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Audi B9 A4 Quattro 2.0T Most Popular Parts

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ES#4147652 - 028802ecs01KT - Audi B9 A4/S4 Front Lip Spoiler - Gloss Black - Upgrade your exterior styling! - ECS - Audi

Upgrade your exterior styling! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

For S-Line models only. Fits up to 2019 model year with *pre-facelift* front bumpers

Brand:
ECS - Corporate Logo
ES#:
4147652
Mfg#:
028802ECS01KT
In Stock
ON SALE! SAVE 25%
$378.99

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

$284.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4745528 - 034-401-1074 - Density Line Control Arm Kit - Non-Adjustable - Drop in upgrade for upper and lower control arms - 034Motorsport - Audi

Drop in upgrade for upper and lower control arms affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4745528
Mfg#:
034-401-1074
In Stock
$1026.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3551351 - 06l121111hKT1 - Thermostat / Water Pump Replacement Kit - Includes necessary parts to replace the thermostat. Includes upgraded Bremmen Parts water pump/thermostat. - Assembled By ECS - Audi Volkswagen

Includes necessary parts to replace the thermostat. Includes upgraded Bremmen Parts water pump/thermostat. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
3551351
Mfg#:
06L121111HKT1
Ships in 9 Business Days
Auto Notify
ON SALE! SAVE 19%
$298.99

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

$243.53 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement
ES#4325181 - 628-13KT - 20" Style 628 Wheels - Set Of Four - 20x9 ET30 5x112 66.6CB - Matte Gunmetal/Machine Face - Alzor - Audi

20x9 ET30 5x112 66.6CB - Matte Gunmetal/Machine Face affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Alzor - Corporate Logo
ES#:
4325181
Mfg#:
628-13KT
In Stock
ON SALE! SAVE 32%
$1431.99

This product was last offered at the strikethrough price on
01-03-2026

$975.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3690264 - 021616ecs01KT - B9 T304 Stainless Steel 3.0" Downpipe - Let your engine breathe and growl with our front resonator delete! - ECS - Audi

Let your engine breathe and growl with our front resonator delete! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3690264
Mfg#:
021616ECS01KT
Ships on Aug 17, 2026
Auto Notify
ON SALE! SAVE 25%
$509.99

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

$382.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4265351 - 008480LA01 - Audi B9 A4 S-Line Pre-Facelift Rear Diffuser - Gloss Black - Add some aggressive styling to your Audi! - ECS - Audi

Add some aggressive styling to your Audi! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Fits pre-facelift, S-line models (up to 2018), without integrated tips in the rear valance

Brand:
ECS - Corporate Logo
ES#:
4265351
Mfg#:
008480LA01
In Stock
ON SALE! SAVE 20%
$430.99

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

$344.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4818763 - 06L121111P - Upgraded Heavy Duty Thermostat / Water Pump Belt Kit - Includes thermostat, water pump, belt, union, and O-rings. - Hamburg Tech - Audi Volkswagen Porsche

Includes thermostat, water pump, belt, union, and O-rings. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
4818763
Mfg#:
06L121111P
In Stock
$267.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2864616 - gfbt9351 - DV+ Performance Diverter Valve T9351 - Direct-fit performance solution for the OE diverter valve - Go Fast Bits - Audi Volkswagen Porsche

Direct-fit performance solution for the OE diverter valve affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CARB certified for sale in all 50 states

Brand:
Go Fast Bits - Corporate Logo
ES#:
2864616
Mfg#:
GFBT9351
EO#:
D-844
In Stock
10% off MSRP

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

$171.00

This product was last offered at the strikethrough price on
06-24-2026

$153.90 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4033282 - ms100192kt3KT - Performance Ignition Service Kit - Features APR Upgraded Ignition Coils and Brisk Silver Racing ER12s plugs, ensuring a stronger and more consistent spark! - Assembled By ECS - Audi Volkswagen

Features APR Upgraded Ignition Coils and Brisk Silver Racing ER12s plugs, ensuring a stronger and more consistent spark! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
CARB certified for sale in all 50 states

Brand:
Assembled By ECS - Corporate Logo
ES#:
4033282
Mfg#:
MS100192KT3KT
EO#:
D-783-5
In Stock
$264.25 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4759009 - EM100040 - APR Ultralink At-Home Tuning Cable - Tuning your vehicle with APR Software has never been easier thanks to the APR Ultralink! - APR - Audi Volkswagen Porsche

Tuning your vehicle with APR Software has never been easier thanks to the APR Ultralink! 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!
Only available for purchase in the United States and Canada.

