The 2021 BMW M4 has 12 electrical parts with verified fitment on this page — 4 part types and 7 brands, covering the 3.0L L6 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2021 BMW M4, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. Most of the listed parts are Alternator / Generator (5 parts), Starter Motor (4 parts) and Lighting Control Module (LCM) (2 parts). The other 1 part type covers the remaining 1 part.
The 2021 BMW M4 came with a single engine, the 3.0L L6 Turbocharged, and every part is verified against it.
7 brands supply electrical parts for the 2021 BMW M4, led by VEMO (3 parts), WAI GLOBAL (2 parts) and PURE ENERGY (2 parts), plus 4 more brands. Quality grades include Remanufactured and New.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 BMW M4. 1 part has it: PURE ENERGY 14060 (Alternator / Generator). Each part number opens a page with every vehicle that part fits.
Alternator / Generator
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH | AL0794N | 🇺🇸 US 🇨🇦 CA | 250 Amps | View on Amazon |
| WAI GLOBAL | 21075N | 🇺🇸 US 🇨🇦 CA | 250 Amps | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PURE ENERGY Popular | 14060 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| FVP | 14060 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALEO | 443451 | 🇺🇸 US 🇨🇦 CA | 250 Amps | View on Amazon |
This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator.
5 Alternator / Generator parts for the 2021 BMW M4 come from 5 brands — BOSCH, WAI GLOBAL, PURE ENERGY and 2 other brands. The "Popular" part is PURE ENERGY 14060.
The New section lists 2 options from BOSCH and WAI GLOBAL — brand-new units rather than rebuilt ones. BOSCH AL0794N is listed in this group.
The Remanufactured section lists 2 options from PURE ENERGY and FVP — factory-rebuilt units with new wear components. PURE ENERGY 14060 is listed in this group.
1 further part sits outside the graded sections, with the same engine-level match.
Listed part numbers: PURE ENERGY 14060, BOSCH AL0794N and WAI GLOBAL 21075N, plus the other parts above.
Lighting Control Module (LCM)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V20730305 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| VEMO | V20730307 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the modules that control the exterior lighting.
2 Lighting Control Module (LCM) parts for the 2021 BMW M4 come from VEMO.
Listed part numbers: VEMO V20730305 and VEMO V20730307.
Rain Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V20720202 | 🇺🇸 US 🇨🇦 CA | Clipped | View on Amazon |
This table covers the Rain sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
This group shows a single part: VEMO V20720202.
Starter Motor
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL | 31413N | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | 12883 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| PURE ENERGY | 12883 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| REMY | 16420 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor.
4 Starter Motor parts for the 2021 BMW M4 come from 4 brands — WAI GLOBAL, FVP, PURE ENERGY and 1 other brand.
The New section: 1 option from WAI GLOBAL. WAI GLOBAL 31413N is listed in this group.
The Remanufactured section: 3 options from FVP, PURE ENERGY and REMY. FVP 12883 is listed in this group.
Part numbers include WAI GLOBAL 31413N and FVP 12883, among others listed above.
Buying Electrical Parts for a 2021 BMW M4
On this vehicle, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.
- 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, clean or renew the battery terminals and grounds with any charging-system repair.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Alternator / Generator and Starter Motor .
Frequently Asked Questions
How many electrical parts fit the 2021 BMW M4?
Our catalog currently lists 12 electrical parts for the 2021 BMW M4 across 4 subcategories and 7 brands, covering the 3.0L L6 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical problems on a 2021 BMW M4?
Common symptoms include slow cranking on cold mornings, a battery light that flickers, dim lights at idle, or a check-engine code pointing at a sensor circuit. 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, clean or renew the battery terminals and grounds with any charging-system repair.
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 test before replacing — a failed alternator and a bad ground can look identical, and sensors are frequently condemned for wiring faults. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 BMW M4
Electrical 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.