30 Drivetrain parts are listed for the 2021 Alfa Romeo Giulia, in 8 part types, covering both the 2.0L L4 Turbocharged and the 2.9L V6 Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 Alfa Romeo Giulia, 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 Joint Boot (7 parts), Drive Shaft (6 parts) and Gear Oil (6 parts). The other 5 part types cover the remaining 11 parts.
The 2021 Alfa Romeo Giulia was sold with both the 2.0L L4 Turbocharged and the 2.9L V6 Turbocharged. 9 parts fit every engine; the other 21 are engine-specific. Each part shows which engine(s) it fits.
6 brands supply drivetrain parts for the 2021 Alfa Romeo Giulia, led by MOPAR (21 parts), VALVOLINE (4 parts) and GKN (2 parts), plus 3 more brands.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Alfa Romeo Giulia. 2 parts have it, including VALVOLINE VV975 (Gear Oil) and VALVOLINE 889785 (Gear Oil). Each part number opens a page with every vehicle that part fits.
4WD Actuator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 2.9L V6 Turbocharged | 68315252AA | 🇺🇸 US 🇨🇦 CA | LeftTwin PDI Engine with Engine Stop-Start (ESS) | View on Amazon |
| MOPAR Fits: 2.9L V6 Turbocharged | 68315367AA | 🇺🇸 US 🇨🇦 CA | RightTwin PDI Engine with Engine Stop-Start (ESS) | View on Amazon |
This table covers the actuators that engage four-wheel drive at the transfer case or axle. Typical signs include a door or range that will not move, or a click with no motion. Confirm the command signal before replacing the actuator — a failed module looks the same.
2 4WD Actuator parts for the 2021 Alfa Romeo Giulia come from MOPAR.
Part numbers include MOPAR 68315252AA and MOPAR 68315367AA.
CV Axle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 2.0L L4 Turbocharged | 68529610AA | 🇺🇸 US 🇨🇦 CA | RearMair so DI Engine with Engine Stop-Start (ESS) | View on Amazon |
| MOPAR Fits: 2.0L L4 Turbocharged | 68529618AA | 🇺🇸 US 🇨🇦 CA | Fits FrontLeft | View on Amazon |
| MOPAR Fits: 2.0L L4 Turbocharged | 68757423AA | 🇺🇸 US 🇨🇦 CA | Fits FrontRight | View on Amazon |
| MOPAR Fits: 2.9L V6 Turbocharged | 68361428AA | 🇺🇸 US 🇨🇦 CA | RearTwin PDI Engine with Engine Stop-Start (ESS) | 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.
MOPAR supplies the 4 CV Axle parts for the 2021 Alfa Romeo Giulia.
Listed part numbers: MOPAR 68529610AA, MOPAR 68529618AA and MOPAR 68757423AA, plus the other parts above.
CV Joint
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN Fits: 2.0L L4 Turbocharged | GKNJ30032 | 🇺🇸 US 🇨🇦 CA | Front OuterAWD | View on Amazon |
This table covers the constant-velocity joints at each end of a drive axle.
One part is listed for the 2021 Alfa Romeo Giulia — GKN GKNJ30032.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN Fits: 2.0L L4 Turbocharged | GKNB20592 | 🇺🇸 US 🇨🇦 CA | OUTER Diameter 0.984 InThermoplastic Elastomer | View on Amazon |
| MOPAR Fits: 2.0L L4 Turbocharged | 68312388AA | 🇺🇸 US 🇨🇦 CA | Fits RearMair so DI Engine with Engine Stop-Start (ESS) | View on Amazon |
| MOPAR Fits: 2.0L L4 Turbocharged | 68312389AA | 🇺🇸 US 🇨🇦 CA | Fits RearMair so DI Engine with Engine Stop-Start (ESS) | View on Amazon |
| MOPAR Fits: 2.0L L4 Turbocharged | 68321248AA | 🇺🇸 US 🇨🇦 CA | FrontMair so DI Engine with Engine Stop-Start (ESS) | View on Amazon |
| MOPAR Fits: 2.0L L4 Turbocharged | 68321279AA | 🇺🇸 US 🇨🇦 CA | Front Right & LeftMair so DI Engine with Engine Stop-Start (ESS) | View on Amazon |
| MOPAR Fits: 2.9L V6 Turbocharged | 68312327AA | 🇺🇸 US 🇨🇦 CA | RearTwin PDI Engine with Engine Stop-Start (ESS) | View on Amazon |
| MOPAR Fits: 2.9L V6 Turbocharged | 68312380AA | 🇺🇸 US 🇨🇦 CA | RearTwin PDI Engine with Engine Stop-Start (ESS) | 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.
7 CV Joint Boot parts are listed for the 2021 Alfa Romeo Giulia, from MOPAR and GKN.
This group includes GKN GKNB20592, MOPAR 68312388AA and MOPAR 68312389AA and the remaining parts above.
