The 2021 Audi S4 has 32 interior parts with verified fitment on this page — 7 part types and 7 brands, covering both the 3.0L V6 Supercharged and the 3.0L V6 Turbocharged. Each part includes a manufacturer part number and application notes.
The interior on the 2021 Audi S4 covers cabin hardware — seat components, handles, switch bezels, carpet, pedals and the pieces that take daily wear. The largest groups are Dash Board Cover (12 parts), Window Regulator (9 parts) and Floor Mat (5 parts). The other 4 part types cover the remaining 6 parts.
The 2021 Audi S4 was sold with both the 3.0L V6 Supercharged and the 3.0L V6 Turbocharged. 23 parts fit every engine; the other 9 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2021 Audi S4 interior parts are DASH DESIGNS (12 parts), MARELLI (8 parts) and VAICO (5 parts), plus 4 more brands. Quality grades include Standard Replacement, Suede and Woven.
4 parts on this 2021 Audi S4 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including DASH DESIGNS 23268C (Dash Board Cover) and 3D L1AD0420150 (Floor Mat). Click any part number to see every vehicle that part fits.
Cargo Area Mat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| 3D Fits: all 2021 S4 engines | M1AD042130 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | KAGU Triple Layer DesignCargo Liner | View on Amazon |
| VAICO Fits: all 2021 S4 engines | V108085 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rubber, Black | View on Amazon |
| VAICO Fits: all 2021 S4 engines | V108077 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rubber, Black | View on Amazon |
This table covers the Cargo Area mats.
3 Cargo Area Mat parts for the 2021 Audi S4 come from 2 brands — VAICO and 3D. Every part fits both the 3.0L V6 Supercharged and the 3.0L V6 Turbocharged.
Listed part numbers: 3D M1AD042130, VAICO V108085 and VAICO V108077.
Dash Board Cover
Carpet
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DASH DESIGNS Popular Fits: all 2021 S4 engines | 23268C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Poly Carpet | View on Amazon |
| DASH DESIGNS Fits: all 2021 S4 engines | 23318C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Poly Carpet | View on Amazon |
Suede
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DASH DESIGNS Popular Fits: all 2021 S4 engines | 23268B | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Brushed Suede | View on Amazon |
| DASH DESIGNS Fits: all 2021 S4 engines | 23318B | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Brushed Suede | View on Amazon |
| DASH DESIGNS Fits: all 2021 S4 engines | 23268D | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sedona Suede | View on Amazon |
| DASH DESIGNS Fits: all 2021 S4 engines | 23318D | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sedona Suede | View on Amazon |
Velour
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DASH DESIGNS Fits: all 2021 S4 engines | 23268V | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Plush Velour | View on Amazon |
| DASH DESIGNS Fits: all 2021 S4 engines | 23318V | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Plush Velour | View on Amazon |
Woven
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DASH DESIGNS Popular Fits: all 2021 S4 engines | 23268A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Camo | View on Amazon |
| DASH DESIGNS Fits: all 2021 S4 engines | 23268X | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Dashtex | View on Amazon |
| DASH DESIGNS Fits: all 2021 S4 engines | 23318A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Camo | View on Amazon |
| DASH DESIGNS Fits: all 2021 S4 engines | 23318X | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Dashtex | View on Amazon |
This table covers the dash covers that sit over the instrument panel.
12 Dash Board Cover parts for the 2021 Audi S4 come from DASH DESIGNS. The "Popular" part is DASH DESIGNS 23268C. Every part fits both the 3.0L V6 Supercharged and the 3.0L V6 Turbocharged.
In the Carpet grade, DASH DESIGNS supplies 2 parts: grouped under the catalog's "Carpet" designation — the notes column spells out what sets them apart. A representative part number is DASH DESIGNS 23268C.
The Suede section lists 4 options from DASH DESIGNS — grouped under the catalog's "Suede" designation — the notes column spells out what sets them apart. DASH DESIGNS 23268B is listed in this group.
In the Velour grade, DASH DESIGNS supplies 2 parts: grouped under the catalog's "Velour" designation — the notes column spells out what sets them apart. A representative part number is DASH DESIGNS 23268V.
In the Woven grade, DASH DESIGNS supplies 4 parts: grouped under the catalog's "Woven" designation — the notes column spells out what sets them apart. A representative part number is DASH DESIGNS 23268A.
