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.
Carrillo
CP Piston & Ring Set for Audi 2.0L TSI 22mm pin, 83.5mm (+1.0mm oversize) 9.5:1
Supertech
Supertech Audi/VW 1.8T 5V Black Nitrided Intake Valve - Set of 18
Supertech
Supertech VW/Audi 1.8T 20V 4cyl Dual Valve Spring Kit
Supertech
Supertech Audi/VW 2.0T FSI 16V Inconel Exhaust Valve - +2mm Oversize - Set of 8
Supertech
Supertech Audi/VW 1.8T 5V Black Nitrided Intake Valve - Set of 12
Carrillo
Carrillo Volkswagen FSI 2.0L (20mm Pin) 5.67in Pro-H 3/8 CARR Bolt Connecting Rods (Single)
Carrillo
Carrillo Volkswagen/Audi TSI 2.0 Pro-H 3/8 WMC Bolt Connecting Rods (Set of 4)
Victor Reinz
MAHLE Original Audi A3 08-06 Oil Filter Adapter Gasket

Gates
Gates K06 94.67in Length 95.236in Circumference .807in Width Micro-V Belt
CP Pistons
CP Piston & Ring Set for Audi/VW 2.0L TFSI - Bore (83.5mm) - Size (+1mm) - CR (9.5) - Set of 4
Brian Crower
Brian Crower Volkswagen/Audi 1.8T Intake Camshaft - Stage 2 - 264 Spec
Carrillo
Carrillo VW 2.0T TFSI Pro-H 3/8 WMC Bolt Connecting Rods (Set of 4)
Supertech
Supertech Audi/VW 2.7T APB Inconel-Nimonic Exhaust Valve - Set of 12
Supertech
Supertech Cam Follower Solid 33.5x25.8x15.5mm - Set of 8
Gates
Gates 05-09 Audi A4 4 Cyl 2.0L Racing Performance Timing Belt
Brian Crower
Brian Crower Volkswagen/Audi 1.8T Camshafts - Stage 2 - 264 Spec
Gates
Gates 03 VW Passat 4cyl 1.8L Timing Belt Component Kit

Gates
Gates 06-09 Audi A4 2.0L Timing Belt Component Kit
Gates
Gates 06-08 Audi A3/05-08 A4/08 & 10 TT / 06 VW Golf/06-09 GTI Timing Belt Auto Tensioner w/ Pulley

Gates
Gates 06-09 Audi A4 2.0L Timing Belt Component Kit with Water Pump

Mahle
Mahle Rings Performance Plasma Moly Steel HV385 Top Ring 3.484in x 1.0MM .143in RW Moly Ring Set

Supertech
Supertech Audi/VW 1.8T 5V Triple Groove Black Nitride Exhaust Valve - Set of 8
Victor Reinz
MAHLE Original Audi A4 06-01 Oil Filter Adapter Gasket

Gates
Gates Audi/VW Timing Belt Component Kit
Carrillo
Carrillo Volkswagen / Audi 2.0L TFSI Pro-H 3/8 WMC Bolt Connecting Rods (4 Cyl)
Supertech
Supertech Audi/VW 1.8T 5V Inconel Exhaust Valve - Set of 8
Brian Crower
Brian Crower Volkswagen/Audi 1.8T Single Spring & Titanium Retainer Kit
Supertech
Supertech Audi/VW 1.8T 5V Black Nitrided Intake Valve - Set of 12

Victor Reinz
MAHLE Original Audi A3 13-09 Oil Filter Adapter Gasket
Clevite
Clevite Volkswagen 1588cc 1780cc 1781cc 1984cc Engines Con Rod Bearing Set

CP Pistons
CP Piston & Ring Set for Audi/VW 1,8L 20 Valve - Bore (81.5mm) - Size (+0.5) - CR (9.5) - Set of 4

