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Audi B5 A4 Quattro 1.8T

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Audi B5 A4 Quattro 1.8T Most Popular Parts

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Unitronic 3" Air Filter (Gen 1)

ES#4362289 - UH003-IN4 - Unitronic 3" Air Filter (Gen 1) - Unitronic - Audi Volkswagen

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Unitronic - Corporate Logo
ES#:
4362289
Mfg#:
UH003-IN4
Ships on Jul 24, 2026
Auto Notify
$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Ratcheting Serpentine Belt Wrench Kit

ES#3673919 - B8800077 - Ratcheting Serpentine Belt Wrench Kit - Used to retract your serpentine belt tensioner - includes 18mm, 5/8 in, 14mm, 13mm, 12mm, sockets and 3/8 in and 1/4 in drive adapters - Bav Auto Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche
ECS Tuning recommends this product.

Used to retract your serpentine belt tensioner - includes 18mm, 5/8 in, 14mm, 13mm, 12mm, sockets and 3/8 in and 1/4 in drive adapters affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bav Auto Tools - Corporate Logo
ES#:
3673919
Mfg#:
B8800077
In Stock
ON SALE! SAVE 10%
$67.99

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

$61.19 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Ball Seat Wheel Nuts - Set Of 20

ES#4505694 - 034-604-1004-20 - Ball Seat Wheel Nuts - Set Of 20 - Made from high tensile heat treated Grade 10.9 Chromoly Steel and coated in Black Zinc. M14x1.5 - 034Motorsport - Audi Volkswagen

Made from high tensile heat treated Grade 10.9 Chromoly Steel and coated in Black Zinc. M14x1.5 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4505694
Mfg#:
034-604-1004-20
In Stock
$97.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

BC Racing Rear Damping Adjustment Extenders - BR Type

ES#3524875 - DMP-EXT - BC Racing Rear Damping Adjustment Extenders - BR Type - Allow you to make damping adjustments without removing the rear interior - BC Racing - Audi BMW Volkswagen MINI

Allow you to make damping adjustments without removing the rear interior affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
BC Racing - Corporate Logo
ES#:
3524875
Mfg#:
DMP-EXT
Ships in 1-3 days
$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

White LED Festoon Bulb 36mm - Priced Each

ES#2515359 - PL36MM65050WHT - White LED Festoon Bulb 36mm - Priced Each - 6 Chip White LED Festoon Bulb - ZiZa - Audi BMW Volkswagen Mercedes Benz MINI Porsche

6 Chip White LED Festoon Bulb affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ZiZa - Corporate Logo
ES#:
2515359
Mfg#:
PL36MM65050WHT
In Stock
ON SALE! SAVE 10%
$15.99

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

$14.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Boost Cooler Stage 2 Progressive Water/Methanol Injection Kit

ES#4350144 - 20010-BRD - Boost Cooler Stage 2 Progressive Water/Methanol Injection Kit - Engine mounted, stainless steel braided line, 4AN fittings - SnowPerformance - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Engine mounted, stainless steel braided line, 4AN fittings affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
SnowPerformance - Corporate Logo
ES#:
4350144
Mfg#:
20010-BRD
In Stock at Vendor
$625.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Adjustable Fan Controller Kit

ES#2816698 - MMFANCNTLUPROBE - Adjustable Fan Controller Kit - Fine-tune your cooling system - Mishimoto - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Fine-tune your cooling system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mishimoto - Corporate Logo
ES#:
2816698
Mfg#:
MMFANCNTLUPROBE
In Stock
9% off MSRP

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

$98.00

This product was last offered at the strikethrough price on
06-21-2026

$88.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pro-Line Diesel Intake System Cleaner - 400mL

ES#3514639 - 20208KT - Pro-Line Diesel Intake System Cleaner - 400mL - Clean your intake duct without removing it - Liqui-Moly - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Clean your intake duct without removing it affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat! Ground ship only in the contiguous U.S.