Brand:
APR - Corporate Logo
ES#:
4759009
Mfg#:
EM100040
In Stock
$139.95 USD
Free Shipping
ES#4629901 - K7531 - Power Stop Z23 Evolution Sport Front & Rear Brake Kit (338mm/330mm) - A complete 4-wheel performance brake upgrade featuring drilled & slotted rotors and low-dust carbon-fiber ceramic pads. - Power Stop - Audi

A complete 4-wheel performance brake upgrade featuring drilled & slotted rotors and low-dust carbon-fiber ceramic pads. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Power Stop - Corporate Logo
ES#:
4629901
Mfg#:
K7531
Ships in 2 Business Days
$629.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4684889 - 034-103-3306 - Dynamic+ End User Flashing Kit R4 (Flashing Device Only - Tuning Not Included) - End User Flashing allows Dynamic+ Performance Software customers to receive and install software updates and revisions, flash back to stock, or upgrade to the next stage of performance software for their vehicle. - 034Motorsport - Audi Volkswagen

End User Flashing allows Dynamic+ Performance Software customers to receive and install software updates and revisions, flash back to stock, or upgrade to the next stage of performance software for their vehicle. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
The 034SPI Mobile App is only available on vehicles with Dynamic+ Tuning installed. You must purchase Dynamic+ Tuning for your Audi or Volkswagen to access the Dynamic+ Flashing Suite and 034SPI Mobile Application.

Brand:
034Motorsport - Corporate Logo
ES#:
4684889
Mfg#:
034-103-3306
EO#:
D-850
In Stock
$180.00 USD
Free Shipping
ES#3691929 - 06h905110lkt3 - RS Ignition Service Kit  - Add 8V RS3/B9 S4 spark with these red top coil packs and RS7 spark plugs for the ultimate ignition service kit for your 1.8T/2.0T Gen3 engine! - Assembled By ECS - Audi Volkswagen

Add 8V RS3/B9 S4 spark with these red top coil packs and RS7 spark plugs for the ultimate ignition service kit for your 1.8T/2.0T Gen3 engine! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
1 heat range colder than OE plug

Brand:
Assembled By ECS - Corporate Logo
ES#:
3691929
Mfg#:
06H905110LKT3
In Stock
ON SALE!
$242.20

This product was last offered at the strikethrough price on
04-27-2026

$235.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3176060 - 034-509-4053 - Billet Aluminum Transmission Mount Insert - This billet aluminum insert is designed to fill the large void in the factory transmission mount - 034Motorsport - Audi

This billet aluminum insert is designed to fill the large void in the factory transmission mount affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3176060
Mfg#:
034-509-4053
In Stock
$91.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4619953 - 034-509-5041 - Street Density Line Motor Mount Kit - 60 Durometer - Void-free and fluid-free, eliminating the slop associated with the factory mounts - 034Motorsport - Audi

Void-free and fluid-free, eliminating the slop associated with the factory mounts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4619953
Mfg#:
034-509-5041
In Stock
$480.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4164383 - MS100204-4KT - APR Upgraded Ignition Coils - Blue - Set Of Four - Designed to be a direct plug-and-play upgrade to factory coils, providing greater energy output, ensuring a stronger and more consistent spark! - APR - Audi Volkswagen

Designed to be a direct plug-and-play upgrade to factory coils, providing greater energy output, ensuring a stronger and more consistent spark! 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!
CARB certified for sale in all 50 states

Brand:
APR - Corporate Logo
ES#:
4164383
Mfg#:
MS100204-4KT
EO#:
D-783-5
In Stock
$211.80 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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