This page lists 31 electrical switch & relay parts for the 2021 Honda Insight, across 13 part types, covering the 1.5L L4 ELECTRIC/GAS engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2021 Honda Insight, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. Most of the listed parts are Accessory Power Relay (4 parts), Oil Pressure Sender / Switch (4 parts) and Blower Motor Relay (3 parts). The other 10 part types cover the remaining 20 parts.
The 2021 Honda Insight came with a single engine, the 1.5L L4 ELECTRIC/GAS, and every part is verified against it.
11 brands supply electrical switch & relay parts for the 2021 Honda Insight, led by STANDARD MOTOR PRODUCTS (10 parts), WELLS (8 parts) and HOLSTEIN (3 parts), plus 8 more brands. Quality grades include Standard Replacement and Economy.
Each part number listed for the 2021 Honda Insight opens a page with every vehicle that part fits.
A/C Pressure Safety Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V26730082 | 🇺🇸 US 🇨🇦 CA | EX Model or LX Model or Touring | View on Amazon |
This table covers the A/C Pressure Safety 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.
This group shows a single part: VEMO V26730082.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS | 37312 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Switch | View on Amazon |
| UAC | SW9970C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Transducer | View on Amazon |
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.
2 A/C Refrigerant Pressure Switch parts are listed for the 2021 Honda Insight, from FOUR SEASONS and UAC.
Listed part numbers: FOUR SEASONS 37312 and UAC SW9970C.
Accessory Power Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2RSW0025 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 4 Blade Terminal | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY1052T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY721 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 4 Blade Terminals | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY716 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | In Engine Compartmentwith 5 Blade Terminals | View on Amazon |
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.
4 Accessory Power Relay parts for the 2021 Honda Insight come from 2 brands — STANDARD MOTOR PRODUCTS and HOLSTEIN.
Part numbers include HOLSTEIN 2RSW0025, STANDARD MOTOR PRODUCTS RY1052T and STANDARD MOTOR PRODUCTS RY721, among others listed above.
Blower Motor Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2RSW0025 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| STANDARD MOTOR PRODUCTS | RY1052T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY721 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
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.
3 Blower Motor Relay parts are listed for the 2021 Honda Insight, from STANDARD MOTOR PRODUCTS and HOLSTEIN.
This group includes HOLSTEIN 2RSW0025, STANDARD MOTOR PRODUCTS RY1052T and STANDARD MOTOR PRODUCTS RY721.
Brake Light Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 620244 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| STANDARD MOTOR PRODUCTS | SLS602 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS | 1S12665 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
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.
3 Brake Light Switch parts are listed for the 2021 Honda Insight, from ROSTRA, STANDARD MOTOR PRODUCTS and WELLS.
Listed part numbers: ROSTRA 620244, STANDARD MOTOR PRODUCTS SLS602 and WELLS 1S12665.
Defroster Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2RSW0025 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| STANDARD MOTOR PRODUCTS | RY1052T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY721 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
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.
3 Defroster Relay parts are listed for the 2021 Honda Insight, from STANDARD MOTOR PRODUCTS and HOLSTEIN.
Part numbers include HOLSTEIN 2RSW0025, STANDARD MOTOR PRODUCTS RY1052T and STANDARD MOTOR PRODUCTS RY721.
Fuel Pump / Circuit Opening Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 600069 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS | 1R1631 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Hardware Included: No | View on Amazon |
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.
2 Fuel Pump / Circuit Opening Relay parts are listed for the 2021 Honda Insight, from ROSTRA and WELLS.
This group includes ROSTRA 600069 and WELLS 1R1631.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S17777 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Push Button Switch | View on Amazon |
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.
This group shows a single part: WELLS 1S17777.
Micro Plug Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY465T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY465 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the relays that control the Micro Plug 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.
STANDARD MOTOR PRODUCTS supplies both parts for the 2021 Honda Insight.
Part numbers include STANDARD MOTOR PRODUCTS RY465T and STANDARD MOTOR PRODUCTS RY465.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS | 2561021 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 2012716 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
| GPD | 1815245 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Located on Oil Pump Housing | View on Amazon |
| WELLS | 1S9564 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
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.
4 Oil Pressure Sender / Switch parts are listed for the 2021 Honda Insight, from WALKER PRODUCTS, BECK/ARNLEY, GPD and 1 other brand.
In the Economy grade, WALKER PRODUCTS supplies 1 part: the catalog's value-priced group. A representative part number is WALKER PRODUCTS 2561021.
The Standard Replacement section lists 3 options from BECK/ARNLEY, GPD and WELLS — built to original-equipment specification. BECK/ARNLEY 2012716 is listed in this group.
Part numbers include WALKER PRODUCTS 2561021, BECK/ARNLEY 2012716 and GPD 1815245, among others listed above.
Outside Mirror Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V26730070 | 🇺🇸 US 🇨🇦 CA | EX Model or LX Model or TouringElectric | View on Amazon |
This table covers the Outside Mirror 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.
This group shows a single part: VEMO V26730070.
Power Window Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S15598 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Right | View on Amazon |
| WELLS | 1S15580 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Left | View on Amazon |
| WELLS | 1S15599 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear | View on Amazon |
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.
WELLS supplies the 3 Power Window Switch parts for the 2021 Honda Insight.
Listed part numbers: WELLS 1S15598, WELLS 1S15580 and WELLS 1S15599.
Variable Valve Timing (VVT) Oil Pressure Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOTECNICA | HA1319047 | 🇺🇸 US | EX Model or LX ModelRequires (1) 91319-PAA-A01 Seal Ring | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S12034 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Variable Valve Timing (VVT) Oil Pressure 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.
2 Variable Valve Timing (VVT) Oil Pressure Switch parts for the 2021 Honda Insight come from 2 brands — AUTOTECNICA and WELLS.
The Economy section: 1 option from AUTOTECNICA. AUTOTECNICA HA1319047 is listed in this group.
Standard Replacement: 1 part, from WELLS. A representative part number is WELLS 1S12034.
This group includes AUTOTECNICA HA1319047 and WELLS 1S12034.
Buying Electrical Switch & Relay Parts for a 2021 Honda Insight
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 1.5L 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, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Accessory Power Relay and Oil Pressure Sender / Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2021 Honda Insight?
Our catalog currently lists 31 electrical switch & relay parts for the 2021 Honda Insight across 13 subcategories and 11 brands, covering the 1.5L L4 ELECTRIC/GAS engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 2021 Honda Insight?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. 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, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
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 Honda Insight 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 Honda Insight?
Every part on this page is matched to the 1.5L L4 ELECTRIC/GAS engine. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Honda Insight
Electrical Switch & Relay Parts for Other Honda Insight Years
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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.