QUATTRO MEETS PRACTICALITY
B5 through B9 — Audi's compact sedan with available Quattro AWD and turbo power.
Audi A4 HERITAGE
THE QUATTRO COMPACT
MOTORMIA A4 builds span B5 1.8T stage-3 tuners, B7 RS4 V8 swap projects, B8/B9 ECU-tuned dailies, and the S4 supercharged V6 generation. Many parts cross-fit with VW MK6/MK7 platforms.
Audi A4 ON MOTORMIA
THE NUMBERS
CATEGORIES
Top product categories for the Audi A4
BRANDS
Top brands for Audi A4 builds
READY TO BUILD YOUR AUDI A4?
Pick your year and trim to shop verified-fit Audi A4 parts.
Shop all Audi A4 parts →Verified Fitment
Audi A4 Category engines and components Parts
763 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

JE Pistons
JE Pistons VW 1.8T 20V 20MM PIN 82.5MM 9.25 FSR Piston Kit (Set of 4)

King Engine Bearings
King Engine Bearings Volkswagen 2.0L FSI/TFSI Performance Rod Bearing Set - Size STD

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L Turbo 82mm .051in MLS Head Gasket

JE Pistons
JE Pistons AUDI 1.8T 9.25:1 KIT Set of 4 Pistons

King Engine Bearings
King Engine Bearings AUDI AAH, BUG, CCWA,CTBA Thrust Washer Set

JE Pistons
JE Pistons VW 1.8T 20V KIT 81.5 Set of 4 Pistons

JE Pistons
JE Pistons 2013+ VW/Audi 2.0T TSI (22mm Pin) 82.5mm Bore 10.0:1 CR -4.5cc Dish FSR Piston - Single

Mahle
Mahle MS Piston Set VW TFSi 2.0L 83.50mm Bore 92.8mm Stroke 144mm Rod 20mm Pin -11cc 9.3 CR Set of 4

Wiseco
Wiseco Volkswagen 1.8T 8V Dished -7cc 81.5 Piston Shelf Stock Kit

JE Pistons
JE Pistons VW 1.8T 20V (20mm Pin) 81.5mm Bore FSR Piston Kit (Set of 4)

JE Pistons
Volkswagen 2.0L Turbo, 82.50 Bore, Flat, Set of 4

King Engine Bearings
King Volkswagen 1781cc Turbo & 1984cc Connecting Rod Bearing Set (Size STDX) (Set of 4)

JE Pistons
JE Pistons VW 2.0T FSI Ultra Series 20mm PIN - Set of 4 Pistons

Go Fast Bits
GFB 06-08 Volkswagen/Audi 2.0T Super Lightweight Non-Underdrive Crank Pulley Suits
JE Pistons
JE Pistons VW 1.8T 20V KIT 82.5 Set of 4 Pistons

ACL
ACL 70-83 VW 4 2000-On Coated Rod Bearing Set (No Notch)

ACL
ACL VW 4 1970-1983cc 2000 on Engine Connecting Rod Bearing Set

ACL
ACL VW 4 1780-1983cc 1983-on Engine Connecting Rod Bearing Set

ACL
ACL VW 4 1780-1983cc 1983-on Engine Connecting Rod Bearing Set

ACL
ACL VW 4 1780-1983cc 1983-on Engine Connecting Rod Bearing Set

ACL
ACL VW 4 1780-1983cc 1983-on Engine Connecting Rod Bearing Set

ACL
ACL VW/Audi 1781cc/1984cc Std Size High Perf w/ Extra Oil Clearance Rod Bearing Set - CT-1 Coated

ACL
ACL VW/Audi 1781cc/1984cc Std Size High Perf w/ Extra Oil Clearance Main Bearing Set - CT-1 Coated

ACL
ACL Volkswagen 2.0L TSI/TFSI EA888 Standard Size High Performance Main Bearing Set

ACL
ACL VW/Audi 1781cc/1984cc Standard Size High Performance Main Bearing Set

ACL
ACL Audi TFSI 1984cc 4 cyl. (CDL) S3, TTS .25mm Oversized High Performance Rod Bearing Set

ACL
ACL VW/Audi 1781cc/1984cc Standard Size High Performance Main Bearing Set - CT-1 Coated

ACL
ACL VW 2.0L TSI/TFSI EA888 4cyl 0.25 Oversized High Performance Main Bearing Set

ACL
ACL VAG 1.4i/1.6i/1.8t/2.0TFSI .25mm Oversized Performance Rod Bearing Set

ACL
ACL VW 14i/16i/18t/20TFSi/20TSI Standard Size High Performance Rod Bearing Set

