This page lists 7 drivetrain parts for the 2026 BMW 330I, across 5 part types, covering the 2.0L L4 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2026 BMW 330I, 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 Differential Fill / Drain Plug (2 parts), Differential Pinion Seal (2 parts) and Axle Shaft Seal (1 part). The other 2 part types cover the remaining 2 parts.
Every part on this page is matched to the 2.0L L4 Turbocharged — the only engine offered in the 2026 BMW 330I.
The most listed brands for 2026 BMW 330I drivetrain parts are AJUSA (4 parts), REIN (2 parts) and ELRING (1 part).
Each part number listed for the 2026 BMW 330I opens a page with every vehicle that part fits.
Axle Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 12021750 | 🇺🇸 US 🇨🇦 CA | Rear | 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: AJUSA 12021750.
Differential Cover Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 16031150 | 🇺🇸 US 🇨🇦 CA | Front330i xDrive | View on Amazon |
This table covers the gaskets that seal the Differential Cover. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
This group shows a single part: AJUSA 16031150.
Differential Fill / Drain Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN | HWP0065 | 🇺🇸 US 🇨🇦 CA | Fits Rear DifferentialM22X1.5, Steel | View on Amazon |
| REIN | HWU0065 | 🇺🇸 US 🇨🇦 CA | Fits Rear DifferentialM22X1.5, Aluminum | View on Amazon |
This table covers the Differential Fill drain plugs.
2 Differential Fill / Drain Plug parts for the 2026 BMW 330I come from REIN.
Listed part numbers: REIN HWP0065 and REIN HWU0065.
Differential Pinion Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 12005350 | 🇺🇸 US 🇨🇦 CA | Rear45x75x10mm | View on Amazon |
| AJUSA | 12015650 | 🇺🇸 US 🇨🇦 CA | Front330i xDrive | View on Amazon |
This table covers the seals at the differential pinion yoke. 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 Pinion Seal parts for the 2026 BMW 330I come from AJUSA.
Part numbers include AJUSA 12005350 and AJUSA 12015650.
Differential Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING | B46610 | 🇺🇸 US 🇨🇦 CA | Material: ACM (Polyacrylate)Radial Shaft Seal Design: AwithBS2 | 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.
One part is listed for the 2026 BMW 330I — ELRING B46610.
Buying Drivetrain Parts for a 2026 BMW 330I
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: Differential Fill / Drain Plug and Differential Pinion Seal .
Frequently Asked Questions
How many drivetrain parts fit the 2026 BMW 330I?
Our catalog currently lists 7 drivetrain parts for the 2026 BMW 330I 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 2026 BMW 330I?
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 2026 BMW 330I 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 2026 BMW 330I?
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 2026 BMW 330I
Drivetrain Parts for Other BMW 330I 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.