26 Drivetrain parts are listed for the 2021 Audi A5, in 7 part types, covering the 2.0L L4 Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 Audi A5, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. 17 parts of the 26 listed are CV Axle (7 parts), Drive Shaft (6 parts) and CV Joint Boot (4 parts). The other 4 part types cover the remaining 9 parts.
The 2021 Audi A5 came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
8 brands supply drivetrain parts for the 2021 Audi A5, led by GKN (10 parts), VAICO (5 parts) and GSP (4 parts), plus 5 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 A5. 2 parts have it, including TOP NOTCH TN19007PR (CV Axle) and GKN GKNP20085 (Drive Shaft). 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 🇲🇽 MX | Rear LeftA5 Quattro or A5 Sportback | View on Amazon |
| TIMKEN | SL260529 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear RightA5 Quattro or A5 Sportback | 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 A5.
Listed part numbers: TIMKEN SL260526 and TIMKEN SL260529.
CV Axle
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TOP NOTCH Popular | TN19007PR | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Performance | View on Amazon |
| GSP | PR23011 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Performance Revolution | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| APWI | AD8352 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | FrontA5 Quattro or A5 Sportback | View on Amazon |
| GKN | GKND12163 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Outboard Joint Type: Fix Ball Joint GKN SX | View on Amazon |
| GSP | NCV23011 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | FrontA5 Quattro or A5 Sportback | View on Amazon |
| TOP NOTCH | TN19007 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | FrontA5 Quattro or A5 Sportback | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN | GKND12939 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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 A5, 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.
Listed part numbers: TOP NOTCH TN19007PR, GSP PR23011 and APWI AD8352, plus the other parts above.
CV Joint
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN | 306280 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Thermosplastic Elastomer (TPE) | View on Amazon |
| GKN | 306277 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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 A5, from GKN and VAICO.
This group includes GKN 306280, GKN 306277 and VAICO V107738.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN | 306313 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OUTER Diameter 1.023 InThermoplastic Elastomer | View on Amazon |
| GKN | 306188 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OUTER Diameter 1.063 InThermoplastic Elastomer | View on Amazon |
| REIN | BKN0109 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Front OuterA5 Sportback | 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.
4 CV Joint Boot parts are listed for the 2021 Audi A5, from GKN, REIN and VAICO.
Part numbers include GKN 306313, GKN 306188 and REIN BKN0109, among others listed above.
Differential Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING | 852060 | 🇺🇸 US 🇲🇽 MX | Height [MM]: 7Radial Shaft Seal Design: AS2W | View on Amazon |
This table covers the seals at the Differential. 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.
This group shows a single part: ELRING 852060.
Drive Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN Popular | GKNP20085 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits RearAWD | View on Amazon |
| GKN | GKNP20091 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits RearAWD | View on Amazon |
| GKN | GKNP20136 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | RearAWD | View on Amazon |
| GKN | GKNP20148 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | RearAWD | View on Amazon |
| GSP | PS901876 | 🇺🇸 US | RearA5 Sportback | View on Amazon |
| GSP | PS901955 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | RearA5 Quattro | View on Amazon |
This table covers the driveshafts that carry torque from the transmission or transfer case.
6 Drive Shaft parts for the 2021 Audi A5 come from 2 brands — GKN and GSP. The "Popular" part is GKN GKNP20085.
Part numbers include GKN GKNP20085, GKN GKNP20091 and GKN GKNP20136, among others listed above.
Transfer Case Fluid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VAICO | V600430 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Transfer Case Oil DTF-1 L | View on Amazon |
| VAICO | V600431 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Grade: AMTransfer Case Fluid, DTF-1 - 5 Liter | View on Amazon |
| VAICO | V600432 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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 A5.
Part numbers include VAICO V600430, VAICO V600431 and VAICO V600432.
Buying Drivetrain Parts for a 2021 Audi A5
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 Drive Shaft .
Frequently Asked Questions
How many drivetrain parts fit the 2021 Audi A5?
Our catalog currently lists 26 drivetrain parts for the 2021 Audi A5 across 7 subcategories and 8 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 A5?
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 A5 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 A5?
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 A5
Drivetrain Parts for Other Audi A5 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.