The 2020 BMW I3S has 10 drivetrain parts with verified fitment on this page — 5 part types and 5 brands, covering both the 647cc L2 ELECTRIC and the 647cc L2 ELECTRIC/GAS. Each part includes a manufacturer part number and application notes.
On the 2020 BMW I3S, 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 (4 parts), Differential Seal (2 parts) and Transfer Case Oil Drain Plug (2 parts). The other 2 part types cover the remaining 2 parts.
The 2020 BMW I3S was sold with both the 647cc L2 ELECTRIC and the 647cc L2 ELECTRIC/GAS. 7 parts fit every engine; the other 3 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2020 BMW I3S drivetrain parts are ELRING (3 parts), GSP (2 parts) and TOP NOTCH (2 parts), plus 2 more brands.
Each part number listed for the 2020 BMW I3S opens a page with every vehicle that part fits.
Axle Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TIMKEN Fits: all 2020 I3S engines | SL260162 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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: TIMKEN SL260162.
CV Axle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GSP Fits: all 2020 I3S engines | NCV27068 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Left | View on Amazon |
| GSP Fits: all 2020 I3S engines | NCV27069 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Right | View on Amazon |
| TOP NOTCH Fits: all 2020 I3S engines | TN10058 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Left | View on Amazon |
| TOP NOTCH Fits: all 2020 I3S engines | TN10059 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Right | 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.
4 CV Axle parts for the 2020 BMW I3S come from 2 brands — GSP and TOP NOTCH. Every part fits both the 647cc L2 ELECTRIC and the 647cc L2 ELECTRIC/GAS.
Listed part numbers: GSP NCV27068, GSP NCV27069 and TOP NOTCH TN10058, plus the other parts above.
Differential Gear Installation Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING Fits: all 2020 I3S engines | B16800 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Differential Gear Installation kits.
One part is listed for the 2020 BMW I3S — ELRING B16800.
Differential Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING Fits: all 2020 I3S engines | B16790 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Material: AEM (Ethylene Acrylate Rubber)Swirl Type: Alternating Twist | View on Amazon |
| ELRING Fits: 647cc L2 ELECTRIC/GAS | 761160 | 🇺🇸 US 🇨🇦 CA | Material: ACM (Polyacrylate)Radial Shaft Seal Design: AS | 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.
ELRING supplies both parts for the 2020 BMW I3S. 1 part fits every engine; the other 1 is engine-specific.
This group includes ELRING B16790 and ELRING 761160.
Transfer Case Oil Drain Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN Fits: 647cc L2 ELECTRIC/GAS | HWP0065 | 🇺🇸 US 🇨🇦 CA | M22x1.5, Steel | View on Amazon |
| REIN Fits: 647cc L2 ELECTRIC/GAS | HWU0065 | 🇺🇸 US 🇨🇦 CA | M22x1.5, Aluminum | View on Amazon |
This table covers the Transfer Case Oil drain plugs.
2 Transfer Case Oil Drain Plug parts for the 2020 BMW I3S come from REIN.
Listed part numbers: REIN HWP0065 and REIN HWU0065.
Buying Drivetrain Parts for a 2020 BMW I3S
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 Axle and Differential Seal .
Frequently Asked Questions
How many drivetrain parts fit the 2020 BMW I3S?
Our catalog currently lists 10 drivetrain parts for the 2020 BMW I3S across 5 subcategories and 5 brands, covering both the 647cc L2 ELECTRIC and the 647cc L2 ELECTRIC/GAS. Each part is matched to the engine(s) it fits.
Do drivetrain parts differ between 2020 BMW I3S engines?
Some do. 7 parts fit every engine; the other 3 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 2020 BMW I3S?
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 2020 BMW I3S 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 2020 BMW I3S?
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 2020 BMW I3S
Drivetrain Parts for Other BMW I3S Years
Switch vehicle or jump to a subcategory
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.