2003 Audi A4 Tune-Up Parts
187 parts verified to fit your 2003 Audi A4 for a complete tune-up. This is an easy DIY project — estimated 1-2 hours.
Air Filters
(8)primary
Valeo
1999-2009 Audi A6/A6Q Cabin Air Filter
$39.38
aFe
aFe MagnumFLOW Air Filters OER P5R A/F P5R Audi A4 02-09
$91.00
aFe
aFe MagnumFLOW Air Filters OER PDS A/F PDS Audi A4 02-09
$97.00
Standard Motor Products
Air Cleaner Check Valve
$15.60
Denso
Air Filter
$22.10
Hengst
Air Filter
$14.97
Beck Arnley
AIR FILTER
$18.65
ATP
ATP Carbon Activated Premium Cabin Air Filter
$28.47
Fuel Injectors
(8)companion
Bosch
Bosch Gasoline Injector
$87.46
DeatschWerks
DeatschWerks 01-06 Audi A4/TT / 00-06 Volkswagen Golf GTI Bosch EV14 1500cc Injectors (Set of 4)
$879.62
DeatschWerks
DeatschWerks 01-06 Audi A4/TT / 00-06 VW Golf GTI Bosch EV14 1200cc Injectors (Set of 4)
$582.66
DeatschWerks
DeatschWerks 01-06 Audi A4/TT / VW Golf GTI 1000cc Injectors
$429.06
DeatschWerks
DeatschWerks 01-06 Audi A4/TT / VW Golf GTI 440cc Injectors
$336.90
DeatschWerks
DeatschWerks 01-06 Audi A4/TT / VW Golf GTI 650cc Injectors
$398.34
DeatschWerks
DeatschWerks 01-06 Audi A4/TT / VW Golf GTI 750cc Injectors
$408.58
DeatschWerks
DeatschWerks 02-08 Mini Cooper S 1.6L Supercharged 550cc Injectors - Set of 4
$336.90
Fluids & Additives
(8)consumable
Bosch
Bosch Oil Filter
$8.09
Bosch
Bosch Oil Filter
$9.17
Bosch
Bosch Oil Filter
$9.15
Dorman
Breather Elbow - Connects the hard vent tube to the intake hose
$18.72
Dorman
Breather Hose - Connects directly to first PCV
$13.00
URO Parts
Breather Hose Connector
$14.49
Febi
Breather Hose for crankcase
$15.38
Vaico
Cap, oil filler
$8.91
Tune-Up for Other Audi A4 Years
Other Jobs for Your 2003 Audi A4
Frequently Asked Questions
What parts do I need for a tune-up on my 2003 Audi A4?
A complete tune-up on the 2003 Audi A4 typically requires air filters, fuel injectors, fluids & additives. All parts shown on this page are verified to fit your specific vehicle.
How long does a tune-up take on a 2003 Audi A4?
A tune-up typically takes 1-2 hours and is rated as easy difficulty. Actual time may vary depending on your experience and the specific parts being replaced.
Can I do a tune-up myself?
Yes! A tune-up is an easy DIY project that most people can do with basic hand tools. It's a great way to save money on labor costs.
Are these parts guaranteed to fit my 2003 Audi A4?
Yes, all parts on this page are verified to fit the 2003 Audi A4 using VCDB fitment data from manufacturers. Our fitment information is cross-referenced with industry-standard vehicle databases to ensure accuracy.
What brands make tune-up parts for the 2003 Audi A4?
We carry tune-up parts from trusted brands including Valeo, aFe, Standard Motor Products, Denso, and Hengst. Filter by brand to find your preferred manufacturer.
How much does a tune-up cost for a 2003 Audi A4?
The cost of a tune-up for the 2003 Audi A4 depends on the parts and brands you choose. Browse the parts on this page to see current pricing. Doing the work yourself saves significantly on labor costs.