Mahle
Mahle MS Volkswagen Golf VII/VII R GTI 2.0T Gen 3 Standard Race Rod Bearing Set
Mahle
Mahle MS Piston Set VW 1.8T 81.00mm Bore 86.4mm Stroke 144mm Rod 20mm Pin -12cc 8.5 CR Set of 4
Eagle
Eagle Volkswagen 1.8T Extreme Duty Connecting Rod (Single)
CP Pistons
CP Piston & Ring Set for Audi/VW 2.0L TFSI - Bore (83.5mm) - Size (+1.0mm) - CR (9.5) - Set of 4
Clevite
Clevite Ford Prod V8 4.6L SOHC-4.6L DOHC 1991-03 V8 5.4L SOHC-5.4L DOHC Con Rod Bearing Set
CP Pistons
CP Piston & Ring Set for Audi/VW 1.8L 20 Valve - Bore (81.0mm) - Size (STD) - CR (8.5) - Set of 4
CP Pistons
CP Piston & Ring Set for Audi/VW 2.0L TFSI - Bore (83mm) - Size (STD) - CR (9.5) - Set of 4
CP Pistons
CP Piston & Ring Set for Audi/VW 2.0L TFSI - Bore (83.0mm) - Size (+0.5mm) - CR (9.5) - Set of 4

King Engine Bearings
King Engine Bearings Audi BYT/ CDNC/ CCZD/ CPSA (Size 0.25) Connecting Rod Bearing Set
Gates
Gates 97-00 Audi A4 1.8L 31/32in x 47 7/8in High Performance Racing Belt
Gates
Gates 00 VW Passat 1.8L Timing Belt Component Kit w/ Water Pump

Gates
Gates 00-05 Volkswagen Passat (1.8t 4-Cyl) Timing Belt
Gates
Gates 00-06 Audi TT 4cyl 1.8L / 00-05 VW Golf/Jetta/Passat 4cyl 1.8L Timing Belt Auto Tensioner

Mahle
Mahle MS VW/Audi 1.8L Turbo Main Bearing Set - STD Size

King Engine Bearings
King Engine Bearings Audi CEPA/CEPB Crankshaft Main Bearings (Size STDX)
Clevite
Clevite VW 1.8L / 2.0L 4 Cyl Performance Con Rod Bearing Set
Gates
Gates 98-05 Volkswagen Passat V6 2.8L Serpentine Belt Kit
CP Pistons
CP Piston & Ring Set for Audi/VW 1.8L 20V - Bore (82mm) - CR (8.5) - Dish (-10.1cc) - Set of 4
Clevite
Clevite Volkswagen 1588cc 1780cc 1781cc 1984cc Engines Con Rod Bearing Set
CP Pistons
CP Piston & Ring Set for Audi/VW 1.8L 20V - Bore (83mm) - Compression Ratio (9.5:1) - Set of 4
Clevite
Clevite Volkswagen 1588cc 1780cc 1781cc 1984cc Engines Con Rod Bearing Set
CP Pistons
CP Piston & Ring Set for Audi/VW 1.8L 20 Valve - Bore (83.0mm) - Size (+2.0) - CR (8.5) - Set of 4

King Engine Bearings
King Engine Bearings Audi BYT/ CDNC/ CCZD/ CPSA (Size 0.26) Connecting Rod Bearing Set
Manley Performance
Manley Audi 1.8L Turbo / Volkswagen 1.8L Turbo H Beam Connecting Rod Set (Set of 4)
Clevite
Clevite Volkswagen 1588cc 1780cc 1781cc 1984cc Engines Con Rod Bearing Set
CP Pistons
CP Piston & Ring Set for Audi/VW 1.8L 20 Valve - Bore (82.0mm) - Size (+1.0) - CR (9.5) - Set of 4

K&N Engineering
K&N Oil Filter Automotive 20-24 Audi RS Q3 2.5L

K&N Engineering
K&N Oil Filter Automotive 07-15 Mazda CX-9

Wagner Tuning
Wagner Tuning VAG 1.8T 20V M11 Upgrade Head Stud Set - Burnished
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.
MOTORMIA APP
Build your Audi A4 with Mia
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