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Audi S4 B6 (2003-2005)
Technical Articles

Welcome to our Audi S4 Technical Articles section. We've gathered a vast collection of useful articles to help you perform many repairs and upgrades on your Audi S4. Save money by doing your own work and perform the repairs using the information we've provided here. Can't find what you're looking for? Try our Search Engine at the top of the page, or hop over to one of our Technical Bulletin Boards - focusing on repairs for all Audi cars! If you'd like to support the site and submit your own Technical Article, contact us here!

 Basics & Essentials
Wiper Blade Replacement
Don't wait until the weather turns bad to replace your wiper blades
     Applies to: Audi S4 (2003-05)
Under Body Tray Removal
You will need to remove the under trays to perform most work on the motor, let this article show you how.
     Applies to: Audi S4 (2003-05)
 Brakes
ABS Sensor Replacement
Fix problems with your ABS system by replacing the sensors
     Applies to: Audi S4 (2003-05)
ABS Control Module Replacement
Get your ABS system working correctly by replacing the control unit
     Applies to: Audi S4 (2003-05)
Brake Booster Vacuum Pump Replacement
Replacing your brake booster vacuum pump is explained in the article
     Applies to: Audi S4 (2003-05)
Brake Pressure Sensor Replacement
Replace your brake pressure sensor with help from this article
     Applies to: Audi S4 (2003-05)
Brake Servo Pressure Sensor Replacement
If you start getting a different brake feel your brake servo pressure sensor may be the problem
     Applies to: Audi S4 (2003-05)
Parking Brake Cable Adjusting and Replacement
This article will show you how to install and perform the initial adjustment on your parking brake
     Applies to: Audi S4 (2003-05)
Brake Fluid Level Sensor Replacement
Checking and replacing the brake fluid level sensor should be part of your regular brake system check up
     Applies to: Audi S4 (2003-05)
Brake Master Cylinder and Reservoir
Replace the master cylinder and reservoir help from this article
     Applies to: Audi S4 (2003-05)
Brake Booster Replacement
Get back to proper brake pedal effort by replacing your brake booster
     Applies to: Audi S4 (2003-05)
 Suspension
Drive Axle Replacement
If your CV joints go bad you will need to replace the drive axle
     Applies to: Audi S4 (2003-05)
Front Wheel Bearing Replacement
Howling noise from the front wheels may mean it is time to replace the wheel bearing
     Applies to: Audi S4 (2003-05)
Changing Your Torque Mount Bushing
Stop unwanted engine torque movements by replacing your torque bushing
     Applies to: Audi S4 (2003-05)
Rear Wheel Hub and Bearing Replacement
Replace your rear wheel hub and bearing with help from this article
     Applies to: Audi S4 (2003-05)
Front Lower Control Arms
Check your lower control links every 10,000 miles and replace at the first sign of failure
     Applies to: Audi S4 (2003-05)
Replacing Rear Springs
Improve your handling by changing rear springs
     Applies to: Audi S4 (2003-05)
Replacing Rear Suspension Bushings
This article covers replacing all the rear suspension bushings
     Applies to: Audi S4 (2003-05)
Replacing Rear Shocks
Improve your handling by changing rear shocks
     Applies to: Audi S4 (2003-05)
 Electrical
Outside Air Temperature Sensor Replacement
Trouble with your HVAC system? Don't forget to check or replace the outside air temperature sensor
     Applies to: Audi S4 (2003-05)
How to Replace Your Alternator
Don't get stranded by a poorly operating electrical system. Replace your alternator at the first signs of trouble
     Applies to: Audi S4 (2003-05)
Voltage Regulator Replacement
Replace your voltage regulator with the help of this article
     Applies to: Audi S4 (2003-05)
Steering Column Stalks and Switch Replacement
Fix faulty steering column switches with help from this article
     Applies to: Audi S4 (2003-05)
Replacing Your Headlight Switch
Get working lights again by replacing your headlight and dimmer switches
     Applies to: Audi S4 (2003-05)
Replacing Your Ignition Switch and Lock Cylinder
Replace your lock cylinder or ignition switch at the first signs of trouble
     Applies to: Audi S4 (2003-05)
Radio Removal
Remove or upgrade your radio with help from this article
     Applies to: Audi S4 (2003-05)
Brake Light Switch Replacement
Get your brake lights working again by replacing your brake light switch
     Applies to: Audi S4 (2003-05)
Third Brake Light Replacement
Don't get hit from behind because of a non functioning third brake light. Replace your third brake light with these step by step instructions
     Applies to: Audi S4 (2003-05)
 Water Cooling
Coolant Expansion Tank Replacement
Replace your old and leaking coolant tank with the help of this article
     Applies to: Audi S4 (2003-05)
Windshield Washer Reservoir And Pump Replacement
See out your windshield by replacing your leaky reservoir or broken windshield washer fluid pump
     Applies to: Audi S4 (2003-05)
Coolant Temperature Sensor Replacement
Getting faulty readings from your coolant temperature sensor. Replace it with help from Pelican Parts
     Applies to: Audi S4 (2003-05)
Shroud and Fan Replacement
If your cooling fans are starting to make unusual sounds it might be time to replace them
     Applies to: Audi S4 (2003-05)
 Body & Interior
Glove Box Removal
Remove your glove box with these easy step by step instructions
     Applies to: Audi S4 (2003-05)
Removing Your Blower Motor and Resistor
Replace your blower motor and resistor with help from this article
     Applies to: Audi S4 (2003-05)
Removing Your Wheelwell Liners
You need to remove the wheelwell liners to get access to many things. Learn how here.
