The 2021 BMW 420I has 9 suspension parts with verified fitment on this page — 5 part types and 6 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2021 BMW 420I, the suspension system controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links. 7 parts of the 9 listed are Sway Bar Link (4 parts), Ride Height Sensor (2 parts) and Control Arm (1 part). The other 2 part types cover the remaining 2 parts.
Every part on this page is matched to the 2.0L L4 Turbocharged — the only engine offered in the 2021 BMW 420I.
The most listed brands for 2021 BMW 420I suspension parts are DORMAN (3 parts), FVP (2 parts) and ARNOTT (1 part), plus 3 more brands. Quality grades include Daily Driver and Economy.
Each part number listed for the 2021 BMW 420I opens a page with every vehicle that part fits.
Control Arm
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 527124 | 🇲🇽 MX | Rear Lower Rearward | 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.
This group shows a single part: DORMAN 527124.
Ride Height Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARNOTT | RH3718 | 🇲🇽 MX | Fits Rear | View on Amazon |
| MONROE | HS10203 | 🇲🇽 MX | 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.
2 Ride Height Sensor parts for the 2021 BMW 420I come from 2 brands — ARNOTT and MONROE.
This group includes ARNOTT RH3718 and MONROE HS10203.
Shock / Strut Mount Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING | B28110 | 🇲🇽 MX | Cap Seal | View on Amazon |
This table covers the gaskets that seal the Shock / Strut Mount. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
This group shows a single part: ELRING B28110.
Shock Dust Cover
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MARELLI | KPR072 | 🇲🇽 MX | Rear | View on Amazon |
This table covers the Shock Dust covers.
This group shows a single part: MARELLI KPR072.
Sway Bar Link
Daily Driver
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 541820 | 🇲🇽 MX | Rear Right | View on Amazon |
| DORMAN | 541819 | 🇲🇽 MX | Rear Left | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | SL14501 | 🇲🇽 MX | Rear Left | View on Amazon |
| FVP | SL14502 | 🇲🇽 MX | Rear 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.
4 Sway Bar Link parts for the 2021 BMW 420I come from 2 brands — DORMAN and FVP.
In the Daily Driver grade, DORMAN supplies 2 parts: grouped for everyday commuting duty. A representative part number is DORMAN 541820.
The Economy section lists 2 options from FVP — the catalog's value-priced group. FVP SL14501 is listed in this group.
Listed part numbers: DORMAN 541820, DORMAN 541819 and FVP SL14501, plus the other parts above.
Buying Suspension Parts for a 2021 BMW 420I
On this vehicle, the suspension system controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links.
- Confirm you have the 2.0L L4 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: Sway Bar Link and Ride Height Sensor .
Frequently Asked Questions
How many suspension parts fit the 2021 BMW 420I?
Our catalog currently lists 9 suspension parts for the 2021 BMW 420I across 5 subcategories and 6 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of suspension problems on a 2021 BMW 420I?
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 420I 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 420I?
Every part on this page is matched to the 2.0L L4 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 420I
Suspension Parts for Other BMW 420I 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.