10 Drivetrain parts are listed for the 2021 BMW M4, in 7 part types, covering the 3.0L L6 Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 BMW M4, 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 Seal (2 parts) and Gear Oil (2 parts). The other 4 part types cover the remaining 4 parts.
The 2021 BMW M4 came with a single engine, the 3.0L L6 Turbocharged, and every part is verified against it.
6 brands supply drivetrain parts for the 2021 BMW M4, led by TIMKEN (2 parts), REIN (2 parts) and ELRING (2 parts), plus 3 more brands.
Each part number listed for the 2021 BMW M4 opens a page with every vehicle that part fits.
Axle Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TIMKEN | SL260496 | 🇺🇸 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.
One part is listed for the 2021 BMW M4 — TIMKEN SL260496.
CV Axle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GKN | GKND30034 | 🇺🇸 US 🇨🇦 CA | Rear Left | 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 2021 BMW M4 — GKN GKND30034.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 1032804 | 🇺🇸 US 🇨🇦 CA | Front OuterCompetition | 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.
One part is listed for the 2021 BMW M4 — BECK/ARNLEY 1032804.
Differential Fill / Drain Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN | HWP0065 | 🇺🇸 US 🇨🇦 CA | Rear DifferentialM22X1.5, Steel | View on Amazon |
| REIN | HWU0065 | 🇺🇸 US 🇨🇦 CA | Rear DifferentialM22X1.5, Aluminum | View on Amazon |
This table covers the Differential Fill drain plugs.
REIN supplies both parts for the 2021 BMW M4.
This group includes REIN HWP0065 and REIN HWU0065.
Differential Pinion Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TIMKEN | SL260527 | 🇺🇸 US 🇨🇦 CA | Rear | 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.
One part is listed for the 2021 BMW M4 — TIMKEN SL260527.
Differential Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING | 761160 | 🇺🇸 US 🇨🇦 CA | Material: ACM (Polyacrylate)Radial Shaft Seal Design: AS | View on Amazon |
| ELRING | B16790 | 🇺🇸 US 🇨🇦 CA | Material: AEM (Ethylene Acrylate Rubber)Swirl Type: Alternating Twist | 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 BMW M4 come from ELRING.
This group includes ELRING 761160 and ELRING B16790.
Gear Oil
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | 915052 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-85 Gear Oil1 Gallon | View on Amazon |
| VALVOLINE | 915053 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-85 Gear Oil1 Quart Flex Fill | 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.
VALVOLINE supplies both parts for the 2021 BMW M4.
Listed part numbers: VALVOLINE 915052 and VALVOLINE 915053.
Buying Drivetrain Parts for a 2021 BMW M4
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 3.0L L6 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 Seal .
Frequently Asked Questions
How many drivetrain parts fit the 2021 BMW M4?
Our catalog currently lists 10 drivetrain parts for the 2021 BMW M4 across 7 subcategories and 6 brands, covering the 3.0L L6 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 2021 BMW M4?
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 BMW M4 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 BMW M4?
Every part on this page is matched to the 3.0L L6 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 2021 BMW M4
Drivetrain Parts for Other BMW M4 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.