The 2021 Acura RDX has 27 ignition parts with verified fitment on this page — 4 part types and 15 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2021 Acura RDX, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. Most of the listed parts are Ignition Coil (11 parts), Camshaft Position Sensor (8 parts) and Spark Plug (5 parts). The other 1 part type covers the remaining 3 parts.
The 2021 Acura RDX came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
15 brands supply ignition parts for the 2021 Acura RDX, led by NGK (4 parts), STANDARD MOTOR PRODUCTS (3 parts) and WALKER PRODUCTS (3 parts), plus 12 more brands. Quality grades include Standard Replacement, Economy and Iridium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Acura RDX. 6 parts have it, including STANDARD MOTOR PRODUCTS PC1084 (Camshaft Position Sensor) and ASTEMO / HITACHI IGC0095 (Ignition Coil). Each part number opens a page with every vehicle that part fits.
Camshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2CAM0586 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ULTRA-POWER | PC1084 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| VEMO | V26770041 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | PC1084 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WALKER PRODUCTS Popular | 2352082 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sensor Only | View on Amazon |
| ASTEMO / HITACHI | CPS0027 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| DELPHI | SS12155 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 5S15089 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the sensors that report camshaft position to the ECU. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
8 Camshaft Position Sensor parts for the 2021 Acura RDX come from 8 brands — HOLSTEIN, ULTRA-POWER, VEMO and 5 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS PC1084.
The Economy section lists 3 options from HOLSTEIN, ULTRA-POWER and VEMO — the catalog's value-priced group. HOLSTEIN 2CAM0586 is listed in this group.
In the Standard Replacement grade, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, ASTEMO / HITACHI and 2 other brands supply 5 parts: built to original-equipment specification. A representative part number is STANDARD MOTOR PRODUCTS PC1084.
Part numbers include STANDARD MOTOR PRODUCTS PC1084, HOLSTEIN 2CAM0586 and VEMO V26770041, among others listed above.
Crankshaft Position Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | PC1198 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WALKER PRODUCTS | 2352258 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sensor Only | View on Amazon |
| WELLS | 5S15172 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the sensors that report crankshaft position and engine speed. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
3 Crankshaft Position Sensor parts for the 2021 Acura RDX come from 3 brands — STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and WELLS.
Part numbers include STANDARD MOTOR PRODUCTS PC1198, WALKER PRODUCTS 2352258 and WELLS 5S15172.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2IGC0563 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| SKP | SKUF781 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| SPECTRA PREMIUM | C1112 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ASTEMO / HITACHI Popular | IGC0095 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Terminal Quantity: 3 | View on Amazon |
| DELPHI Popular | GN10886 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | UF781 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| BECK/ARNLEY | 1788582 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| DENSO | 6732202 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Direct Ignition Coil or Coil On Plug | View on Amazon |
| NGK | 49183 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WALKER PRODUCTS | 9212312 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Single Coil | View on Amazon |
| WELLS | 5C2254 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.
11 Ignition Coil parts for the 2021 Acura RDX come from 11 brands — HOLSTEIN, SKP, SPECTRA PREMIUM and 8 other brands. The "Popular" part is ASTEMO / HITACHI IGC0095.
The Economy section: 3 options from HOLSTEIN, SKP and SPECTRA PREMIUM. HOLSTEIN 2IGC0563 is listed in this group.
In the Premium grade, ASTEMO / HITACHI and DELPHI supply 2 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is ASTEMO / HITACHI IGC0095.
Standard Replacement: 6 parts, from STANDARD MOTOR PRODUCTS, BECK/ARNLEY, DENSO and 3 other brands. A representative part number is STANDARD MOTOR PRODUCTS UF781.
Spark Plug
Summary: Notes include pre-set gaps of 0.030", 0.032" and 0.040". Replacement brands in this table include NGK, AUTOLITE and BOSCH.
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOLITE | XP5682 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Iridium XPPre-Set Gap: 0.040" | View on Amazon |
| BOSCH | 8505 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | EVO | View on Amazon |
| NGK | 92411 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Laser Iridium High Ignitability | View on Amazon |
| NGK | DILKAR8P8SY | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Laser Iridium High Ignitability | View on Amazon |
Ruthenium (maximum durability & ignitability)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular | 91784 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Ruthenium HX High IgnitabilityPre-Set Gap: 0.032" | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
5 Spark Plug parts are listed for the 2021 Acura RDX, from NGK, AUTOLITE and BOSCH. NGK 91784 carries the "Popular" badge.
The Iridium (lasts up to 4x longer than Copper / Nickel) section lists 4 options from NGK, AUTOLITE and BOSCH — grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. AUTOLITE XP5682 is listed in this group.
In the Ruthenium (maximum durability & ignitability) grade, NGK supplies 1 part: grouped under the catalog's "Ruthenium (maximum durability & ignitability)" designation — the notes column spells out what sets them apart. A representative part number is NGK 91784.
Part numbers include NGK 91784, AUTOLITE XP5682 and BOSCH 8505, among others listed above.
Buying Ignition Parts for a 2021 Acura RDX
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Confirm you have the 2.0L L4 Turbocharged 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, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Ignition Coil and Camshaft Position Sensor .
Frequently Asked Questions
How many ignition parts fit the 2021 Acura RDX?
Our catalog currently lists 27 ignition parts for the 2021 Acura RDX across 4 subcategories and 15 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of ignition problems on a 2021 Acura RDX?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 2021 Acura RDX?
Notes on this page include pre-set gaps of 0.030", 0.032" and 0.040". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
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 RDX 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 RDX?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Acura RDX
Ignition Parts for Other Acura RDX Years
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