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Audi B9 S4 Quattro 3.0T

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Audi B9 S4 Quattro 3.0T Suspension Parts & Accessories

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APR Strut Tower Brace (B9 Chassis)

ES#4899232 - SUS00027 - APR Strut Tower Brace (B9 Chassis) - Direct bolt-on strut brace engineered to enhance chassis rigidity, reduce flex, and improve handling for a more connected driving experience. - APR - Audi

Direct bolt-on strut brace engineered to enhance chassis rigidity, reduce flex, and improve handling for a more connected driving experience. Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
4899232
Mfg#:
SUS00027
In Stock
11% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$393.99

This product was last offered at the strikethrough price on
07-05-2026

$349.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW V3 Series Coilover Kit

ES#4056874 - 352100BJ - KW V3 Series Coilover Kit - The ultimate in coilover technology, featuring double adjustable damping - KW Suspension - Audi

The ultimate in coilover technology, featuring double adjustable damping affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For sedan models with Electronic Damping Control. Range of lowering is 0.4-1.4" front and rear.

Brand:
KW Suspension - Corporate Logo
ES#:
4056874
Mfg#:
352100BJ
Back Ordered
$3834.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW V3 Series Coilover Kit

ES#4056866 - 352100BH - KW V3 Series Coilover Kit - The ultimate in coilover technology, featuring double adjustable damping - KW Suspension - Audi

The ultimate in coilover technology, featuring double adjustable damping affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For sedan models without Electronic Damping Control and a 50mm front strut body. Range of lowering is 0.4-1.4" front and rear.

Brand:
KW Suspension - Corporate Logo
ES#:
4056866
Mfg#:
352100BH
Back Ordered
$3524.00 USD
Free Shipping

Rear Suspension Control Arm Refresh Kit

A complete Kit to give you everything you need to replace a your rear control arms! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4803796
Mfg#:
8W0505311HKT
Ships in 9 Business Days
$3243.99

This product was last offered at the strikethrough price on
07-05-2026

$3232.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Density Line Upper Control Arm Kit - Camber Correcting

ES#3546573 - 034-401-1061 - Density Line Upper Control Arm Kit - Camber Correcting - Adds positive camber to achieve factory alignment specs after lowering, and reduce tire wear! - 034Motorsport - Audi

Adds positive camber to achieve factory alignment specs after lowering, and reduce tire wear! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3546573
Mfg#:
034-401-1061
Back Ordered
ON SALE! SAVE 10%
$663.00

This product was last offered at the strikethrough price on
06-28-2026

$596.70 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B9 A4/A5/S4/S5 Quattro Adjustable Damping Coilovers & Front/Rear Sway Bars

ES#4876154 - 000745LAEBKT2 - B9 A4/A5/S4/S5 Quattro Adjustable Damping Coilovers & Front/Rear Sway Bars - Enhance your B9 with a performance-tuned coilover suspension setup & upgraded sway bars! - Enthusiast Bundles - Audi

Enhance your B9 with a performance-tuned coilover suspension setup & upgraded sway bars! Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4876154
Mfg#:
000745LAEBKT2
Ships on Nov 12, 2026
Auto Notify
ON SALE! SAVE 25%
$1863.98

This product was last offered at the strikethrough price on
05-05-2026

$1399.00 USD
This product is lifetime replacement eligible Lifetime Replacement

B8 Performance Plus Front Strut - Priced Each

ES#4390623 - 24-274876 - B8 Performance Plus Front Strut - Priced Each - Compliments factory sport package or lowering springs with a remarkably comfortable sport ride. World-famous Bilstein quality with a limited lifetime warranty! - Bilstein - Audi

Compliments factory sport package or lowering springs with a remarkably comfortable sport ride. World-famous Bilstein quality with a limited lifetime warranty! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bilstein - Corporate Logo
ES#:
4390623
Mfg#:
24-274876
In Stock at Vendor
33% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$370.00

This product was last offered at the strikethrough price on
07-05-2026

$249.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

BR Series Coilover Suspension Kit - Extreme Low

ES#4424821 - S-27E-BR - BR Series Coilover Suspension Kit - Extreme Low - Featuring 30 levels of adjustment and performance spring rates and valving - BC Racing - Audi

Featuring 30 levels of adjustment and performance spring rates and valving affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with production date up to 7/11/2016 with 53mm front strut body without factory Electronic Damping Control.

