The 2021 Audi A4 Allroad has 26 drivetrain parts with verified fitment on this page — 6 part types and 10 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2021 Audi A4 Allroad, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. 18 parts of the 26 listed are CV Axle (7 parts), CV Joint Boot (6 parts) and Drive Shaft (5 parts). The other 3 part types cover the remaining 8 parts.
The 2021 Audi A4 Allroad came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
10 brands supply drivetrain parts for the 2021 Audi A4 Allroad, led by GKN (9 parts), VAICO (6 parts) and TIMKEN (2 parts), plus 7 more brands. Quality grades include Standard Replacement and Premium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Audi A4 Allroad. 3 parts have it, including TOP NOTCH TN19007PR (CV Axle) and BECK/ARNLEY 1033141 (CV Joint Boot). Each part number opens a page with every vehicle that part fits.
Axle Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TIMKEN | SL260526 | 🇺🇸 US 🇨🇦 CA | Rear Left | View on Amazon |
| TIMKEN | SL260529 | 🇺🇸 US 🇨🇦 CA | Rear Right | View on Amazon |
This table covers the seals where an axle shaft exits the housing. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
TIMKEN supplies both parts for the 2021 Audi A4 Allroad.
Part numbers include TIMKEN SL260526 and TIMKEN SL260529.
CV Axle
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TOP NOTCH Popular | TN19007PR | 🇺🇸 US 🇨🇦 CA | Performance | View on Amazon |
| GSP | PR23011 | 🇺🇸 US 🇨🇦 CA | Performance Revolution | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| APWI | AD8352 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
| GKN | GKND12163 | 🇺🇸 US 🇨🇦 CA | Outboard Joint Type: Fix Ball Joint GKN SX | View on Amazon |
| GSP | NCV23011 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
| TOP NOTCH | TN19007 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN | GKND12939 | 🇺🇸 US 🇨🇦 CA | Outboard Joint Type: Fix Ball Joint SX | View on Amazon |
This table covers the complete CV axle shafts from differential (or hub) to wheel. Typical signs include a click in tight turns, grease flung around the wheel well, or a vibration that builds with speed. A torn boot caught early is a boot kit; caught late it is the whole axle. Torque the axle nut to the method in the notes.
7 CV Axle parts are listed for the 2021 Audi A4 Allroad, from TOP NOTCH, GSP, GKN and 1 other brand. TOP NOTCH TN19007PR carries the "Popular" badge.
The Premium section lists 2 options from TOP NOTCH and GSP — a step above OE specification in materials, tolerances or warranty terms. TOP NOTCH TN19007PR is listed in this group.
The Standard Replacement section lists 4 options from APWI, GKN, GSP and 1 other brand — built to original-equipment specification. APWI AD8352 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Part numbers include TOP NOTCH TN19007PR, GSP PR23011 and APWI AD8352, among others listed above.
CV Joint
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN | 306280 | 🇺🇸 US 🇨🇦 CA | Thermosplastic Elastomer (TPE) | View on Amazon |
| GKN | 306277 | 🇺🇸 US 🇨🇦 CA | Pre-lubricatedThermosplastic Elastomer (TPE) | View on Amazon |
| VAICO | V107738 | 🇺🇸 US | Front Inner | View on Amazon |
This table covers the constant-velocity joints at each end of a drive axle.
