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Audi S4 Most Popular Parts

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Cabin Filter / Fresh Air Filter

ES#3676780 - 8E0819439 - Cabin Filter / Fresh Air Filter - Filter the air coming into your vehicle - Hengst - Audi
ECS Tuning recommends this product.

Filter the air coming into your vehicle 5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat! Hengst is our preferred OEM filtration supplier!

Brand:
Hengst - Corporate Logo
ES#:
3676780
Mfg#:
8E0819439
In Stock
$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Motorsport Adjustable Rear Toe Links

ES#4669425 - 034-407-1009 - Motorsport Adjustable Rear Toe Links - A direct, drop-in upgrade for the cast steel factory rear toe links - 034Motorsport - Audi

A direct, drop-in upgrade for the cast steel factory rear toe links 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4669425
Mfg#:
034-407-1009
Ships in 2 Business Days
$463.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wiring Harness - Front Bumper

ES#441335 - 8E0971095T - Wiring Harness - Front Bumper - For car with parking aid - Genuine Volkswagen Audi - Audi

For car with parking aid Fits standard bumpers only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
441335
Mfg#:
8E0971095T
Ships in 1-2 days
10% off MSRP

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

$512.99

This product was last offered at the strikethrough price on
08-31-2026

$462.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Secondary Air Injection Pump

ES#4159245 - 079959231L - Secondary Air Injection Pump - Keep your engine running efficiently - Pierburg - Audi

Keep your engine running efficiently Up to the 2012 model year

Brand:
Pierburg - Corporate Logo
ES#:
4159245
Mfg#:
079959231L
Ships in 1-2 days
$729.99

This product was last offered at the strikethrough price on
07-28-2026

$462.98 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Lower Eccentric Bolt Hardware Kit - Priced Each

ES#3176225 - WHT001679KT2 - Rear Lower Eccentric Bolt Hardware Kit - Priced Each - Great kit for those needing to replace those rusty and stubborn eccentric bolts - Assembled By ECS - Audi

Great kit for those needing to replace those rusty and stubborn eccentric bolts 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
3176225
Mfg#:
WHT001679KT2
In Stock
$29.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Sway Bar End Link Kit

ES#4474176 - 8D0505465KT1 - Rear Sway Bar End Link Kit - Includes both end links with securing hardware - Assembled By ECS - Audi

Includes both end links with securing hardware 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
4474176
Mfg#:
8D0505465KT1
Ships on Jan 29, 2027
$85.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Denso Spark Plugs - Priced Each

ES#4111 - 5304 - Denso Spark Plugs - Priced Each - Stock #5304, Plug #IK20, Iridium plugs - Denso - Audi Volkswagen

Stock #5304, Plug #IK20, Iridium plugs

Brand:
Denso - Corporate Logo
ES#:
4111
Mfg#:
5304
In Stock
$8.25 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Toe Link - Left

ES#3087072 - 8W0501529D - Rear Toe Link - Left - Make your driving experience more comfortable and safer - Genuine Volkswagen Audi - Audi

Make your driving experience more comfortable and safer

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3087072
Mfg#:
8W0501529D
Ships in 1-2 days
13% off MSRP

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

$176.99

This product was last offered at the strikethrough price on
10-26-2026

$153.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

fuel injector Wiring Harness Conduit - priced each

ES#399412 - 4Z7971824C - fuel injector Wiring Harness Conduit - priced each - Shields the wiring for the fuel injectors - Genuine Volkswagen Audi - Audi

Shields the wiring for the fuel injectors

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
399412
Mfg#:
4Z7971824C
Ships in 1-2 days
11% off MSRP

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

$46.99

This product was last offered at the strikethrough price on
10-26-2026

$41.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Serpentine Belt

ES#4699371 - 06M903137T - Serpentine Belt - Replace your worn belt today before it breaks - Bando - Audi

Replace your worn belt today before it breaks

Brand:
Bando - Corporate Logo
ES#:
4699371
Mfg#:
06M903137T
Back Ordered
$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Ambient Air Temperature Probe

ES#4872096 - 8Z0820535B - Ambient Air Temperature Probe - Measures the outside air temperature - URO - Audi Volkswagen

Measures the outside air temperature 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
From production date 5/31/2011

Brand:
URO - Corporate Logo
ES#:
4872096
Mfg#:
8Z0820535B
In Stock
$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Clutch Kit

ES#2535476 - 078198141KT - Clutch Kit - Revive the response & feel of your transmission - Assembled By ECS - Audi Volkswagen

Revive the response & feel of your transmission 10X Entries Into Our F80 M3 Sweepstakes USE CODE KIT15 IN CART FOR BEST PRICE

Brand:
Assembled By ECS - Corporate Logo
ES#:
2535476
Mfg#:
078198141KT
Ships in 3 Business Days
$485.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Carbon Fiber Engine Cover

ES#4265528 - 034-1ZZ-1004 - Carbon Fiber Engine Cover - Designed to tastefully complement the factory engine bay with a beautiful carbon fiber weave that is perfectly matched to the X34 Carbon Fiber Air Intake. - 034Motorsport - Audi

Designed to tastefully complement the factory engine bay with a beautiful carbon fiber weave that is perfectly matched to the X34 Carbon Fiber Air Intake. 2X Entries Into Our F80 M3 Sweepstakes
For vehicles up through the 2019 model year only

Brand:
034Motorsport - Corporate Logo
ES#:
4265528
Mfg#:
034-1ZZ-1004
Ships in 2 Business Days
$461.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

034 Fuel Rail Pair With Brackets

ES#4029654 - 034-106-7016S4 - 034 Fuel Rail Pair With Brackets - Includes reversible brackets which allow the use of either short or tall bodied injectors, fits all 2.7T and RS4 intake manifolds. - 034Motorsport - Audi

Includes reversible brackets which allow the use of either short or tall bodied injectors, fits all 2.7T and RS4 intake manifolds. 2X Entries Into Our F80 M3 Sweepstakes
Please specify intake manifold prior to ordering.

Brand:
034Motorsport - Corporate Logo
ES#:
4029654
Mfg#:
034-106-7016S4
Ships in 2 Business Days
$230.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Polyurethane Snub Mount

ES#4023536 - 034-509-2010 - Polyurethane Snub Mount - This performance polyurethane snub mount fits most Audi vehicles manufactured through 2001, and is designed to increase stabilization of the motor under acceleration. - 034Motorsport - Audi

This performance polyurethane snub mount fits most Audi vehicles manufactured through 2001, and is designed to increase stabilization of the motor under acceleration. 2X Entries Into Our F80 M3 Sweepstakes
Does not fit C5 S6/RS6, C5 A6 4.2L, V8 Quattro, and A8 models.

Brand:
034Motorsport - Corporate Logo
ES#:
4023536
Mfg#:
034-509-2010
Ships in 2 Business Days
$46.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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