2021 Toyota 4RUNNER 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 4RUNNER, from STANDARD MOTOR PRODUCTS and DENSO.

This group includes 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 4RUNNER, from STANDARD MOTOR PRODUCTS and DENSO.

Listed part numbers: 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

3 A/C Refrigerant Pressure Switch parts are listed for the 2021 Toyota 4RUNNER, from FOUR SEASONS, UAC and WELLS.

Part numbers include FOUR SEASONS 20929, UAC SW11646C and WELLS 1S16190.

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 4RUNNER.

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

2 Brake Light Switch parts are listed for the 2021 Toyota 4RUNNER, from STANDARD MOTOR PRODUCTS and WELLS.

This group includes STANDARD MOTOR PRODUCTS SLS611 and WELLS 1S16749.

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 both parts for the 2021 Toyota 4RUNNER.

Part numbers include DENSO 5670003 and DENSO 5670004.

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 both parts for the 2021 Toyota 4RUNNER.

Listed part numbers: DENSO 5670003 and DENSO 5670004.

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

2 Dimmer Switch parts for the 2021 Toyota 4RUNNER come from 2 brands — ROSTRA and WELLS.

This group includes ROSTRA 641111 and WELLS 1S12164.

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 4RUNNER come from DENSO.

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 4RUNNER, from DENSO and STANDARD MOTOR PRODUCTS.

Listed part numbers: DENSO 5670003, DENSO 5670004 and STANDARD MOTOR PRODUCTS RY348T, plus the other parts above.

This table covers the Fog / Driving Lamp 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 Fog / Driving Lamp Switch parts for the 2021 Toyota 4RUNNER come from 2 brands — ROSTRA and WELLS.

Listed part numbers: ROSTRA 641111 and WELLS 1S12164.

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

One part is listed for the 2021 Toyota 4RUNNER — DENSO 5670004.

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 4RUNNER — 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

2 Headlamp Switch parts for the 2021 Toyota 4RUNNER come from 2 brands — ROSTRA and WELLS.

Part numbers include ROSTRA 641111 and WELLS 1S12164.

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 4RUNNER come from 2 brands — DENSO and WELLS.

Part numbers include 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 1S15474.

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

2 Neutral Safety Switch / Range Sensor parts are listed for the 2021 Toyota 4RUNNER, from STANDARD MOTOR PRODUCTS and WELLS.

This group includes STANDARD MOTOR PRODUCTS NS776 and WELLS 1S11387.

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

10 Oil Pressure Sender / Switch parts are listed for the 2021 Toyota 4RUNNER, from STANDARD MOTOR PRODUCTS, HOLSTEIN, UNITED MOTOR PRODUCTS and 6 other brands. BECK/ARNLEY 2011649 carries the "Popular" badge.

In the Economy grade, HOLSTEIN, STANDARD MOTOR PRODUCTS, UNITED MOTOR PRODUCTS and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is HOLSTEIN 2OPS0003.

The Standard Replacement section lists 6 options from BECK/ARNLEY, HELLA, ACDELCO 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 4RUNNER — 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

4 Power Window Switch parts are listed for the 2021 Toyota 4RUNNER, from DORMAN, STANDARD MOTOR PRODUCTS and WELLS.

Economy: 2 parts, from DORMAN. A representative part number is DORMAN 920741.

The Standard Replacement section: 2 options from STANDARD MOTOR PRODUCTS and WELLS. STANDARD MOTOR PRODUCTS DWS2033 is listed in this group.

Listed part numbers: DORMAN 920741, DORMAN 920736 and STANDARD MOTOR PRODUCTS DWS2033, plus the other parts above.

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

2 Radiator Fan Relay parts for the 2021 Toyota 4RUNNER come from DENSO.

This group includes DENSO 5670003 and DENSO 5670004.

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 4RUNNER — 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

2 Starter Motor Control Relay parts for the 2021 Toyota 4RUNNER come from DENSO.

Listed part numbers: DENSO 5670003 and DENSO 5670004.

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 4RUNNER — DENSO 5670004.

This table covers the Trunk Lid / Tailgate Release 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 Trunk Lid / Tailgate Release Switch parts for the 2021 Toyota 4RUNNER come from 2 brands — AUTOTECNICA and DORMAN.

Listed part numbers: AUTOTECNICA TY0819914 and DORMAN 901725.

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

3 Turn Signal Switch parts are listed for the 2021 Toyota 4RUNNER, from VEMO, ROSTRA and WELLS.

Economy: 1 part, from VEMO. A representative part number is VEMO V70800032.

The Standard Replacement section: 2 options from ROSTRA and WELLS. ROSTRA 641111 is listed in this group.

This group includes VEMO V70800032, ROSTRA 641111 and WELLS 1S12164.

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

2 Wiper / Washer Switch parts for the 2021 Toyota 4RUNNER come from 2 brands — DORMAN and WELLS.

The Economy section: 1 option from DORMAN. DORMAN 920750 is listed in this group.

Standard Replacement: 1 part, from WELLS. A representative part number is WELLS 1S12313.

Listed part numbers: DORMAN 920750 and WELLS 1S12313.