Floor Mat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| 3D Popular Fits: all 2021 S4 engines | L1AD0420150 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | KAGU Triple Layer Design5 Piece | View on Amazon |
| 3D Fits: all 2021 S4 engines | L1AD0422150 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | KAGU Triple Layer Design | View on Amazon |
| 3D Fits: all 2021 S4 engines | L1AD0421150 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | KAGU Triple Layer Design2 Pieces | View on Amazon |
| VAICO Fits: all 2021 S4 engines | V107497 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | All-Weather Floor MatsRubber, Black, Front and Rear | View on Amazon |
| VAICO Fits: all 2021 S4 engines | V108886 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes: Set Front and Rear | View on Amazon |
This table covers the floor mats cut for this cabin.
5 Floor Mat parts are listed for the 2021 Audi S4, from 3D and VAICO. 3D L1AD0420150 carries the "Popular" badge. All of them fit every engine offered in the 2021 S4.
Listed part numbers: 3D L1AD0420150, 3D L1AD0422150 and 3D L1AD0421150, plus the other parts above.
Rain Sensor Pad
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRECISION Fits: all 2021 S4 engines | RSK1845 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Rain Sensor pads. Typical signs include squeal, grind, or a wear-indicator scrape. Replace pads as an axle set and inspect the rotor or drum they ride on.
This group shows a single part: PRECISION RSK1845.
Speaker Bracket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRA Fits: all 2021 S4 engines | 829105 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Speaker Adapter Bracket | View on Amazon |
This table covers the brackets that mount the Speaker. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners.
This group shows a single part: METRA 829105.
Sun Visor Bracket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS Fits: all 2021 S4 engines | 8W0857562A4PK | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Black | View on Amazon |
This table covers the brackets that mount the Sun Visor. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners.
This group shows a single part: ÜRO PARTS 8W0857562A4PK.
Window Regulator
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VAICO Fits: 3.0L V6 Turbocharged | V109111 | 🇺🇸 US | Front LeftFrom 03/06/2021 | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MARELLI Fits: 3.0L V6 Turbocharged | AC2123 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| MARELLI Fits: 3.0L V6 Turbocharged | AC2124 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| MARELLI Fits: 3.0L V6 Turbocharged | AC2125 | 🇺🇸 US 🇨🇦 CA | Rear Left | View on Amazon |
| MARELLI Fits: 3.0L V6 Turbocharged | AC2126 | 🇺🇸 US 🇨🇦 CA | Rear Right | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MARELLI Fits: 3.0L V6 Supercharged | AC2123 | 🇲🇽 MX | Front Left | View on Amazon |
| MARELLI Fits: 3.0L V6 Supercharged | AC2124 | 🇲🇽 MX | Front Right | View on Amazon |
| MARELLI Fits: 3.0L V6 Supercharged | AC2125 | 🇲🇽 MX | Rear Left | View on Amazon |
| MARELLI Fits: 3.0L V6 Supercharged | AC2126 | 🇲🇽 MX | Rear Right | View on Amazon |
This table covers the regulators that raise and lower each door glass.
9 Window Regulator parts for the 2021 Audi S4 come from 2 brands — MARELLI and VAICO.
The Economy section lists 1 option from VAICO — the catalog's value-priced group. VAICO V109111 is listed in this group.
In the Standard Replacement grade, MARELLI supplies 4 parts: built to original-equipment specification. A representative part number is MARELLI AC2123.
4 further parts sit outside the graded sections, with the same engine-level match.
Part numbers include VAICO V109111, MARELLI AC2123 and MARELLI AC2124, among others listed above.
Buying Interior Parts for a 2021 Audi S4
On this vehicle, the interior covers cabin hardware — seat components, handles, switch bezels, carpet, pedals and the pieces that take daily wear.
- Match the engine first. Some interior 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 the retainer clips with any panel removal — they are cheap insurance against squeaks.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Dash Board Cover and Window Regulator .
Frequently Asked Questions
How many interior parts fit the 2021 Audi S4?
Our catalog currently lists 32 interior parts for the 2021 Audi S4 across 7 subcategories and 7 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 interior parts differ between 2021 Audi S4 engines?
Some do. 23 parts fit every engine; the other 9 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 interior problems on a 2021 Audi S4?
Common symptoms include a door handle that works only from outside, sagging headliner, a window switch that needs two presses, or seat adjusters that stick. 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, replace the retainer clips with any panel removal — they are cheap insurance against squeaks.
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 interior plastics are often color- and trim-specific — check the notes column against your trim level before ordering. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Audi S4
Interior Parts for Other Audi S4 Years
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