Brand:
Liqui-Moly - Corporate Logo
ES#:
3514639
Mfg#:
20208KT
In Stock
$16.25 USD
Free Shipping
on orders $49 and up

55mm Bullet Nose Stud & Nut Bundle - Ball Seat - Set Of 20

ES#4505732 - 034-604-6003-20 - 55mm Bullet Nose Stud & Nut Bundle - Ball Seat - Set Of 20 - Made from high tensile heat treated Grade 10.9 Chromoly Steel and coated in Black Zinc. M14x1.5 - 034Motorsport - Audi Volkswagen

Made from high tensile heat treated Grade 10.9 Chromoly Steel and coated in Black Zinc. M14x1.5 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For use with spacers up to 10mm only

Brand:
034Motorsport - Corporate Logo
ES#:
4505732
Mfg#:
034-604-6003-20
In Stock
$195.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

-10AN ORB X 3/4" Hose Barb Fitting Assembly - Priced Each

ES#3187875 - 003779ECS10 - -10AN ORB X 3/4" Hose Barb Fitting Assembly - Priced Each - Universal fitting for ECS Tuning Catch can to use a 3/4" Hose - ECS - Audi BMW Volkswagen MINI

Universal fitting for ECS Tuning Catch can to use a 3/4" Hose affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3187875
Mfg#:
003779ECS10
In Stock
ON SALE! SAVE 25%
$39.99

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

$29.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Tuning Baffled Oil Catch Can - 6oz

ES#4369811 - 003779ECS05-01 - ECS Tuning Baffled Oil Catch Can - 6oz - Capture harmful oil vapors and keep your intake tract clean. Now featuring an easy to empty drain plug! - ECS - Audi BMW Volkswagen MINI

Capture harmful oil vapors and keep your intake tract clean. Now featuring an easy to empty drain plug! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For use with custom plumbing and ECS universal mounting bracket kit

Brand:
ECS - Corporate Logo
ES#:
4369811
Mfg#:
003779ECS05-01
In Stock
ON SALE! SAVE 46%
$233.99

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

$126.78 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Extra Long and Deep Protecta Wheel Nut Socket Set

ES#2986421 - 016136SCH01A - Extra Long and Deep Protecta Wheel Nut Socket Set - Extra long and deep protecta sockets are great for extended stud conversions or reaching deep set wheel nuts. - Schwaben - Audi BMW Volkswagen Mercedes Benz MINI Porsche
ECS Tuning recommends this product.

Extra long and deep protecta sockets are great for extended stud conversions or reaching deep set wheel nuts. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Schwaben - Corporate Logo
ES#:
2986421
Mfg#:
016136SCH01A
In Stock
ON SALE! SAVE 25%
$78.99

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

$59.24 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

300V 5w40 "Competition" - 2 Liters

ES#4658242 - 110817 - 300V 5w40 "Competition" - 2 Liters - 100% Synthetic - Ester Technology - Motul - Audi BMW Volkswagen MINI

100% Synthetic - Ester Technology affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Motul - Corporate Logo
ES#:
4658242
Mfg#:
110817
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.

$60.83

This product was last offered at the strikethrough price on
06-21-2026

$54.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi R8 Expansion Tank Cap

ES#4691207 - 420121321 - Audi R8 Expansion Tank Cap - Keep proper pressure on your coolant, replaces any modern blue or black cooling cap - Bremmen Parts - Audi Volkswagen Porsche

Keep proper pressure on your coolant, replaces any modern blue or black cooling cap affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4691207
Mfg#:
420121321
In Stock
ON SALE! SAVE 14%
$34.99

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

$29.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Air Filter, Conical, 0.75" Inlet

ES#4858334 - 034-108-B018 - Performance Air Filter, Conical, 0.75" Inlet - Perfect fit performance Air Filter for SAI equipped cars, breathers, and more! - 034Motorsport - Audi Volkswagen

Perfect fit performance Air Filter for SAI equipped cars, breathers, and more! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4858334
Mfg#:
034-108-B018
In Stock
$31.00 USD
Free Shipping

Magnaflow Universal Muffler

ES#1928333 - 14211 - Magnaflow Universal Muffler - Polished Stainless - Magnaflow - Audi BMW Volkswagen MINI Porsche

Polished Stainless affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Magnaflow - Corporate Logo
ES#:
1928333
Mfg#:
14211
In Stock
$174.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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Manufacturer names and/or part numbers are used only for identification purposes.

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