     Applies to: Audi S4 (2003-05)
Headlight Assembly and Bulb Replacement
See better by replacing your head light bulbs with the help of this article
     Applies to: Audi S4 (2003-05)
Taillight Assembly and Bulb Replacement
Let the world know you're out in front by replacing your tail light bulbs with the help of this article
     Applies to: Audi S4 (2003-05)
Instrument Cluster Removal
Replace your instrument cluster with these step by step instructions
     Applies to: Audi S4 (2003-05)
Hood And Trunk Shock Replacement
Tired of have the hood or hatch fall on your head? Replace the shocks with the help of this article
     Applies to: Audi S4 (2003-05)
Rear Bumper Removal
Freshen up that tired or damaged rear bumper cover
     Applies to: Audi S4 (2003-05)
Replacing Your Shift Knob
Freshen up the look of your interior with a new shift knob
     Applies to: Audi S4 (2003-05)
Climate Control Removal
Replace your climate control unit is easy with help from this article
     Applies to: Audi S4 (2003-05)
Removing Your Rear Door Panels
This article will show you how to remove your rear door panels
     Applies to: Audi S4 (2003-05)
Replacing Your Rear Window Regulator
Get your windows working again by replacing the worn out rear window regulators
     Applies to: Audi S4 (2003-05)
Removing Your Steering Wheel and Air Bag
Safely remove your steering wheel and air bag
     Applies to: Audi S4 (2003-05)
Replacing Your Rear Door Locks
If your rear door locks fail this article will show you how to replace them
     Applies to: Audi S4 (2003-05)
Center Armrest Replacement
Replace a broken or damaged armrest with help from this article
     Applies to: Audi S4 (2003-05)
Replacing Your Rear Door Component Carrier
The rear door component carrier must be removed to work on any of the systems in the door and this article will show you how
     Applies to: Audi S4 (2003-05)
Replacing Your Rear Door Handles
Replace your rear door handles with help from this article
     Applies to: Audi S4 (2003-05)
Seat Removal
Remove your front and rear seats with the step by step instruction in this article
     Applies to: Audi S4 (2003-05)
Rear Interior Panel Removal
To service your rear bumper you will need to remove the rear interior trim pieces
     Applies to: Audi S4 (2003-05)
Removing Your Center Console
Remove the center console with these step by step instructions
     Applies to: Audi S4 (2003-05)
Removing Your Front Door Panels
This article will show you how to remove your front door panels
     Applies to: Audi S4 (2003-05)
Rear View Mirror Replacement
Replace a broken mirror or the complete housing with help from this article
     Applies to: Audi S4 (2003-05)
Front Door Component Carrier Removal
The front door component carrier must be removed to work on any of the systems in the door and this article will show you how
     Applies to: Audi S4 (2003-05)
Front Door Panels Switch Replacement
Replacing your door switches is made easy with help from this article
     Applies to: Audi S4 (2003-05)
Front Door Tumbler and Handle Replacement
The front driver door tumbler is the only tumbler on the car so replace it at the first signs of trouble
     Applies to: Audi S4 (2003-05)
Replacing Your Rear Door Locks
If your front door locks fail this article will show you how to replace them
     Applies to: Audi S4 (2003-05)
Replacing Your Front Window Regulator
Get your front windows working again by replacing the worn out window regulators
     Applies to: Audi S4 (2003-05)
Drivers Lower Storage Compartment Removal
You will need to remove the driver lower storage compartment to service the pedal box, switches and sensors under the dash; this article will show you how
     Applies to: Audi S4 (2003-05)
Got more questions? Join us in our Audi Technical Forum Message Boards, and ask a question to one of our many automotive experts.
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