2021 Toyota Sienna Electrical Switch & Relay Parts

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 Sienna, from GPD and UAC.

This group includes GPD 1713402 and UAC SW11605C.

This table covers the relays that control the A/C System 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 Sienna — UAC RE8402C.

This table covers the relays that control the Accessory Power 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: STANDARD MOTOR PRODUCTS RY1615.

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 Sienna.

Listed part numbers: 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 Sienna, from FAMOUS BRAND and WELLS.

In the Economy grade, FAMOUS BRAND supplies 1 part: the catalog's value-priced group. A representative part number is FAMOUS BRAND SLA1024.

The Standard Replacement section lists 1 option from WELLS — built to original-equipment specification. WELLS 1S16745 is listed in this group.

Listed part numbers: FAMOUS BRAND SLA1024 and 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 Sienna — 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 Sienna.

This group includes 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 Sienna.

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 1S12748.

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 Sienna come from 2 brands — DORMAN and STANDARD MOTOR PRODUCTS.

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 Sienna 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 Sienna, 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

This group shows a single part: WELLS 1S12748.

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 Sienna, from DENSO and STANDARD MOTOR PRODUCTS.

This group includes DENSO 5670004, DENSO 5670002 and STANDARD MOTOR PRODUCTS RY345T and the remaining parts 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 Sienna — 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 1S12748.

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 Sienna come from 2 brands — DENSO and WELLS.

Part numbers include DENSO 5670004 and WELLS 1R1696.

This table covers the relays that control the Ignition 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: STANDARD MOTOR PRODUCTS RY1615.

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

3 Oil Pressure Sender / Switch parts are listed for the 2021 Toyota Sienna, from WELLS and STANDARD MOTOR PRODUCTS.

Part numbers include STANDARD MOTOR PRODUCTS PS765, WELLS 1S16610 and WELLS 1S16611.

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 Sienna — 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 Sienna.

Listed part numbers: 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 Sienna come from 2 brands — DENSO and STANDARD MOTOR PRODUCTS. The "Popular" part is STANDARD MOTOR PRODUCTS RY345.

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 Sienna — 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 Sienna come from DENSO.

This group includes 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 Sienna — 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 Sienna — WELLS 1S12748.

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.