27 Ignition parts are listed for the 2021 Audi S4, in 4 part types, covering both the 3.0L V6 Supercharged and the 3.0L V6 Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 Audi S4, 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), Crankshaft Position Sensor (7 parts) and Camshaft Position Sensor (6 parts). The other 1 part type covers the remaining 3 parts.
The 2021 Audi S4 was sold with both the 3.0L V6 Supercharged and the 3.0L V6 Turbocharged. 20 parts fit every engine; the other 7 are engine-specific. Each part shows which engine(s) it fits.
17 brands supply ignition parts for the 2021 Audi S4, led by HOLSTEIN (3 parts), WALKER PRODUCTS (3 parts) and STANDARD MOTOR PRODUCTS (3 parts), plus 14 more brands. Quality grades include Standard Replacement, Economy and Premium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Audi S4. 7 parts have it, including HOLSTEIN 2CAM0327 (Camshaft Position Sensor) and ASTEMO / HITACHI CPS0055 (Crankshaft Position Sensor). Each part number opens a page with every vehicle that part fits.
Camshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Popular Fits: all 2021 S4 engines | 2CAM0327 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS Popular Fits: all 2021 S4 engines | 2352067 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sensor OnlyConnector Shape: Oval | View on Amazon |
| BECK/ARNLEY Fits: 3.0L V6 Turbocharged | 1800763 | 🇺🇸 US 🇨🇦 CA | To 2/6/23 | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 S4 engines | PC1217 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ÜRO PARTS Fits: all 2021 S4 engines | 06M907601D | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS Fits: all 2021 S4 engines | 5S17018 | 🇺🇸 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.
6 Camshaft Position Sensor parts for the 2021 Audi S4 come from 6 brands — HOLSTEIN, WALKER PRODUCTS, BECK/ARNLEY and 3 other brands. The "Popular" part is HOLSTEIN 2CAM0327. 5 parts fit every engine; the other 1 is engine-specific.
The Economy section lists 1 option from HOLSTEIN — the catalog's value-priced group. HOLSTEIN 2CAM0327 is listed in this group.
In the Standard Replacement grade, WALKER PRODUCTS, BECK/ARNLEY, STANDARD MOTOR PRODUCTS and 2 other brands supply 5 parts: built to original-equipment specification. A representative part number is WALKER PRODUCTS 2352067.
This group includes HOLSTEIN 2CAM0327, WALKER PRODUCTS 2352067 and BECK/ARNLEY 1800763 and the remaining parts above.
Crankshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: all 2021 S4 engines | 2CRK0840 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ÜRO PARTS Fits: all 2021 S4 engines | 057906433B | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| VEMO Fits: all 2021 S4 engines | V10720131 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ASTEMO / HITACHI Popular Fits: all 2021 S4 engines | CPS0055 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WALKER PRODUCTS Popular Fits: all 2021 S4 engines | 2352119 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sensor Only | View on Amazon |
| DELPHI Fits: 3.0L V6 Turbocharged | SS12465 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: all 2021 S4 engines | PC1146 | 🇺🇸 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.
7 Crankshaft Position Sensor parts for the 2021 Audi S4 come from 7 brands — HOLSTEIN, ÜRO PARTS, VEMO and 4 other brands. The "Popular" part is ASTEMO / HITACHI CPS0055. 6 parts fit every engine; the other 1 is engine-specific.
The Economy section: 3 options from HOLSTEIN, ÜRO PARTS and VEMO. HOLSTEIN 2CRK0840 is listed in this group.
Standard Replacement: 4 parts, from ASTEMO / HITACHI, WALKER PRODUCTS, DELPHI and 1 other brand. A representative part number is ASTEMO / HITACHI CPS0055.
This group includes ASTEMO / HITACHI CPS0055, HOLSTEIN 2CRK0840 and ÜRO PARTS 057906433B and the remaining parts above.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: all 2021 S4 engines | 2IGC0516 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| PRENCO Fits: 3.0L V6 Turbocharged | 368278 | 🇺🇸 US 🇨🇦 CA | Includes 36-2150 Boot Kit | View on Amazon |
| SKP Fits: 3.0L V6 Turbocharged | SKUF716 | 🇺🇸 US | Hitachi design | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DELPHI Popular Fits: 3.0L V6 Turbocharged | GN10632 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH Popular Fits: all 2021 S4 engines | 0986221072 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| KARLYN / BREMI / STI Popular Fits: all 2021 S4 engines | 20529 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Bremi-STI Direct Ignition Coil Unit | View on Amazon |
| BECK/ARNLEY Fits: all 2021 S4 engines | 1788574 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| DENSO Fits: all 2021 S4 engines | 6739206 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Direct Ignition Coil or Coil On Plug | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 S4 engines | UF716 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| UNITED MOTOR PRODUCTS Fits: all 2021 S4 engines | COP618 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Body code 8W | View on Amazon |
| WALKER PRODUCTS Fits: all 2021 S4 engines | 9212313 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Single Coil | 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 Audi S4 come from 11 brands — HOLSTEIN, PRENCO, SKP and 8 other brands. The "Popular" part is DELPHI GN10632. 8 parts fit every engine; the other 3 are engine-specific.
The Economy section: 3 options from HOLSTEIN, PRENCO and SKP. HOLSTEIN 2IGC0516 is listed in this group.
In the Premium grade, DELPHI supplies 1 part: a step above OE specification in materials, tolerances or warranty terms. A representative part number is DELPHI GN10632.
Standard Replacement: 7 parts, from BOSCH, KARLYN / BREMI / STI, BECK/ARNLEY and 4 other brands. A representative part number is BOSCH 0986221072.
Spark Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOLITE Fits: 3.0L V6 Turbocharged | XP3924 | 🇺🇸 US | Iridium XP Spark Plug Dual Display PackPre-Set Gap: 0.044" | View on Amazon |
| NGK Fits: all 2021 S4 engines | 93560 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Laser Iridium High Ignitability | View on Amazon |
| SKP Fits: 3.0L V6 Turbocharged | SP1013 | 🇺🇸 US | Iridium XP | 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.
3 Spark Plug parts are listed for the 2021 Audi S4, from AUTOLITE, NGK and SKP. 1 part fits every engine; the other 2 are engine-specific.
Part numbers include AUTOLITE XP3924, NGK 93560 and SKP SP1013.
Buying Ignition Parts for a 2021 Audi S4
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Match the engine first. Some ignition parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- 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 Crankshaft Position Sensor .
Frequently Asked Questions
How many ignition parts fit the 2021 Audi S4?
Our catalog currently lists 27 ignition parts for the 2021 Audi S4 across 4 subcategories and 17 brands, covering both the 3.0L V6 Supercharged and the 3.0L V6 Turbocharged. Each part is matched to the engine(s) it fits.
Do ignition parts differ between 2021 Audi S4 engines?
Some do. 20 parts fit every engine; the other 7 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of ignition problems on a 2021 Audi S4?
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 Audi S4?
Notes on this page include pre-set gaps of 0.028", 0.031" and 0.044". 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 Audi S4 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 Audi S4?
First match the engine — each row shows which engine(s) the part fits. 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 Audi S4
Ignition Parts for Other Audi S4 Years
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