ACL
ACL Audi TFSI 1984cc 4 cyl. (CDL) S3, TTS Standard Size High Performance Rod Bearing Set

ACL
ACL VW/Audi 1781cc/1984cc Standard Size High Performance Rod Bearing Set - CT-1 Coated

ACL
ACL VW 2.0L TSI/TFSI EA888 4cyl Standard Size High Performance Main Bearing Set w/.001 Oil Clearance

ACL
ACL Audi A3/A4/A6 -VW Jetta/Golf Passat Standard Size High Performance Rod Bearing Set

ACL
ACL VW/Audi 1781cc/1984cc Standard Size High Performance w/ Extra Oil Clearance Main Bearing Set

ACL
ACL VW/Audi 1781cc/1984cc 0.50 Oversized High Performance Main Bearing Set

ACL
ACL Audi TFSI 1984cc 4 cyl. (CDL) S3, TTS .025mm Oversized High Performance Rod Bearing Set

ACL
ACL VW/Audi 1781cc/1984cc 0.25 Oversized High Performance Main Bearing Set

ACL
ACL VW/Audi 1781cc/1984cc 0.25 Oversized High Performance Main Bearing Set - CT-1 Coated

ACL
ACL Audi TFSI 1984cc 4 cyl. (CDL) Standard High Performance w/ Extra Oil Clearance Rod Bearing

ACL
ACL VW/Audi 1781cc/1984cc 0.25 Oversized High Performance Rod Bearing Set - CT-1 Coated

ACL
ACL VW/Audi 1781cc/1984cc 0.025 Oversized High Performance Rod Bearing Set - CT-1 Coated

aFe
aFe 05-19 VW 1.8L/2.0L w/o Oil Sensor Engine Oil Pan Raw POWER Street Series w/ Machined Fins
FAQ
Frequently Asked Questions About the Audi A4
What are the best aftermarket parts brands for the Audi A4?
The top brands MOTORMIA owners trust for Audi A4 builds are EBC, PowerStop, H&R, Bilstein, and Magnaflow. The catalog carries 3,135 parts that fit the A4. Use the fitment selector to filter to your specific year and trim, then browse by category or brand.
What's the best trim or sub-model of the Audi A4 to modify?
The most-modified A4 trims are S4 (especially B5 / B7 / B8 / B9 supercharged). These trims typically came with performance-focused suspension, brakes, and engine options that give a higher starting point. That said, the A4's engine family (1.8T, 2.0T EA888, 3.0T supercharged (S4), 4.2 V8 (B7 RS4)) shares aftermarket across most trims, so base-trim builds with the right bolt-ons can match higher trims on power.
What's the typical mod path for a Audi A4?
For most Audi A4 builds, the recommended modification order is: ECU tune → intake → downpipe → suspension → turbo upgrade. This sequence stages upgrades so each mod supports the next — tuning unlocks gains from intake/exhaust, suspension keeps the added power planted. MOTORMIA member builds let you see exact part lists for Audi A4 builds at every power level.
How does the Audi A4 aftermarket compare to the BMW 3 Series?
The Audi A4 is the Quattro AWD compact sedan with the EA888 2.0T platform shared across Audi/VW. On MOTORMIA, 3,135 parts fit the A4 across 3,000+ active member builds, with an average part MSRP of $711. The decision usually comes down to which platform you own — both have full bolt-on catalogs.
Will any Audi A4 part fit my year and trim?
Not always. The Audi A4 has had multiple generations and engine changes (e.g., 1.8T, 2.0T EA888, 3.0T supercharged (S4), 4.2 V8 (B7 RS4)), and parts are generation- and trim-specific. MOTORMIA's catalog uses verified fitment data — every product page shows exactly which years and submodels of the A4 a part fits. Use the fitment selector at the top of any page to pre-filter to your build.
Does MOTORMIA offer returns on Audi A4 parts?
Yes. Most Audi A4 parts on MOTORMIA are eligible for our 30-day return policy provided they're unused, uninstalled, and in original packaging. Special-order parts are flagged with a "Special Order" badge on the product page. Manufacturer warranties are processed through MOTORMIA on your behalf.
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Personalized Audi A4 mod recommendations, verified fitment from real A4 owners, and a garage that tracks every part on your build.
- Mod recommendations tuned to your A4 year, trim, and submodel
- Verified fitment data from 3,000+ Audi A4 member builds
- Performance gain estimates based on real-world results
- Save your garage and track every part you've installed