32 Electrical switch & relay parts are listed for the 2021 Acura Ilx, in 12 part types, covering the 2.4L L4 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The switch and relay system on the 2021 Acura Ilx covers the switches, relays and flashers that route power to everything the driver touches. The largest groups are Oil Pressure Sender / Switch (10 parts), Brake Light Switch (5 parts) and Power Window Switch (4 parts). The other 9 part types cover the remaining 13 parts.
Every part on this page is matched to the 2.4L L4 — the only engine offered in the 2021 Acura Ilx.
The most listed brands for 2021 Acura Ilx electrical switch & relay parts are WELLS (11 parts), STANDARD MOTOR PRODUCTS (5 parts) and HOLSTEIN (3 parts), plus 10 more brands. Quality grades include Standard Replacement and Economy.
3 parts on this 2021 Acura Ilx page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including STANDARD MOTOR PRODUCTS SLS589 (Brake Light Switch) and BECK/ARNLEY 2011649 (Oil Pressure Sender / Switch). Click any part number to see every vehicle that part fits.
A/C Pressure Safety Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V26730082 | 🇺🇸 US 🇨🇦 CA | 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.
One part is listed for the 2021 Acura Ilx — VEMO V26730082.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS | 37312 | 🇺🇸 US 🇨🇦 CA | Pressure Switch | View on Amazon |
| UAC | SW9970C | 🇺🇸 US 🇨🇦 CA | Pressure Transducer | View on Amazon |
| WELLS | 5S15926 | 🇺🇸 US 🇨🇦 CA | CUT-OFF | 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.
3 A/C Refrigerant Pressure Switch parts for the 2021 Acura Ilx come from 3 brands — FOUR SEASONS, UAC and WELLS.
Listed part numbers: FOUR SEASONS 37312, UAC SW9970C and WELLS 5S15926.
Accessory Power Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY716 | 🇺🇸 US 🇨🇦 CA | In Engine Compartment | 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.
One part is listed for the 2021 Acura Ilx — STANDARD MOTOR PRODUCTS RY716.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 920470 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| HOLSTEIN | 2BLS0030 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | SLS589 | 🇺🇸 US 🇨🇦 CA | Color/Finish: Blue, White | View on Amazon |
| BECK/ARNLEY | 2012753 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S17041 | 🇺🇸 US 🇨🇦 CA | 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.
5 Brake Light Switch parts for the 2021 Acura Ilx come from 5 brands — DORMAN, HOLSTEIN, STANDARD MOTOR PRODUCTS and 2 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS SLS589.
The Economy section lists 2 options from DORMAN and HOLSTEIN — the catalog's value-priced group. DORMAN 920470 is listed in this group.
In the Standard Replacement grade, STANDARD MOTOR PRODUCTS and BECK/ARNLEY supply 2 parts: built to original-equipment specification. A representative part number is STANDARD MOTOR PRODUCTS SLS589.
1 further part sits outside the graded sections, with the same engine-level match.
Listed part numbers: STANDARD MOTOR PRODUCTS SLS589, DORMAN 920470 and HOLSTEIN 2BLS0030, plus the other parts above.
Dimmer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S15146 | 🇺🇸 US 🇨🇦 CA | without Fog Lights | View on Amazon |
| WELLS | 1S15147 | 🇺🇸 US 🇨🇦 CA | with Fog Lights | View on Amazon |
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.
WELLS supplies both parts for the 2021 Acura Ilx.
Listed part numbers: WELLS 1S15146 and WELLS 1S15147.
Fuel Pump / Circuit Opening Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 600069 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 1R1631 | 🇺🇸 US 🇨🇦 CA | 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 for the 2021 Acura Ilx come from 2 brands — ROSTRA and WELLS.
This group includes ROSTRA 600069 and WELLS 1R1631.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S17892 | 🇺🇸 US 🇨🇦 CA | 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.
One part is listed for the 2021 Acura Ilx — WELLS 1S17892.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2OPS0029 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS | PS469T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
| UNITED MOTOR PRODUCTS | OPS229 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WALKER PRODUCTS | 2561049 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Popular | 2011649 | 🇺🇸 US 🇨🇦 CA | with Light | View on Amazon |
| HELLA Popular | 003259511 | 🇺🇸 US 🇨🇦 CA | 1-Pin ConnectorColor: Black | View on Amazon |
| GPD | 1815350 | 🇺🇸 US 🇨🇦 CA | with Light | View on Amazon |
| ROSTRA | 501271 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS | PS469 | 🇺🇸 US 🇨🇦 CA | Connector Shape: Square | View on Amazon |
| WELLS | 1S9563 | 🇺🇸 US 🇨🇦 CA | 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.
10 Oil Pressure Sender / Switch parts for the 2021 Acura Ilx come from 9 brands — STANDARD MOTOR PRODUCTS, HOLSTEIN, UNITED MOTOR PRODUCTS and 6 other brands. The "Popular" part is BECK/ARNLEY 2011649.
The Economy section: 4 options from HOLSTEIN, STANDARD MOTOR PRODUCTS, UNITED MOTOR PRODUCTS and 1 other brand. HOLSTEIN 2OPS0029 is listed in this group.
Standard Replacement: 6 parts, from BECK/ARNLEY, HELLA, GPD and 3 other brands. A representative part number is BECK/ARNLEY 2011649.
Power Window Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2WIN0009 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| WELLS | 1S12983 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| WELLS | 1S15681 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| WELLS | 1S15682 | 🇺🇸 US 🇨🇦 CA | Front Left | 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.
4 Power Window Switch parts for the 2021 Acura Ilx come from 2 brands — WELLS and HOLSTEIN.
Part numbers include HOLSTEIN 2WIN0009, WELLS 1S12983 and WELLS 1S15681, among others listed above.
Starter Motor Cutoff Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY716 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the relays that control the Starter Motor Cutoff 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.
One part is listed for the 2021 Acura Ilx — STANDARD MOTOR PRODUCTS RY716.
Variable Valve Timing (VVT) Oil Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 918853 | 🇺🇸 US 🇨🇦 CA | 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.
One part is listed for the 2021 Acura Ilx — DORMAN 918853.
Wiper / Washer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S15137 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
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.
One part is listed for the 2021 Acura Ilx — WELLS 1S15137.
Buying Electrical Switch & Relay Parts for a 2021 Acura Ilx
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 2.4L L4 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: Oil Pressure Sender / Switch and Brake Light Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2021 Acura Ilx?
Our catalog currently lists 32 electrical switch & relay parts for the 2021 Acura Ilx across 12 subcategories and 13 brands, covering the 2.4L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 2021 Acura Ilx?
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 Acura Ilx 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 Acura Ilx?
Every part on this page is matched to the 2.4L L4 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 Acura Ilx
Electrical Switch & Relay Parts for Other Acura Ilx Years
Switch vehicle or jump to a subcategory
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.