8 Drivetrain parts are listed for the 2018 Alfa Romeo 4C, in 5 part types, covering the 1.7L L4 Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The drivetrain system on the 2018 Alfa Romeo 4C moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. The largest groups are CV Joint Boot (3 parts), Drive Shaft Seal (2 parts) and Axle Shaft Bearing (1 part). The other 2 part types cover the remaining 2 parts.
The 2018 Alfa Romeo 4C came with a single engine, the 1.7L L4 Turbocharged, and every part is verified against it.
2 brands supply drivetrain parts for the 2018 Alfa Romeo 4C, led by MOPAR (7 parts) and GKN (1 part).
Each part number listed for the 2018 Alfa Romeo 4C opens a page with every vehicle that part fits.
Axle Shaft Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR | 68239983AA | 🇺🇸 US 🇨🇦 CA | Fits Rear1750 Model | View on Amazon |
This table covers the Axle Shaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
This group shows a single part: MOPAR 68239983AA.
CV Axle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR | 68238087AA | 🇺🇸 US 🇨🇦 CA | Fits Rear1750 Model | 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 2018 Alfa Romeo 4C — MOPAR 68238087AA.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN | 306760 | 🇺🇸 US 🇨🇦 CA | OUTER Diameter 1.102 InThermoplastic Elastomer | View on Amazon |
| MOPAR | 68173891AA | 🇺🇸 US 🇨🇦 CA | Fits Rear1750 Model | View on Amazon |
| MOPAR | 68189928AA | 🇺🇸 US 🇨🇦 CA | Fits Rear1750 Model | 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 2018 Alfa Romeo 4C, from MOPAR and GKN.
Listed part numbers: GKN 306760, MOPAR 68173891AA and MOPAR 68189928AA.
Differential Ring Gear
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR | 68347327AA | 🇺🇸 US 🇨🇦 CA | Fits 2 door Convertible6 Speed Auto/MAN Twin Clutch Trans | View on Amazon |
This table covers the Differential Ring gears.
This group shows a single part: MOPAR 68347327AA.
Drive Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR | 68151140AA | 🇺🇸 US 🇨🇦 CA | Axle Drive Shaft Seal | View on Amazon |
| MOPAR | 68119358AA | 🇺🇸 US 🇨🇦 CA | Axle Drive Shaft Seal | View on Amazon |
This table covers the seals at the Drive 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.
MOPAR supplies both parts for the 2018 Alfa Romeo 4C.
Listed part numbers: MOPAR 68151140AA and MOPAR 68119358AA.
Buying Drivetrain Parts for a 2018 Alfa Romeo 4C
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 1.7L 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 Joint Boot and Drive Shaft Seal .
Frequently Asked Questions
How many drivetrain parts fit the 2018 Alfa Romeo 4C?
Our catalog currently lists 8 drivetrain parts for the 2018 Alfa Romeo 4C across 5 subcategories and 2 brands, covering the 1.7L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 2018 Alfa Romeo 4C?
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 Alfa Romeo 4C 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 Alfa Romeo 4C?
Every part on this page is matched to the 1.7L 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 2018 Alfa Romeo 4C
Drivetrain Parts for Other Alfa Romeo 4C Years
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