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Audi B9 S4 Quattro 3.0T

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Audi B9 S4 Quattro 3.0T Most Popular Parts

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Billet Aluminum Rear Differential Mount Insert Kit

ES#3509529 - 034-505-2020 - Billet Aluminum Rear Differential Mount Insert Kit - Limits movement of factory rear diff mounts, increasing drivetrain rigidity and response! - 034Motorsport - Audi

Limits movement of factory rear diff mounts, increasing drivetrain rigidity and response! 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
3509529
Mfg#:
034-505-2020
In Stock
ON SALE! SAVE 15%
$154.00

This product was last offered at the strikethrough price on
08-17-2026

$131.67 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Ball Seat Wheel Bolt - 14x1.5x40mm - Priced Each

ES#3560828 - S17D40R13 - Ball Seat Wheel Bolt - 14x1.5x40mm - Priced Each - Zinc-coated wheel bolts made specifically for OE wheels - ECS - Audi Volkswagen

Zinc-coated wheel bolts made specifically for OE wheels 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3560828
Mfg#:
S17D40R13
Back Ordered
Auto Notify
ON SALE! SAVE 25%
$15.99

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

$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

IE 4 BAR MAP Sensors

ES#4920867 - IEELVZ1 - IE 4 BAR MAP Sensors - A direct drop-in replacement when combined with the proper software. - Integrated Engineering - Audi

A direct drop-in replacement when combined with the proper software.

Brand:
Integrated Engineering - Corporate Logo
ES#:
4920867
Mfg#:
IEELVZ1
In Stock
$234.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear 2-Piece Scalloped Brake Rotor Kit - No Pads

ES#4056678 - 023940ecs02ktKT - Front & Rear 2-Piece Scalloped Brake Rotor Kit - No Pads - Direct bolt-on upgrade to Tru-Float scalloped style rotors. Up to 20% less weight! - ECS - Audi

Direct bolt-on upgrade to Tru-Float scalloped style rotors. Up to 20% less weight! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4056678
Mfg#:
023940ECS02KTKT
In Stock
ON SALE! SAVE 28%
$2139.99

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

$1549.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

19" Style M205 - Set Of Four

ES#4316107 - m205-2KT - 19" Style M205 - Set Of Four - 19"x8.5" ET35 66.6CB 5x112 - Matte Graphite - Alzor - Audi BMW MINI

19"x8.5" ET35 66.6CB 5x112 - Matte Graphite 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Alzor - Corporate Logo
ES#:
4316107
Mfg#:
M205-2KT
In Stock
ON SALE! SAVE 50%
$1300.00

This product was last offered at the strikethrough price on
05-02-2026

$649.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear 2-Piece Brake Rotor Upgrade Kit

ES#4056683 - 023938ecs02KT - Front & Rear 2-Piece Brake Rotor Upgrade Kit - Direct bolt-on replacement - up to 16% less weight! - ECS - Audi

Direct bolt-on replacement - up to 16% less weight! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4056683
Mfg#:
023938ECS02KT
In Stock
ON SALE! SAVE 15%
$1783.99

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

$1516.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Temperature Sensor - 2 Pin

ES#3561442 - 079919523J - Coolant Temperature Sensor - 2 Pin - Monitors coolant temperature for fan control & gauge readings - Genuine Volkswagen Audi - Audi Volkswagen

Monitors coolant temperature for fan control & gauge readings

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3561442
Mfg#:
079919523J
In Stock
6% off MSRP

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

$53.32

This product was last offered at the strikethrough price on
08-23-2026

$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 20mm With Ball Seat Bolts

ES#2177173 - 6-ECS-024 - Wheel Spacer & Bolt Kit - 20mm With Ball Seat Bolts - Add some style to your Audi with these wheel spacers - ECS - Audi

Add some style to your Audi with these wheel spacers 10X Entries Into Our F80 M3 Sweepstakes
Fits OEM wheels, or wheels that use OEM ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2177173
Mfg#:
6-ECS-024
In Stock
ON SALE! SAVE 10%
$179.99

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

$161.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Brake Rotor Set Screw - Priced Each

ES#2634 - N10648301 - Brake Rotor Set Screw - Priced Each - Holds brake rotor to hub when wheel is removed (M6x16) - Genuine Volkswagen Audi - Audi Volkswagen

Holds brake rotor to hub when wheel is removed (M6x16)

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2634
Mfg#:
N10648301
In Stock
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Service Kit

ES#4620204 - G055515A2KT - Rear Differential Service Kit - Complete kit with Genuine fluids and magnetic drain plugs to service your rear differential. - Assembled By ECS - Audi

Complete kit with Genuine fluids and magnetic drain plugs to service your rear differential. 10X Entries Into Our F80 M3 Sweepstakes
For vehicles with sport diff

Brand:
Assembled By ECS - Corporate Logo
ES#:
4620204
Mfg#:
G055515A2KT
Ships on Sep 15, 2026
Auto Notify
ON SALE!
$227.99

This product was last offered at the strikethrough price on
05-02-2026

$211.28 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Spark Plug - Priced Each

ES#4768524 - 06M905606F - Spark Plug - Priced Each - Keep your engine running strong - NGK - Audi

Keep your engine running strong We Price Match - Give Us A Call or Chat!

Brand:
NGK - Corporate Logo
ES#:
4768524
Mfg#:
06M905606F
In Stock
$23.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

1-Piece Front Brake Rotor Upgrade Kit - Pair (350mm X 34mm)

ES#5446386 - 034-301-1024 - 1-Piece Front Brake Rotor Upgrade Kit - Pair (350mm X 34mm) - Geomet Anti-Corrosion Coating, CM-250 Special Alloy Designed Specifically To Reduce Warping from Hard Street Use - 034Motorsport - Audi

Geomet Anti-Corrosion Coating, CM-250 Special Alloy Designed Specifically To Reduce Warping from Hard Street Use 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
5446386
Mfg#:
034-301-1024
Ships in 2 Business Days
ON SALE! SAVE 14%
$397.00

This product was last offered at the strikethrough price on
08-17-2026

$339.44 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Bosch Ignition Service Kit

ES#4475329 - 06M905606F7KT - Bosch Ignition Service Kit - Includes six Bosch coil packs and OEM spark plugs to service your ignition system - Assembled By ECS - Audi

Includes six Bosch coil packs and OEM spark plugs to service your ignition system 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
4475329
Mfg#:
06M905606F7KT
In Stock
$367.43 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Billet Aluminum Front Strut Brace

ES#3199709 - 034-603-0012 - Billet Aluminum Front Strut Brace - Bolt-on upgrade for factory strut brace - Engineered to enhance handling dynamics and performance! - 034Motorsport - Audi

Bolt-on upgrade for factory strut brace - Engineered to enhance handling dynamics and performance! 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
3199709
Mfg#:
034-603-0012
Ships in 2 Business Days
ON SALE! SAVE 14%
$515.00

This product was last offered at the strikethrough price on
08-17-2026

$440.33 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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