb & socket parts are WAGNER (22 parts), HELLA (16 parts) and PHILIPS (10 parts), plus 1 more brand. Quality grades include Standard Replacement, Extended Life and Extra Bright.
5 parts on this 2021 Toyota Highlander page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including HELLA 921 (Back Up / Reverse Lamp Bulb) and HELLA 9005 (Daytime Running 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 |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 921LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 921LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long LifeWedge Base | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: all 2021 Highlander engines | 921WLED | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LEDWhite | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: all 2021 Highlander engines | 921 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 921 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Bulb Type: T-5 Bulb 5/8 (16mm) DiameterVoltage: 12.800 Volts (Direct Current) | 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.
5 Back Up / Reverse Lamp Bulb parts are listed for the 2021 Toyota Highlander, from WAGNER and HELLA. HELLA 921 carries the "Popular" badge. All of them fit every engine offered in the 2021 Highlander.
The Extended Life section lists 2 options from HELLA and WAGNER — grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. HELLA 921LL 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 HELLA and WAGNER — built to original-equipment specification. HELLA 921 is listed in this group.
Listed part numbers: HELLA 921, HELLA 921LL and WAGNER 921WLED, plus the other parts above.
Daytime Running Light Bulb
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: all 2021 Highlander engines | 9005TVX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HID Look | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 9005BLX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long Life80% More Light | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: all 2021 Highlander engines | 9005 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HalogenSocket Type Bulb: P20D | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 9005 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Voltage: 12.800 Volts (Direct Current) | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 9005L | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long Life | View on Amazon |
This table covers the bulbs used as daytime running 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.
5 Daytime Running Light Bulb parts for the 2021 Toyota Highlander come from 2 brands — WAGNER and HELLA. The "Popular" part is HELLA 9005. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.
In the Extra Bright (improved visibility, but shorter life) grade, WAGNER supplies 2 parts: 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 WAGNER 9005TVX.
Standard Replacement: 3 parts, from WAGNER and HELLA. A representative part number is HELLA 9005.
Part numbers include HELLA 9005, WAGNER 9005TVX and WAGNER 9005BLX, among others listed above.
Dome Light Bulb
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 Highlander engines | 194RLED | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Ultinon LEDRed | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 Highlander engines | 12961 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front | 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.
PHILIPS supplies both parts for the 2021 Toyota Highlander. All of them fit every engine offered in the 2021 Highlander.
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.
Door Panel Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 168LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 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.
2 Door Panel Light Bulb parts for the 2021 Toyota Highlander come from HELLA. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.
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.
This group includes HELLA 168LL and HELLA 168.
Fog / Driving Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | H11 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HalogenSocket Type Bulb: PGJ19-2 or Socket Type Bulb: PGJY19-2 | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 1219H16 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front | 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.
2 Fog / Driving Lamp Bulb parts for the 2021 Toyota Highlander come from 2 brands — HELLA and WAGNER. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.
This group includes HELLA H11 and WAGNER 1219H16.
Headlamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: all 2021 Highlander engines | 1255H11LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long Life | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: all 2021 Highlander engines | 9005TVX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HID Look | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 9005BLX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long Life80% More Light | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | H11BLX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | BritelitePGJ19-2 Base | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | H11TVX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Truview Plus1.733 Base | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Popular Fits: all 2021 Highlander engines | 9005 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Voltage: 12.800 Volts (Direct Current) | View on Amazon |
| WAGNER Popular Fits: all 2021 Highlander engines | 1255H11 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Bulb Color: Clear | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 9005L | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long Life | 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.
8 Headlamp Bulb parts for the 2021 Toyota Highlander come from WAGNER. The "Popular" part is WAGNER 9005. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.
Extended Life: 1 part, from WAGNER. A representative part number is WAGNER 1255H11LL.
Extra Bright (improved visibility, but shorter life): 4 parts, from WAGNER. A representative part number is WAGNER 9005TVX.
Standard Replacement: 3 parts, from WAGNER. A representative part number is WAGNER 9005.
This group includes WAGNER 9005, WAGNER 1255H11LL and WAGNER 9005TVX and the remaining parts above.
LED Bulb Adapter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: all 2021 Highlander engines | CB900590069012 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LEDFor 9005 / 9006 / 9012 Bulb | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | CBH8H11H16 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | For H8 / H11 / H16 Bulb | View on Amazon |
This table covers the LED Bulb adapters.
2 LED Bulb Adapter parts for the 2021 Toyota Highlander come from WAGNER. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.
This group includes WAGNER CB900590069012 and WAGNER CBH8H11H16.
License Plate Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 168LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| PHILIPS Fits: all 2021 Highlander engines | 12961 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
3 License Plate Lamp Bulb parts are listed for the 2021 Toyota Highlander, from HELLA and PHILIPS. All of them fit every engine offered in the 2021 Highlander.
The Extended Life section: 1 option from HELLA. HELLA 168LL is listed in this group.
The Standard Replacement section: 2 options from HELLA and PHILIPS. HELLA 168 is listed in this group.
