16 Drivetrain parts are listed for the 2018 Audi S4, in 5 part types, covering both the 3.0L V6 Supercharged and the 3.0L V6 Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2018 Audi S4, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. Most of the listed parts are CV Axle (6 parts), CV Joint Boot (4 parts) and Drive Shaft (4 parts). The other 2 part types cover the remaining 2 parts.
The 2018 Audi S4 was sold with both the 3.0L V6 Supercharged and the 3.0L V6 Turbocharged. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2018 Audi S4 drivetrain parts are GKN (5 parts), TOP NOTCH (3 parts) and GSP (3 parts), plus 5 more brands. Quality grades include Standard Replacement and Premium.
1 part on this 2018 Audi S4 page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — TOP NOTCH TN19007PR (CV Axle). Click any part number to see every vehicle that part fits.
Axle Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TIMKEN Fits: 3.0L V6 Supercharged | SL260517 | 🇲🇽 MX | RearExcept Active Differential | 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.
This group shows a single part: TIMKEN SL260517.
CV Axle
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TOP NOTCH Popular Fits: 3.0L V6 Supercharged | TN19007PR | 🇲🇽 MX | Performance | View on Amazon |
| GSP Fits: 3.0L V6 Supercharged | PR23011 | 🇲🇽 MX | Performance Revolution | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| APWI Fits: 3.0L V6 Supercharged | AD8352 | 🇲🇽 MX | Front | View on Amazon |
| GSP Fits: 3.0L V6 Supercharged | NCV23011 | 🇲🇽 MX | Front | View on Amazon |
| TOP NOTCH Fits: 3.0L V6 Supercharged | TN19007 | 🇲🇽 MX | Front | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN Fits: 3.0L V6 Supercharged | GKND12939 | 🇲🇽 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.
6 CV Axle parts for the 2018 Audi S4 come from 4 brands — TOP NOTCH, GSP, APWI and 1 other brand. The "Popular" part is TOP NOTCH TN19007PR.
In the Premium grade, TOP NOTCH and GSP supply 2 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is TOP NOTCH TN19007PR.
In the Standard Replacement grade, APWI, GSP and TOP NOTCH supply 3 parts: built to original-equipment specification. A representative part number is APWI AD8352.
1 further part sits outside the graded sections, with the same engine-level match.
This group includes TOP NOTCH TN19007PR, GSP PR23011 and APWI AD8352 and the remaining parts above.
CV Joint
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN Fits: 3.0L V6 Supercharged | 306277 | 🇲🇽 MX | Pre-lubricatedThermosplastic Elastomer (TPE) | View on Amazon |
This table covers the constant-velocity joints at each end of a drive axle.
This group shows a single part: GKN 306277.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 3.0L V6 Supercharged | 1033141 | 🇲🇽 MX | Front Outer | View on Amazon |
| GKN Fits: 3.0L V6 Supercharged | 306313 | 🇲🇽 MX | OUTER Diameter 1.023 InThermoplastic Elastomer | View on Amazon |
| GKN Fits: 3.0L V6 Supercharged | 306188 | 🇲🇽 MX | OUTER Diameter 1.063 InThermoplastic Elastomer | View on Amazon |
| REIN Fits: 3.0L V6 Supercharged | BKN0109 | 🇲🇽 MX | Front Outer | 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 for the 2018 Audi S4 come from 3 brands — GKN, BECK/ARNLEY and REIN.
This group includes BECK/ARNLEY 1033141, GKN 306313 and GKN 306188 and the remaining parts above.
Drive Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN Fits: 3.0L V6 Supercharged | GKNP20093 | 🇲🇽 MX | View on Amazon | |
| GSP Fits: 3.0L V6 Supercharged | PS901720 | 🇲🇽 MX | Rear | View on Amazon |
| TOP NOTCH Fits: 3.0L V6 Supercharged | TN2338PS | 🇲🇽 MX | Rear | View on Amazon |
| VAICO Fits: 3.0L V6 Supercharged | V107729 | 🇲🇽 MX | Length: 463From 01/25/2016 | View on Amazon |
This table covers the driveshafts that carry torque from the transmission or transfer case.
4 Drive Shaft parts are listed for the 2018 Audi S4, from GKN, GSP, TOP NOTCH and 1 other brand.
This group includes GKN GKNP20093, GSP PS901720 and TOP NOTCH TN2338PS and the remaining parts above.
Buying Drivetrain Parts for a 2018 Audi S4
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. Every drivetrain part here is 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: CV Axle and CV Joint Boot .
Frequently Asked Questions
How many drivetrain parts fit the 2018 Audi S4?
Our catalog currently lists 16 drivetrain parts for the 2018 Audi S4 across 5 subcategories and 8 brands, covering both the 3.0L V6 Supercharged and the 3.0L V6 Turbocharged. Each part is matched to the engine(s) it fits.
Do drivetrain parts differ between 2018 Audi S4 engines?
Yes. Every drivetrain part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. 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 2018 Audi S4?
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 2018 Audi S4 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 2018 Audi S4?
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 2018 Audi S4
Drivetrain Parts for Other Audi S4 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.