Brand:
BC Racing - Corporate Logo
ES#:
4424821
Mfg#:
S-27E-BR
Ships on Aug 25, 2026
$1345.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 Billet Tunnel Brace - Black

ES#3476922 - 023781ECS01-01 - Audi B9 Billet Tunnel Brace - Black - Replace your small and weak stamped brace with heavy-duty billet aluminum! - ECS - Audi

Replace your small and weak stamped brace with heavy-duty billet aluminum! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3476922
Mfg#:
023781ECS01-01
In Stock
ON SALE! SAVE 20%
$168.99

This product was last offered at the strikethrough price on
06-13-2026

$135.19 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

BR Series Coilover Suspension Kit - B9 Audi A4/S4

ES#4872510 - S-35-BR - BR Series Coilover Suspension Kit - B9 Audi A4/S4 - Featuring 30 levels of adjustment and performance spring rates and valving that makes the BR Series perfect for both daily drivers and track warriors! - BC Racing - Audi

Featuring 30 levels of adjustment and performance spring rates and valving that makes the BR Series perfect for both daily drivers and track warriors! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with production date up to 7/11/2016 with 53mm front strut body with factory Electronic Damping Control.

Brand:
BC Racing - Corporate Logo
ES#:
4872510
Mfg#:
S-35-BR
Ships on Aug 25, 2026
$1195.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear Cup Kit/Coilover Installation Kit

ES#3691725 - 8w0412377AKT1 - Front & Rear Cup Kit/Coilover Installation Kit - Includes front & rear shock/strut mounts and associated hardware for a complete suspension installation - Genuine Volkswagen Audi - Audi

Includes front & rear shock/strut mounts and associated hardware for a complete suspension installation affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For models with closed loop suspension (Audi Drive Select / Adaptive suspension - PR-Code 1BL)

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3691725
Mfg#:
8W0412377AKT1
Ships in 5 Business Days
$593.99

This product was last offered at the strikethrough price on
07-04-2026

$591.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

X-Clear Driveshaft Tunnel Brace

ES#4381928 - 034-603-0029 - X-Clear Driveshaft Tunnel Brace - Allows for a larger diameter exhaust to be installed without causing excessive rattling or vibration. - 034Motorsport - Audi

Allows for a larger diameter exhaust to be installed without causing excessive rattling or vibration. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4381928
Mfg#:
034-603-0029
In Stock
ON SALE! SAVE 10%
$151.00

This product was last offered at the strikethrough price on
06-28-2026

$135.90 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Lowering Springs

ES#4830683 - CTS-LS-025 - Lowering Springs - 1 lowering on average for front and Rear - CTS - Audi

1″ lowering on average for front and Rear affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
4830683
Mfg#:
CTS-LS-025
In Stock
$249.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Strut - Priced Each

ES#4022517 - 8W0413029N - Front Strut - Priced Each - For vehicles with EDC - Genuine Volkswagen Audi - Audi

For vehicles with EDC affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4022517
Mfg#:
8W0413029N
Ships in 4 Business Days
5% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$1079.99

This product was last offered at the strikethrough price on
07-05-2026

$1025.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

B4 OE Replacement Rear Shock - Priced Each

ES#4390628 - 24-279697 - B4 OE Replacement Rear Shock - Priced Each - Engineered to be the best choice for maintaining the original ride quality of your vehicle, while meeting or exceeding OE standards. - Bilstein - Audi

Engineered to be the best choice for maintaining the original ride quality of your vehicle, while meeting or exceeding OE standards. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

For vehicles with sport suspension and without electronic suspension

Brand:
Bilstein - Corporate Logo
ES#:
4390628
Mfg#:
24-279697
In Stock
$109.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

EMD Auto Lowering Spring Kit

ES#3218658 - EMD-B9Q-LS - EMD Auto Lowering Spring Kit - Approximately 1.6" Front & Rear drop - Emmanuele Design - Audi

Approximately 1.6" Front & Rear drop affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Emmanuele Design - Corporate Logo
ES#:
3218658
Mfg#:
EMD-B9Q-LS
Ships in 7 Business Days
3% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$290.00

This product was last offered at the strikethrough price on
07-05-2026

$280.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Suspension Parts & Accessories

A good suspension holds you up, while keeping your tires safely planted on the road surface for good traction, braking, and handling. Even if you don't know jounce from rebound, we can help you choose suspension parts, accessories, and upgrades to match your car, driving style, and budget.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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