2021 BMW M340I Suspension Parts

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. Read more

24 Control Arm parts for the 2021 BMW M340I come from 5 brands — SUSPENSIA, MEVOTECH, DELPHI and 2 other brands. The "Popular" part is DORMAN 527124.

In the Daily Driver grade, SUSPENSIA, DELPHI, MEVOTECH and 1 other brand supply 20 parts: grouped for everyday commuting duty. A representative part number is DORMAN 527124.

The Economy section lists 4 options from BECK/ARNLEY and MEVOTECH — the catalog's value-priced group. BECK/ARNLEY 1028375 is listed in this group.

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. Read more

2 Control Arm Bushing parts for the 2021 BMW M340I come from LEMFÖRDER.

This group includes LEMFÖRDER 4506901 and LEMFÖRDER 4507201.

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. Read more

3 Ride Height Sensor parts for the 2021 BMW M340I come from 3 brands — ARNOTT, FCS and MONROE.

Listed part numbers: ARNOTT RH3718, FCS HS008 and MONROE HS10203.

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. Read more

8 Shock / Strut parts for the 2021 BMW M340I come from 2 brands — BILSTEIN and SACHS. The "Popular" part is BILSTEIN 20303334.

In the Increased Handling/Stability grade, BILSTEIN supplies 5 parts: grouped under the catalog's "Increased Handling/Stability" designation — the notes column spells out what sets them apart. A representative part number is BILSTEIN 22303295.

The Original Ride Quality section lists 3 options from BILSTEIN and SACHS — grouped under the catalog's "Original Ride Quality" designation — the notes column spells out what sets them apart. BILSTEIN 20303334 is listed in this group.

Part numbers include BILSTEIN 20303334, BILSTEIN 22303295 and BILSTEIN 20303426, among others listed above.

This table covers the upper mounts (and bearings) a strut bolts through at the tower. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

2 Shock / Strut Mount parts are listed for the 2021 BMW M340I, from SACHS and REIN.

The Daily Driver section: 1 option from SACHS. SACHS 803449 is listed in this group.

Economy: 1 part, from REIN. A representative part number is REIN AVQ0770.

Part numbers include SACHS 803449 and REIN AVQ0770.

This table covers the Suspension kits. Read more

8 Suspension Kit parts for the 2021 BMW M340I come from BILSTEIN. The "Popular" part is BILSTEIN 47300118.

In the Adjustable Performance grade, BILSTEIN supplies 5 parts: grouped under the catalog's "Adjustable Performance" designation — the notes column spells out what sets them apart. A representative part number is BILSTEIN 48300162.

Increased Handling/Stability: 3 parts, from BILSTEIN. A representative part number is BILSTEIN 47300118.

This group includes BILSTEIN 47300118, BILSTEIN 48300162 and BILSTEIN 48313063 and the remaining parts above.

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. Read more

25 Sway Bar Link parts for the 2021 BMW M340I come from 8 brands — MEVOTECH, DORMAN, BECK/ARNLEY and 5 other brands. The "Popular" part is MEVOTECH MS108186.

Daily Driver: 17 parts, from MEVOTECH, DORMAN, SUSPENSIA and 3 other brands. A representative part number is MEVOTECH MS108186.

The Economy section: 8 options from BECK/ARNLEY, FVP and MEVOTECH. FVP SL14501 is listed in this group.