20 Suspension parts are listed for the 2021 BMW M4, in 6 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 suspension system controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links. 14 parts of the 20 listed are Control Arm (5 parts), Shock / Strut (5 parts) and Control Arm Bushing (4 parts). The other 3 part types cover the remaining 6 parts.
Every part on this page is matched to the 3.0L L6 Turbocharged — the only engine offered in the 2021 BMW M4.
The most listed brands for 2021 BMW M4 suspension parts are LEMFÖRDER (4 parts), SACHS (3 parts) and BILSTEIN (3 parts), plus 7 more brands. Quality grades include Daily Driver and Economy.
2 parts on this 2021 BMW M4 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including DELPHI TC7027 (Control Arm) and SACHS 319242 (Shock / Strut). Click any part number to see every vehicle that part fits.
Control Arm
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DELPHI Popular | TC7027 | 🇺🇸 US 🇨🇦 CA | RearLateral Arm | View on Amazon |
| DELPHI | TC3865 | 🇺🇸 US 🇨🇦 CA | Complete Arm with Ball Joint | View on Amazon |
| LEMFÖRDER | 3864601 | 🇺🇸 US 🇨🇦 CA | Rear CenterBushings | View on Amazon |
| LEMFÖRDER | 4444501 | 🇺🇸 US 🇨🇦 CA | Front Left ForwardBall Joint and Bushing | View on Amazon |
| LEMFÖRDER | 4444601 | 🇺🇸 US 🇨🇦 CA | Front Right ForwardBall Joint and Bushing | View on Amazon |
This table covers the control arms that locate each hub relative to the chassis. Typical signs include clunks over bumps, a wander on the highway, or inner-edge tire wear. Get an alignment after any control-arm work, and inspect the ball joint and bushings that came with the arm.
5 Control Arm parts for the 2021 BMW M4 come from 2 brands — LEMFÖRDER and DELPHI. The "Popular" part is DELPHI TC7027.
Listed part numbers: DELPHI TC7027, DELPHI TC3865 and LEMFÖRDER 3864601, plus the other parts above.
Control Arm Bushing
Daily Driver
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| LEMFÖRDER | 3468401 | 🇺🇸 US 🇨🇦 CA | Rear Lower Inner Rearward | View on Amazon |
| MOOG | K201291 | 🇺🇸 US 🇨🇦 CA | Rear Arm To Knuckle (Lower Outer) | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN | AVB0571 | 🇺🇸 US 🇨🇦 CA | Rear Lower Center Outer | View on Amazon |
| REIN | AVB0537 | 🇺🇸 US 🇨🇦 CA | Rear Lower Center Inner | View on Amazon |
This table covers the bushings pressed into each control arm. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.
4 Control Arm Bushing parts for the 2021 BMW M4 come from 3 brands — REIN, LEMFÖRDER and MOOG.
In the Daily Driver grade, LEMFÖRDER and MOOG supply 2 parts: grouped for everyday commuting duty. A representative part number is LEMFÖRDER 3468401.
The Economy section lists 2 options from REIN — the catalog's value-priced group. REIN AVB0571 is listed in this group.
Part numbers include LEMFÖRDER 3468401, MOOG K201291 and REIN AVB0571, among others listed above.
Ride Height Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARNOTT | RH3718 | 🇺🇸 US 🇨🇦 CA | Fits Rear | View on Amazon |
| FCS | HS008 | 🇺🇸 US 🇨🇦 CA | Fits Rear | View on Amazon |
| MONROE | HS10203 | 🇺🇸 US 🇨🇦 CA | Fits Frontwith Air Suspension | View on Amazon |
This table covers the Ride Height 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.
3 Ride Height Sensor parts for the 2021 BMW M4 come from 3 brands — ARNOTT, FCS and MONROE.
This group includes ARNOTT RH3718, FCS HS008 and MONROE HS10203.
Shock / Strut
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SACHS Popular | 319242 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| BILSTEIN | 26320502 | 🇺🇸 US 🇨🇦 CA | B4 OE Replacement (Damp Tronic) | View on Amazon |
| BILSTEIN | 26345901 | 🇺🇸 US 🇨🇦 CA | B4 OE Replacement (Damp Tronic) | View on Amazon |
| SACHS | 319239 | 🇺🇸 US 🇨🇦 CA | Rear Right | View on Amazon |
| SACHS | 319238 | 🇺🇸 US 🇨🇦 CA | Rear Left | View on Amazon |
This table covers the shocks and struts that damp wheel motion. Typical signs include a nose that keeps bouncing, cupped tires, or fluid weeping down the body. Replace shocks or struts in axle pairs and renew the mounts if they are torn or collapsed.
5 Shock / Strut parts for the 2021 BMW M4 come from 2 brands — SACHS and BILSTEIN. The "Popular" part is SACHS 319242.
This group includes SACHS 319242, BILSTEIN 26320502 and BILSTEIN 26345901 and the remaining parts above.
Suspension Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BILSTEIN | 49309119 | 🇺🇸 US 🇨🇦 CA | EVO SE | View on Amazon |
This table covers the Suspension kits.
This group shows a single part: BILSTEIN 49309119.
Sway Bar Link
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 1018921 | 🇺🇸 US 🇨🇦 CA | Front LeftEND LINK | View on Amazon |
| BECK/ARNLEY | 1018922 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
This table covers the links that connect the anti-roll bar to each control arm or strut. Typical signs include a clunk on one wheel over a driveway, or a rattle that goes away when you lean on the bar. Replace links in pairs; a seized stud often takes the bushing with it.
2 Sway Bar Link parts for the 2021 BMW M4 come from BECK/ARNLEY.
Listed part numbers: BECK/ARNLEY 1018921 and BECK/ARNLEY 1018922.
Buying Suspension Parts for a 2021 BMW M4
On this vehicle, the suspension system controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links.
- 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 shocks and struts in axle pairs, renew the sway-bar links with the struts, and get an alignment after any control-arm or tie-rod work.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Control Arm and Shock / Strut .
Frequently Asked Questions
How many suspension parts fit the 2021 BMW M4?
Our catalog currently lists 20 suspension parts for the 2021 BMW M4 across 6 subcategories and 10 brands, covering the 3.0L L6 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of suspension problems on a 2021 BMW M4?
Common symptoms include clunks over speed bumps, wandering steering, cupped tire wear, or a nose that keeps bouncing after a dip. 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 shocks and struts in axle pairs, renew the sway-bar links with the struts, and get an alignment after any control-arm or tie-rod work.
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 worn bushings often mimic bad shocks — inspect before buying, and remember loaded vs unloaded strut assemblies differ in labor by hours. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 BMW M4
Suspension Parts for Other BMW M4 Years
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