2003 Subaru Impreza Tune-Up Parts
155 parts verified to fit your 2003 Subaru Impreza for a complete tune-up. This is an easy DIY project — estimated 1-2 hours.
Air Filters
(16)primary
K&N
K&N Unique Custom Air Filter Tapered Conical 170mm Base OD x 60mm Top OD x 124mm Height
$94.99
Spectre
Spectre 16-18 Subaru STI 2.5L H4 F/I Replacement Panel Air Filter
$41.99
COBB
Cobb WRX/STi Black SF Intake REPLACEMENT FILTER ONLY - NOT A COMPLETE INTAKE
$66.56
aFe
aFe MagnumFLOW Air Filters OER P5R A/F P5R Nissan Cars 90-11 V6 Trucks 90-10
$71.00
Perrin Performance
PERRIN 02-07 Subaru WRX/STI/Impreza & 04-08 Forester All Panel Foam Filter - Black
$56.95
COBB
Subaru 02-05 WRX Stage 1 Power Package w/V3
$783.32
aFe
aFe MagnumFLOW Air Filters OER PDS A/F PDS Nissan Cars 90-11 V6 Trucks 90-10
$76.00
COBB
Cobb Subaru 02-07 WRX/STi GD High Flow Filter
$76.80
Fuel Injectors
(45)companion
Walbro
Walbro Fuel Pump Kit for 02-07 Subaru WRX/04-07 Subaru WRX STi
$45.58
DeatschWerks
DeatschWerks 02-14 Subaru WRX / 07-14 Legacy GT / 07-14 STI Bosch EV14 1500cc Injectors (Set of 4)
$879.62
DeatschWerks
DeatschWerks 02-14 Subaru WRX / 07-14 STI/Legacy GT Bosch EV14 1200cc Injectors (Set of 4)
$582.66
AEM
AEM 340LPH 65mm Fuel Pump Kit w/o Mounting Hooks - Ethanol Compatible
$155.70
Aeromotive
Aeromotive 02-14 2.0L Subaru WRX/07-14 STi Fuel Rails
$300.31
DeatschWerks
DeatschWerks 255 LPH In-Tank Fuel Pump w/ 02-07 WRX/STi / 93-07 Impreza / 90-07 Legacy Set Up Kit
$109.00
Fel-Pro
Fel-Pro 13-14 Subaru WRX/13-20 WRX STI/11-13 Forester Fuel Injector O-Ring Kit
$10.14
DeatschWerks
DeatschWerks 340 LPH In-Tank Fuel Pump w/ 02-07 WRX/STi / 93-07 Impreza / 90-07 Legacy Set Up Kit
$169.00
Fluids & Additives
(94)consumable
Royal Purple
Royal Purple Premium Synthetic High Performance Multi-Grade 10W30 Motor Oil - 5 Quart
$127.59
LIQUI MOLY
LIQUI MOLY 5L Special Tec B FE Motor Oil SAE 5W30
$214.14
Motul
Motul 1L Synthetic Engine Oil 8100 5W30 X-CLEAN - LL04- MB 229.51- 504.00-507.00
$158.44
LIQUI MOLY
LIQUI MOLY 1L Fully Synthetic Hypoid Gear Oil (GL5) LS SAE 75W140
$204.10
K&N
K&N 03-07 Mitsubishi Lancer Wrench-Off Oil Filer
$17.99
LIQUI MOLY
LIQUI MOLY 20L Top Tec ATF 1200
$204.34
Liqui Moly
Liqui-Moly Longtime High Tech 5W-30 Motor Oil - Size:1 liter
$14.95
LIQUI MOLY
LIQUI MOLY 5L Top Tec 4210 Motor Oil SAE 0W30
$235.53
Tune-Up for Other Subaru Impreza Years
Other Jobs for Your 2003 Subaru Impreza
Frequently Asked Questions
What parts do I need for a tune-up on my 2003 Subaru Impreza?
A complete tune-up on the 2003 Subaru Impreza 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 Subaru Impreza?
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 Subaru Impreza?
Yes, all parts on this page are verified to fit the 2003 Subaru Impreza 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 Subaru Impreza?
We carry tune-up parts from trusted brands including K&N, Spectre, COBB, aFe, and Perrin Performance. Filter by brand to find your preferred manufacturer.
How much does a tune-up cost for a 2003 Subaru Impreza?
The cost of a tune-up for the 2003 Subaru Impreza 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.