Differential Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: all 2021 Giulia engines | 68364116AA | 🇺🇸 US 🇨🇦 CA | Fits FrontMair so DI Engine with Engine Stop-Start (ESS) | View on Amazon |
| MOPAR Fits: all 2021 Giulia engines | 68364119AA | 🇺🇸 US 🇨🇦 CA | Fits FrontMair so DI Engine with Engine Stop-Start (ESS) | 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.
2 Differential Seal parts for the 2021 Alfa Romeo Giulia come from MOPAR. Every part fits both the 2.0L L4 Turbocharged and the 2.9L V6 Turbocharged.
Part numbers include MOPAR 68364116AA and MOPAR 68364119AA.
Drive Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GSP Fits: 2.0L L4 Turbocharged | PS901909 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front | View on Amazon |
| MOPAR Fits: 2.0L L4 Turbocharged | 68340365AA | 🇺🇸 US 🇨🇦 CA | Mair so DI Engine with Engine Stop-Start (ESS)Drive Shaft, Rear | View on Amazon |
| MOPAR Fits: 2.0L L4 Turbocharged | 68490106AA | 🇺🇸 US 🇨🇦 CA | Mair so DI Engine with Engine Stop-Start (ESS)Drive Shaft, Rear | View on Amazon |
| MOPAR Fits: 2.0L L4 Turbocharged | 68518833AA | 🇺🇸 US 🇨🇦 CA | 1-Piece | View on Amazon |
| MOPAR Fits: 2.9L V6 Turbocharged | 68340369AA | 🇺🇸 US 🇨🇦 CA | Twin PDI Engine with Engine Stop-Start (ESS)Drive Shaft, Rear | View on Amazon |
| TOP NOTCH Fits: 2.0L L4 Turbocharged | TN10010PS | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front | View on Amazon |
This table covers the driveshafts that carry torque from the transmission or transfer case.
6 Drive Shaft parts for the 2021 Alfa Romeo Giulia come from 3 brands — MOPAR, GSP and TOP NOTCH.
Listed part numbers: GSP PS901909, MOPAR 68340365AA and MOPAR 68490106AA, plus the other parts above.
Drive Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING Fits: 2.0L L4 Turbocharged | B15590 | 🇺🇸 US 🇨🇦 CA | RWDTI Sport | View on Amazon |
| MOPAR Fits: all 2021 Giulia engines | 68364120AA | 🇺🇸 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.
2 Drive Shaft Seal parts are listed for the 2021 Alfa Romeo Giulia, from ELRING and MOPAR. 1 part fits every engine; the other 1 is engine-specific.
Listed part numbers: ELRING B15590 and MOPAR 68364120AA.
Gear Oil
SAE 75W-85
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: all 2021 Giulia engines | 68232948AB | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| MOPAR Fits: all 2021 Giulia engines | 68083381AA | 🇺🇸 US 🇨🇦 CA | View on Amazon |
SAE 75W-90
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: all 2021 Giulia engines | VV975 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart | View on Amazon |
| VALVOLINE Popular Fits: all 2021 Giulia engines | 889785 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill | View on Amazon |
| VALVOLINE Fits: all 2021 Giulia engines | 882505 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon | View on Amazon |
| VALVOLINE Fits: all 2021 Giulia engines | 723856 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon | View on Amazon |
This table covers the gear oils specified for the axle or transfer case. Typical signs include a low-oil lamp, knocking, or oil that has gone thin before the next interval. Match the viscosity and spec in the notes, not just the weight on the bottle.
6 Gear Oil parts are listed for the 2021 Alfa Romeo Giulia, from VALVOLINE and MOPAR. VALVOLINE VV975 carries the "Popular" badge. All of them fit every engine offered in the 2021 Giulia.
In the SAE 75W-85 grade, MOPAR supplies 2 parts: grouped under the catalog's "SAE 75W-85" designation — the notes column spells out what sets them apart. A representative part number is MOPAR 68232948AB.
In the SAE 75W-90 grade, VALVOLINE supplies 4 parts: grouped under the catalog's "SAE 75W-90" designation — the notes column spells out what sets them apart. A representative part number is VALVOLINE VV975.
This group includes VALVOLINE VV975, MOPAR 68232948AB and MOPAR 68083381AA and the remaining parts above.
Buying Drivetrain Parts for a 2021 Alfa Romeo Giulia
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: CV Joint Boot and Drive Shaft .
Frequently Asked Questions
How many drivetrain parts fit the 2021 Alfa Romeo Giulia?
Our catalog currently lists 30 drivetrain parts for the 2021 Alfa Romeo Giulia across 8 subcategories and 6 brands, covering both the 2.0L L4 Turbocharged and the 2.9L V6 Turbocharged. Each part is matched to the engine(s) it fits.
Do drivetrain parts differ between 2021 Alfa Romeo Giulia engines?
Some do. 9 parts fit every engine; the other 21 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 Alfa Romeo Giulia?
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 Alfa Romeo Giulia 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 Alfa Romeo Giulia?
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 Alfa Romeo Giulia
Drivetrain Parts for Other Alfa Romeo Giulia Years
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