2021 Toyota Highlander Electrical Switch & Relay Parts

This table covers the relays that control the A/C Compressor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

3 A/C Compressor Relay parts are listed for the 2021 Toyota Highlander, from STANDARD MOTOR PRODUCTS and DENSO. 2 parts fit every engine; the other 1 is engine-specific.

Listed part numbers: DENSO 5670020, STANDARD MOTOR PRODUCTS RY465T and STANDARD MOTOR PRODUCTS RY465.

This table covers the relays that control the A/C Condenser Fan Motor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

3 A/C Condenser Fan Motor Relay parts are listed for the 2021 Toyota Highlander, from STANDARD MOTOR PRODUCTS and DENSO. 2 parts fit every engine; the other 1 is engine-specific.

This group includes DENSO 5670020, STANDARD MOTOR PRODUCTS RY465T and STANDARD MOTOR PRODUCTS RY465.

This table covers the pressure switches on the A/C circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

2 A/C Refrigerant Pressure Switch parts are listed for the 2021 Toyota Highlander, from GPD and UAC. All of them fit every engine offered in the 2021 Highlander.

Part numbers include GPD 1713402 and UAC SW11605C.

This table covers the relays that control the Blower Motor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

DENSO supplies both parts for the 2021 Toyota Highlander. All of them fit every engine offered in the 2021 Highlander.

This group includes DENSO 5670003 and DENSO 5670004.

This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

One part is listed for the 2021 Toyota Highlander — WELLS 1S16745.

This table covers the relays that control the Cruise Control circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

One part is listed for the 2021 Toyota Highlander — DENSO 5670002.

This table covers the relays that control the Daytime Running Light circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

DENSO supplies the 3 Daytime Running Light Relay parts for the 2021 Toyota Highlander. All of them fit every engine offered in the 2021 Highlander.

Listed part numbers: DENSO 5670003, DENSO 5670004 and DENSO 5670002.

This table covers the relays that control the Defroster circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

DENSO supplies the 3 Defroster Relay parts for the 2021 Toyota Highlander. All of them fit every engine offered in the 2021 Highlander.

Listed part numbers: DENSO 5670003, DENSO 5670004 and DENSO 5670002.

This table covers the dimmer switches that select headlamp high and low beam. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

This group shows a single part: WELLS 1S18186.

This table covers the Door Jamb switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

2 Door Jamb Switch parts for the 2021 Toyota Highlander come from 2 brands — DORMAN and STANDARD MOTOR PRODUCTS. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.

This group includes DORMAN 920719 and STANDARD MOTOR PRODUCTS AW1046.

This table covers the relays that control the Engine Control Module circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

2 Engine Control Module Relay parts for the 2021 Toyota Highlander come from DENSO. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.

This group includes DENSO 5670003 and DENSO 5670004.

This table covers the relays that control the Fog / Driving Lamp circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

4 Fog / Driving Lamp Relay parts are listed for the 2021 Toyota Highlander, from DENSO and STANDARD MOTOR PRODUCTS. All of them fit every engine offered in the 2021 Highlander.

This group includes DENSO 5670003, DENSO 5670004 and STANDARD MOTOR PRODUCTS RY348T and the remaining parts above.

This table covers the relays that control the Fuel Pump / Circuit Opening circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

4 Fuel Pump / Circuit Opening Relay parts are listed for the 2021 Toyota Highlander, from DENSO and STANDARD MOTOR PRODUCTS. All of them fit every engine offered in the 2021 Highlander.

Part numbers include DENSO 5670004, DENSO 5670002 and STANDARD MOTOR PRODUCTS RY345T, among others listed above.

This table covers the relays that control the Headlamp circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

One part is listed for the 2021 Toyota Highlander — DENSO 5670003.

This table covers the column or dash switches that control the exterior lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

This group shows a single part: WELLS 1S18186.

This table covers the relays that control the Horn circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

2 Horn Relay parts for the 2021 Toyota Highlander come from 2 brands — DENSO and WELLS. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.

Listed part numbers: DENSO 5670004 and WELLS 1R1696.

This table covers the ignition switches that feed the starter circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

This group shows a single part: WELLS 1S17913.

This table covers the Neutral Safety Switch / Range sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

One part is listed for the 2021 Toyota Highlander — VEMO V70730066.

This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch. Read more

14 Oil Pressure Sender / Switch parts are listed for the 2021 Toyota Highlander, from STANDARD MOTOR PRODUCTS, WELLS, HOLSTEIN and 7 other brands. BECK/ARNLEY 2011649 carries the "Popular" badge. 1 part fits every engine; the other 13 are engine-specific.

In the Economy grade, HOLSTEIN, STANDARD MOTOR PRODUCTS, ULTRA-POWER and 2 other brands supply 5 parts: the catalog's value-priced group. A representative part number is HOLSTEIN 2OPS0003.

The Standard Replacement section lists 9 options from WELLS, STANDARD MOTOR PRODUCTS, BECK/ARNLEY and 3 other brands — built to original-equipment specification. BECK/ARNLEY 2011649 is listed in this group.

This table covers the relays that control the Power Steering circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

One part is listed for the 2021 Toyota Highlander — DENSO 5670003.

This table covers the relays that control the Power Window circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

This group shows a single part: DENSO 5670004.

This table covers the switches that command each window motor. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

DORMAN supplies both parts for the 2021 Toyota Highlander. All of them fit every engine offered in the 2021 Highlander.

This group includes DORMAN 920805 and DORMAN 920806.

This table covers the relays that control the Radiator Fan circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

5 Radiator Fan Relay parts for the 2021 Toyota Highlander come from 2 brands — DENSO and STANDARD MOTOR PRODUCTS. The "Popular" part is STANDARD MOTOR PRODUCTS RY345. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.

This group includes STANDARD MOTOR PRODUCTS RY345, DENSO 5670003 and DENSO 5670004 and the remaining parts above.

This table covers the relays that control the Seat Heater circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

One part is listed for the 2021 Toyota Highlander — DENSO 5670004.

This table covers the relays that control the Starter Motor Control circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

4 Starter Motor Control Relay parts for the 2021 Toyota Highlander come from 2 brands — DENSO and STANDARD MOTOR PRODUCTS. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.

This group includes DENSO 5670003, DENSO 5670004 and STANDARD MOTOR PRODUCTS RY348T and the remaining parts above.

This table covers the relays that control the Tail Lamp circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

One part is listed for the 2021 Toyota Highlander — DENSO 5670004.

This table covers the relays that control the Turn Signal circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

This group shows a single part: DENSO 5670003.

This table covers the combination / turn-signal switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

One part is listed for the 2021 Toyota Highlander — WELLS 1S18186.

This table covers the relays that control the Water Pump circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is. Read more

This group shows a single part: DENSO 5670020.

This table covers the Wiper / Washer switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too. Read more

This group shows a single part: STANDARD MOTOR PRODUCTS WP662.