This group includes HELLA 168LL, HELLA 168 and PHILIPS 12961.
Map / Reading Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 168LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 Highlander engines | 194RLED | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Ultinon LEDRed | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| PHILIPS Fits: all 2021 Highlander engines | 12961 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
4 Map / Reading Light Bulb parts are listed for the 2021 Toyota Highlander, from HELLA and PHILIPS. All of them fit every engine offered in the 2021 Highlander.
The Extended Life section: 1 option from HELLA. HELLA 168LL is listed in this group.
LED (instant-on, long life, energy-saving): 1 part, from PHILIPS. A representative part number is PHILIPS 194RLED.
The Standard Replacement section: 2 options from HELLA and PHILIPS. HELLA 168 is listed in this group.
This group includes HELLA 168LL, PHILIPS 194RLED and HELLA 168 and the remaining parts above.
Parking Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 Highlander engines | 7444NALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Longer LifeNatural Amber | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 7444NALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long LifeNatural Amber | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Fits: all 2021 Highlander engines | 7444NA | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Natural 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.
3 Parking Lamp Bulb parts for the 2021 Toyota Highlander come from 2 brands — WAGNER and PHILIPS. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.
Extended Life: 2 parts, from PHILIPS and WAGNER. A representative part number is PHILIPS 7444NALL.
Standard Replacement: 1 part, from WAGNER. A representative part number is WAGNER 7444NA.
Listed part numbers: PHILIPS 7444NALL and WAGNER 7444NA, plus the other parts above.
Side Marker Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 168LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
| PHILIPS Fits: all 2021 Highlander engines | 12396NALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Longer LifeNatural Amber | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: all 2021 Highlander engines | 194RLED | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Ultinon LEDRed | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| PHILIPS Fits: all 2021 Highlander engines | 12961 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front | 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.
5 Side Marker Light Bulb parts are listed for the 2021 Toyota Highlander, from PHILIPS and HELLA. All of them fit every engine offered in the 2021 Highlander.
The Extended Life section: 2 options from HELLA and PHILIPS. HELLA 168LL is listed in this group.
LED (instant-on, long life, energy-saving): 1 part, from PHILIPS. A representative part number is PHILIPS 194RLED.
The Standard Replacement section: 2 options from HELLA and PHILIPS. HELLA 168 is listed in this group.
This group includes HELLA 168LL, PHILIPS 12396NALL and PHILIPS 194RLED and the remaining parts above.
Trunk / Cargo Area Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 168LL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | 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.
2 Trunk / Cargo Area Light Bulb parts for the 2021 Toyota Highlander come from HELLA. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.
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.
Part numbers include HELLA 168LL and HELLA 168.
Turn Signal Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Popular Fits: all 2021 Highlander engines | 7444NALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Longer LifeNatural Amber | View on Amazon |
| HELLA Fits: all 2021 Highlander engines | 7440NALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentLong Life | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 7444NALL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Long LifeNatural Amber | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: all 2021 Highlander engines | 7440NA | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentNatural Amber | View on Amazon |
| WAGNER Fits: all 2021 Highlander engines | 7444NA | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Natural 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.
5 Turn Signal Lamp Bulb parts are listed for the 2021 Toyota Highlander, from HELLA, WAGNER and PHILIPS. PHILIPS 7444NALL carries the "Popular" badge. All of them fit every engine offered in the 2021 Highlander.
The Extended Life section: 3 options from PHILIPS, HELLA and WAGNER. PHILIPS 7444NALL is listed in this group.
The Standard Replacement section: 2 options from HELLA and WAGNER. HELLA 7440NA is listed in this group.
Part numbers include PHILIPS 7444NALL and HELLA 7440NALL, among others listed above.
Turn Signal Lamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Highlander engines | S2653 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear | View on Amazon |
This table covers the sockets that hold a Turn Signal Lamp bulb. Typical signs include a flicker over bumps, melted plastic, or a bulb that will not stay seated. Dielectric grease on the contacts slows corrosion. Do not force a bulb into a heat-damaged socket.
One part is listed for the 2021 Toyota Highlander — STANDARD MOTOR PRODUCTS S2653.
Buying Electrical Bulb & Socket Parts for a 2021 Toyota Highlander
On this vehicle, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.
- You do not need to pick an engine: every electrical bulb & socket part on this page fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.
- 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: Headlamp Bulb and Back Up / Reverse Lamp Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2021 Toyota Highlander?
Our catalog currently lists 49 electrical bulb & socket parts for the 2021 Toyota Highlander across 14 subcategories and 4 brands, covering both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6. Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2021 Toyota Highlander engines?
No. On this page every electrical bulb & socket part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6. You do not need to pick an engine to choose the right row — use the notes for position and trim.
What are the signs of electrical bulb & socket problems on a 2021 Toyota Highlander?
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 Highlander 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 Highlander?
Every part on this page already fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6. 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 Highlander
Electrical Bulb & Socket Parts for Other Toyota Highlander Years
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