This page lists 29 ignition parts for the 2021 Audi A4, across 4 part types, covering both the 2.0L L4 ELECTRIC/GAS Turbocharged and the 2.0L L4 Turbocharged. Every part shows its brand, manufacturer part number and fitment notes.
On the 2021 Audi A4, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. Most of the listed parts are Ignition Coil (16 parts), Spark Plug (5 parts) and Camshaft Position Sensor (4 parts). The other 1 part type covers the remaining 4 parts.
The 2021 Audi A4 was sold with both the 2.0L L4 ELECTRIC/GAS Turbocharged and the 2.0L L4 Turbocharged. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
15 brands supply ignition parts for the 2021 Audi A4, led by SKP (3 parts), WELLS (3 parts) and BOSCH (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 Audi A4. 4 parts have it, including DELPHI GN10632 (Ignition Coil) and NGK 94833 (Spark Plug). Each part number opens a page with every vehicle that part fits.
Camshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP Fits: 2.0L L4 Turbocharged | SKPC984 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS Fits: 2.0L L4 Turbocharged | 2352067 | 🇲🇽 MX | Sensor OnlyConnector Shape: Oval | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MARELLI Fits: 2.0L L4 Turbocharged | SAC120 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS Fits: 2.0L L4 Turbocharged | 5S17946 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | A4 Quattro | 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.
4 Camshaft Position Sensor parts for the 2021 Audi A4 come from 4 brands — SKP, WALKER PRODUCTS, MARELLI and 1 other brand.
The Economy section lists 1 option from SKP — the catalog's value-priced group. SKP SKPC984 is listed in this group.
In the Standard Replacement grade, WALKER PRODUCTS supplies 1 part: built to original-equipment specification. A representative part number is WALKER PRODUCTS 2352067.
2 further parts sit outside the graded sections, with the same engine-level match.
Listed part numbers: SKP SKPC984, WALKER PRODUCTS 2352067 and MARELLI SAC120, plus the other parts above.
Crankshaft Position Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH Fits: 2.0L L4 Turbocharged | 0261210383 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Engine Crankshaft Position Sensor | View on Amazon |
| DELPHI Fits: 2.0L L4 Turbocharged | SS12483 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| MARELLI Fits: 2.0L L4 Turbocharged | SAG243 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AWDFrom 10/2015 | View on Amazon |
| WELLS Fits: 2.0L L4 Turbocharged | 5S17919 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | A4 Quattro | 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.
4 Crankshaft Position Sensor parts for the 2021 Audi A4 come from 4 brands — BOSCH, DELPHI, MARELLI and 1 other brand.
Part numbers include BOSCH 0261210383, DELPHI SS12483 and MARELLI SAG243, among others listed above.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: 2.0L L4 Turbocharged | 2IGC0516 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | A4 Quattro | View on Amazon |
| PRENCO Fits: 2.0L L4 Turbocharged | 368278 | 🇺🇸 US 🇨🇦 CA | Includes 36-2150 Boot Kit4WD | View on Amazon |
| SKP Fits: 2.0L L4 Turbocharged | SKUF716 | 🇺🇸 US | Hitachi design | View on Amazon |
| ULTRA-POWER Fits: 2.0L L4 Turbocharged | 5C1904 | 🇺🇸 US 🇨🇦 CA | 4WD/AWD | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DELPHI Popular Fits: 2.0L L4 Turbocharged | GN10632 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH Popular Fits: 2.0L L4 Turbocharged | 0986221072 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | A4 Quattro | View on Amazon |
| KARLYN / BREMI / STI Popular Fits: 2.0L L4 Turbocharged | 20529 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Bremi-STI Direct Ignition Coil Unit | View on Amazon |
| BECK/ARNLEY Fits: 2.0L L4 Turbocharged | 1788607 | 🇺🇸 US 🇨🇦 CA | Hitachi Coil | View on Amazon |
| BECK/ARNLEY Fits: 2.0L L4 Turbocharged | 1788574 | 🇺🇸 US 🇨🇦 CA | Eldor coil | View on Amazon |
| DENSO Fits: 2.0L L4 Turbocharged | 6739206 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Direct Ignition Coil or Coil On Plug | View on Amazon |
| NGK Fits: 2.0L L4 Turbocharged | 48900 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | A4 Quattrowith Eldor Coil | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged | UF716 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | A4 Quattro | View on Amazon |
| WALKER PRODUCTS Fits: 2.0L L4 Turbocharged | 9212313 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Single Coil | View on Amazon |
| WELLS Fits: 2.0L L4 Turbocharged | 5C1904 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | A4 Quattro | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRENCO Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 368278 | 🇺🇸 US 🇨🇦 CA | Includes 36-2150 Boot Kit | View on Amazon |
| ULTRA-POWER Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 5C1904 | 🇺🇸 US 🇨🇦 CA | 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.
16 Ignition Coil parts for the 2021 Audi A4 come from 13 brands — PRENCO, ULTRA-POWER, BECK/ARNLEY and 10 other brands. The "Popular" part is DELPHI GN10632.
The Economy section: 4 options from HOLSTEIN, PRENCO, SKP and 1 other brand. 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: 9 parts, from BECK/ARNLEY, BOSCH, KARLYN / BREMI / STI and 5 other brands. A representative part number is BOSCH 0986221072.
2 further parts sit outside the graded sections, with the same engine-level match.
Spark Plug
Summary: Notes include pre-set gaps of 0.025", 0.028" and 0.032". Replacement brands in this table include NGK, CHAMPION and BOSCH.
Double Platinum (lasts up to 3x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular Fits: 2.0L L4 Turbocharged | 94833 | 🇲🇽 MX | Laser PlatinumPre-Set Gap: 0.032" | View on Amazon |
| CHAMPION Fits: 2.0L L4 Turbocharged | 7600 | 🇺🇸 US 🇨🇦 CA | Double Platinum PowerPre-Set Gap: 0.028" | View on Amazon |
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH Fits: 2.0L L4 Turbocharged | 8501 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | EVOPre-Set Gap: 0.025" | View on Amazon |
| NGK Fits: 2.0L L4 Turbocharged | 94712 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Laser Iridium High Ignitability | View on Amazon |
| SKP Fits: 2.0L L4 Turbocharged | SK91006 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | A4 QuattroGap 0.028" | 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 Audi A4, from NGK, CHAMPION, BOSCH and 1 other brand. NGK 94833 carries the "Popular" badge.
In the Double Platinum (lasts up to 3x longer than Copper / Nickel) grade, NGK and CHAMPION supply 2 parts: grouped under the catalog's "Double Platinum (lasts up to 3x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is NGK 94833.
The Iridium (lasts up to 4x longer than Copper / Nickel) section lists 3 options from BOSCH, NGK and SKP — grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. BOSCH 8501 is listed in this group.
Part numbers include NGK 94833, CHAMPION 7600 and BOSCH 8501, among others listed above.
Buying Ignition Parts for a 2021 Audi A4
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Match the engine first. Every ignition part here is 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 Spark Plug .
Frequently Asked Questions
How many ignition parts fit the 2021 Audi A4?
Our catalog currently lists 29 ignition parts for the 2021 Audi A4 across 4 subcategories and 15 brands, covering both the 2.0L L4 ELECTRIC/GAS Turbocharged and the 2.0L L4 Turbocharged. Each part is matched to the engine(s) it fits.
Do ignition parts differ between 2021 Audi A4 engines?
Yes. Every ignition part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. 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 A4?
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 A4?
Notes on this page include pre-set gaps of 0.025", 0.028" and 0.032". 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 A4 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 A4?
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 A4
Ignition Parts for Other Audi A4 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.