5 Drivetrain parts are listed for the 2021 Audi A1, in 2 part types, covering all 3 engine options (1.5L L4 Turbocharged, 2.0L L4 Turbocharged and 999cc L3 Turbocharged). Each one has a brand, a manufacturer part number and notes that say where it fits.
The drivetrain system on the 2021 Audi A1 moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. All 5 listed parts are Differential Seal (4 parts) and Transfer Case Input Shaft Seal (1 part).
The 2021 Audi A1 was sold with 3 engines. 1 part fits every engine; the other 4 are engine-specific. Each part shows which engine(s) it fits.
Every drivetrain part listed for the 2021 Audi A1 comes from ELRING.
Each part number listed for the 2021 Audi A1 opens a page with every vehicle that part fits.
Differential Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING Fits: all 2021 A1 engines | 454820 | 🇲🇽 MX | Inside Diameter: 60.0 mmOutside Diameter: 74.0 mm | View on Amazon |
| ELRING Fits: 2.0L L4 Turbocharged | 877460 | 🇲🇽 MX | Dust Cover: without dust LipSwirl Type: Alternating Twist | View on Amazon |
| ELRING Fits: 2.0L L4 Turbocharged | 871180 | 🇲🇽 MX | Dust Cover: with dust LipInner Diameter [MM]: 67 | View on Amazon |
| ELRING Fits: 2.0L L4 Turbocharged | 914240 | 🇲🇽 MX | Dust Cover: with dust LipHeight [MM]: 8 | 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.
4 Differential Seal parts for the 2021 Audi A1 come from ELRING. 1 part fits every engine; the other 3 are engine-specific.
Listed part numbers: ELRING 454820, ELRING 877460 and ELRING 871180, plus the other parts above.
Transfer Case Input Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING Fits: 2.0L L4 Turbocharged | 871070 | 🇲🇽 MX | Swirl Type: Left-hand Twist | View on Amazon |
This table covers the seals at the Transfer Case Input Shaft. 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 871070.
Buying Drivetrain Parts for a 2021 Audi A1
On this vehicle, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.
- Match the engine first. Some drivetrain 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 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: Differential Seal and Transfer Case Input Shaft Seal .
Frequently Asked Questions
How many drivetrain parts fit the 2021 Audi A1?
Our catalog currently lists 5 drivetrain parts for the 2021 Audi A1 across 2 subcategories and 1 brand, covering all 3 engine options (1.5L L4 Turbocharged, 2.0L L4 Turbocharged and 999cc L3 Turbocharged). Each part is matched to the engine(s) it fits.
Do drivetrain parts differ between 2021 Audi A1 engines?
Some do. 1 part fits every engine; the other 4 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 drivetrain problems on a 2021 Audi A1?
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 A1 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 A1?
First match the engine — each row shows which engine(s) the part fits. 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 A1
Drivetrain Parts for Other Audi A1 Years
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