2021 Audi S4 Suspension Parts

This table covers the ball joints that articulate each control arm at the knuckle. Read more

6 Ball Joint parts are listed for the 2021 Audi S4, from MEVOTECH, SUSPENSIA, DORMAN and 3 other brands. MEVOTECH MS10575 carries the "Popular" badge. All of them fit every engine offered in the 2021 S4.

The Daily Driver section lists 4 options from MEVOTECH, SUSPENSIA, DORMAN and 1 other brand — grouped for everyday commuting duty. MEVOTECH MS10575 is listed in this group.

In the Economy grade, BECK/ARNLEY and FVP supply 2 parts: the catalog's value-priced group. A representative part number is BECK/ARNLEY 1018400.

This group includes MEVOTECH MS10575, SUSPENSIA X01BJ0746 and DORMAN 538236 and the remaining parts above.

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

67 Control Arm parts are listed for the 2021 Audi S4, from MEVOTECH, DELPHI, DORMAN and 4 other brands. MOOG RK623949 carries the "Popular" badge. Grades run from Daily Driver through Economy; Daily Driver is the most populated section, led by MEVOTECH, DELPHI, DORMAN and 2 other brands.

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

9 Control Arm Bushing parts are listed for the 2021 Audi S4, from DELPHI, SUSPENSIA, DORMAN and 1 other brand. DELPHI TD838W carries the "Popular" badge. 4 parts fit every engine; the other 5 are engine-specific.

The Daily Driver section: 5 options from DELPHI and SUSPENSIA. DELPHI TD838W is listed in this group.

Economy: 2 parts, from DORMAN. A representative part number is DORMAN 533628.

2 ungrouped parts are not assigned to a grade, with the same engine-level match.

This group includes DELPHI TD838W, DELPHI TD1633W and DELPHI TD723W and the remaining parts above.

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

5 Ride Height Sensor parts are listed for the 2021 Audi S4, from MONROE and VEMO. VEMO V10720064 carries the "Popular" badge. All of them fit every engine offered in the 2021 S4.

Listed part numbers: VEMO V10720064, MONROE HS10017 and MONROE HS10018, plus the other parts above.

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

14 Shock / Strut parts are listed for the 2021 Audi S4, from BILSTEIN, PRT, KYB and 2 other brands. BILSTEIN 24262293 carries the "Popular" badge. 5 parts fit every engine; the other 9 are engine-specific.

Economy: 2 parts, from PRT. A representative part number is PRT 940110.

The Increased Handling/Stability section lists 7 options from BILSTEIN and KYB — grouped under the catalog's "Increased Handling/Stability" designation — the notes column spells out what sets them apart. BILSTEIN 24262293 is listed in this group.

In the Original Ride Quality grade, FCS, SACHS and KYB supply 5 parts: grouped under the catalog's "Original Ride Quality" designation — the notes column spells out what sets them apart. A representative part number is FCS 355171.

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

This group shows a single part: SACHS 803294.

This table covers the Suspension kits. Read more

One part is listed for the 2021 Audi S4 — BILSTEIN 49290868.

This table covers the bushings that clamp the anti-roll bar to the chassis. 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

5 Sway Bar Bushing parts are listed for the 2021 Audi S4, from DELPHI, MEVOTECH, SUSPENSIA and 1 other brand. DELPHI TD826W carries the "Popular" badge.

The Daily Driver section: 4 options from DELPHI, MEVOTECH and SUSPENSIA. DELPHI TD826W is listed in this group.

Economy: 1 part, from ÜRO PARTS. A representative part number is ÜRO PARTS 8K0411327B.

Part numbers include DELPHI TD826W, DELPHI TD5787W and MEVOTECH MS70894, among others listed 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

14 Sway Bar Link parts are listed for the 2021 Audi S4, from DELPHI, SUSPENSIA, MEVOTECH and 4 other brands. DELPHI TC2312 carries the "Popular" badge.

The Daily Driver section: 11 options from DELPHI, SUSPENSIA, DORMAN and 2 other brands. DELPHI TC2312 is listed in this group.

Economy: 3 parts, from BECK/ARNLEY, FVP and MEVOTECH. A representative part number is BECK/ARNLEY 1018480.