The 2025 Audi A5 has 14 drivetrain parts with verified fitment on this page — 5 part types and 3 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2025 Audi A5, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. 12 parts of the 14 listed are Drive Shaft (6 parts), CV Joint Boot (3 parts) and Transfer Case Fluid (3 parts). The other 2 part types cover the remaining 2 parts.
The 2025 Audi A5 came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
3 brands supply drivetrain parts for the 2025 Audi A5, led by GKN (8 parts), VAICO (5 parts) and REIN (1 part).
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2025 Audi A5. 2 parts have it, including GKN GKNP20085 (Drive Shaft) and VAICO V107724 (Drive Shaft). Each part number opens a page with every vehicle that part fits.
CV Axle
| 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.
One part is listed for the 2025 Audi A5 — GKN GKND12939.
CV Joint
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN | 306277 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pre-lubricatedThermosplastic Elastomer (TPE) | View on Amazon |
This table covers the constant-velocity joints at each end of a drive axle.
One part is listed for the 2025 Audi A5 — GKN 306277.
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 | Front OuterA5 Sportback | 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.
3 CV Joint Boot parts are listed for the 2025 Audi A5, from GKN and REIN.
Listed part numbers: GKN 306313, GKN 306188 and REIN BKN0109.
Drive Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN Popular | GKNP20085 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | RearA5 Sportback | View on Amazon |
| VAICO Popular | V107724 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Description: Front Axle | View on Amazon |
| GKN | GKNP20091 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | RearA5 Sportback | View on Amazon |
| GKN | GKNP20136 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | RearA5 Sportback | View on Amazon |
| GKN | GKNP20148 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | RearA5 Sportback | View on Amazon |
| VAICO | V107729 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits A5 SportbackLength: 463 | View on Amazon |
This table covers the driveshafts that carry torque from the transmission or transfer case.
6 Drive Shaft parts for the 2025 Audi A5 come from 2 brands — GKN and VAICO. The "Popular" part is GKN GKNP20085.
Listed part numbers: GKN GKNP20085, VAICO V107724 and GKN GKNP20091, plus the other parts 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 | A5 SportbackGrade: AM | View on Amazon |
| VAICO | V600432 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | A5 SportbackGrade: OEM | 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 2025 Audi A5.
This group includes VAICO V600430, VAICO V600431 and VAICO V600432.
Buying Drivetrain Parts for a 2025 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: Drive Shaft and CV Joint Boot .
Frequently Asked Questions
How many drivetrain parts fit the 2025 Audi A5?
Our catalog currently lists 14 drivetrain parts for the 2025 Audi A5 across 5 subcategories and 3 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 2025 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 2025 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 2025 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 2025 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.