The 2021 Audi SQ8 has 13 belt drive parts with verified fitment on this page — 2 part types and 7 brands, covering the 4.0L V8 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2021 Audi SQ8, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys. All 13 listed parts are Belt (9 parts) and Idler Pulley (4 parts).
The 2021 Audi SQ8 came with a single engine, the 4.0L V8 Turbocharged, and every part is verified against it.
7 brands supply belt drive parts for the 2021 Audi SQ8, led by CONTINENTAL (3 parts), DAYCO (3 parts) and GATES (3 parts), plus 4 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Audi SQ8. 2 parts have it, including DAYCO 5040430 (Belt) and DAYCO 5060353 (Belt). Each part number opens a page with every vehicle that part fits.
Belt
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL | 430K4MK | 🇺🇸 US 🇨🇦 CA | Mileage MakerSerpentine | View on Amazon |
| DAYCO | 5040430DR | 🇺🇸 US 🇨🇦 CA | Drive Rite®Serpentine | View on Amazon |
| FVP | 430K4 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| GATES | K060345 | 🇺🇸 US 🇨🇦 CA | Micro-V | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular | 5040430 | 🇺🇸 US 🇨🇦 CA | SerpentineTop Width: .54 In | View on Amazon |
| DAYCO Popular | 5060353 | 🇺🇸 US 🇨🇦 CA | SerpentineTop Width: .82 In | View on Amazon |
| ACDELCO | 4K423 | 🇺🇸 US 🇨🇦 CA | Professional / GoldSerpentine | View on Amazon |
| CONTINENTAL | 4040430 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| GATES | K040423 | 🇺🇸 US 🇨🇦 CA | Micro-V | View on Amazon |
This table covers the serpentine and accessory belts that drive the front accessories. Typical signs include squeal on cold start, cracks across the ribs, or glazing on the back of the belt. A new belt on a worn tensioner will squeal within weeks — spin the idlers by hand while the belt is off.
9 Belt parts for the 2021 Audi SQ8 come from 5 brands — DAYCO, CONTINENTAL, GATES and 2 other brands. The "Popular" part is DAYCO 5040430.
The Economy section lists 4 options from CONTINENTAL, DAYCO, FVP and 1 other brand — the catalog's value-priced group. CONTINENTAL 430K4MK is listed in this group.
In the Standard Replacement grade, DAYCO, ACDELCO, CONTINENTAL and 1 other brand supply 5 parts: built to original-equipment specification. A representative part number is DAYCO 5040430.
This group includes DAYCO 5040430, CONTINENTAL 430K4MK and DAYCO 5040430DR and the remaining parts above.
Idler Pulley
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VAICO | V108921 | 🇺🇸 US | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL | 50099 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| GATES | 36901 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| LITENS | 900699A | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
This table covers the idler pulleys the belt wraps around. Typical signs include a chirp that follows engine speed, or a pulley that feels rough or has play. Replace a noisy idler with the belt — the labor is already paid for.
4 Idler Pulley parts for the 2021 Audi SQ8 come from 4 brands — VAICO, CONTINENTAL, GATES and 1 other brand.
The Economy section: 1 option from VAICO. VAICO V108921 is listed in this group.
Standard Replacement: 3 parts, from CONTINENTAL, GATES and LITENS. A representative part number is CONTINENTAL 50099.
Part numbers include VAICO V108921, CONTINENTAL 50099 and GATES 36901, among others listed above.
Buying Belt Drive Parts for a 2021 Audi SQ8
On this vehicle, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.
- Confirm you have the 4.0L V8 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 the tensioner and idler pulleys with any belt at higher mileage — the labor overlaps almost entirely.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Belt and Idler Pulley .
Frequently Asked Questions
How many belt drive parts fit the 2021 Audi SQ8?
Our catalog currently lists 13 belt drive parts for the 2021 Audi SQ8 across 2 subcategories and 7 brands, covering the 4.0L V8 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of belt drive problems on a 2021 Audi SQ8?
Common symptoms include squealing on cold start, a belt that shows cracking or glazing, or an accessory that slows under load. 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 tensioner and idler pulleys with any belt at higher mileage — the labor overlaps almost entirely.
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 SQ8 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 SQ8?
Every part on this page is matched to the 4.0L V8 Turbocharged engine. Then a new belt on a worn tensioner will squeal within weeks — check tensioner damping and idler bearings while the belt is off. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Audi SQ8
Belt Drive Parts for Other Audi SQ8 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.