3 CV Joint parts are listed for the 2021 Audi A4 Allroad, from GKN and VAICO.
Listed part numbers: GKN 306280, GKN 306277 and VAICO V107738.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Popular | 1033141 | 🇺🇸 US 🇨🇦 CA | Front Outer | View on Amazon |
| GKN | 306619 | 🇺🇸 US 🇨🇦 CA | Thermoplastic ElastomerThermosplastic Elastomer (TPE) | View on Amazon |
| GKN | 306313 | 🇺🇸 US 🇨🇦 CA | OUTER Diameter 1.023 InThermoplastic Elastomer | View on Amazon |
| GKN | 306188 | 🇺🇸 US 🇨🇦 CA | OUTER Diameter 1.063 InThermoplastic Elastomer | View on Amazon |
| REIN | BKN0109 | 🇺🇸 US 🇨🇦 CA | Front Outer | View on Amazon |
| VAICO | V105635 | 🇺🇸 US | Front OuterGrade: AM | View on Amazon |
This table covers the boots that keep grease in a CV joint. Typical signs include a split boot, grease flung around the joint, or a click once grit is inside. A boot caught early is a kit. Once the joint has clicked, the joint itself is usually worn.
6 CV Joint Boot parts are listed for the 2021 Audi A4 Allroad, from GKN, BECK/ARNLEY, REIN and 1 other brand. BECK/ARNLEY 1033141 carries the "Popular" badge.
Listed part numbers: BECK/ARNLEY 1033141, GKN 306619 and GKN 306313, plus the other parts above.
Drive Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN Popular | GKNP20085 | 🇺🇸 US 🇨🇦 CA | RearBasic Rear Differential | View on Amazon |
| DORMAN | 986581 | 🇺🇸 US 🇨🇦 CA | Length: 65.75" | View on Amazon |
| GKN | GKNP20091 | 🇺🇸 US 🇨🇦 CA | Rearwith uncoupling rear differential | View on Amazon |
| VAICO | V107729 | 🇺🇸 US 🇨🇦 CA | Length: 463From 01/25/2016 | View on Amazon |
| WJB / INMOTION PARTS | WDS86581 | 🇺🇸 US 🇨🇦 CA | Rearwith PR Code GH1 (Basic Rear Differential) | View on Amazon |
This table covers the driveshafts that carry torque from the transmission or transfer case.
5 Drive Shaft parts for the 2021 Audi A4 Allroad come from 4 brands — GKN, DORMAN, VAICO and 1 other brand. The "Popular" part is GKN GKNP20085.
This group includes GKN GKNP20085, DORMAN 986581 and GKN GKNP20091 and the remaining parts above.
Transfer Case Fluid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VAICO | V600430 | 🇺🇸 US 🇨🇦 CA | Transfer Case Oil DTF-1 L | View on Amazon |
| VAICO | V600431 | 🇺🇸 US 🇨🇦 CA | Grade: AMTransfer Case Fluid, DTF-1 - 5 Liter | View on Amazon |
| VAICO | V600432 | 🇺🇸 US 🇨🇦 CA | Grade: OEMTransfer Case Oil DTF-1-20 L | View on Amazon |
This table covers the fluids specified for the transfer case. Typical signs include discolored fluid, a burnt smell, or a level that keeps dropping. Use only the specification in the notes — the tables group grades because they are not interchangeable.
VAICO supplies the 3 Transfer Case Fluid parts for the 2021 Audi A4 Allroad.
This group includes VAICO V600430, VAICO V600431 and VAICO V600432.
Buying Drivetrain Parts for a 2021 Audi A4 Allroad
On this vehicle, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.
- 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 the differential or transfer-case fluid with any axle or seal job while everything is already open.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: CV Axle and CV Joint Boot .
Frequently Asked Questions
How many drivetrain parts fit the 2021 Audi A4 Allroad?
Our catalog currently lists 26 drivetrain parts for the 2021 Audi A4 Allroad across 6 subcategories and 10 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 2021 Audi A4 Allroad?
Common symptoms include clicking in tight turns, a clunk when shifting between drive and reverse, vibration that builds with speed, or gear oil on the inside of a wheel. 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 differential or transfer-case fluid with any axle or seal job while everything is already open.
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 Allroad 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 Allroad?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then a torn CV boot caught early is a cheap boot kit; caught late it is a whole axle — inspect before deciding which to buy. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Audi A4 Allroad
Drivetrain Parts for Other Audi A4 Allroad 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.