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Audi Technical Articles

Welcome to our Audi technical articles section. We've gathered a vast collection of useful articles to help you repair many items on your Audi. Save money by avoiding your mechanic and perform the repairs using the information we've provided here. Try our Search Engine, our Technical Article Directory or hop over to our Bulletin Board and ask your question to the thousands of members who post messages there every day.

Audi Technical Articles
Audi Technical Articles
Audi A4 (2002-2008) B6 Technical Articles
Audi A4 (2002-2008) B6 Technical Articles
Audi A4 (2002-2008) B6 Technical Articles
 Basics & Essentials - Audi A4 B5 (1997-2001)
Jacking Up Your Car
Most common tasks need the car to be jacked up in the air. But where should you place the jack, and what is the safest method of lifting it? It's all answered here.
     Applies to: Audi A4 (1997-01)
Serpentine Belt Replacement
The serpentine belt can seem a bit daunting to replace the first time you look at it. Here's some detailed instructions on how to change it easily.
     Applies to: Audi A4 (1997-01) - VW Passat (1996-00)
Oil Change
The most common task to do on your Audi A4 is explained thoroughly in this helpful article.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Air Filter Replacement
New to working on your Audi? Not sure where the air filter is? Check out this simple article.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
 Engine
Spark Plug Replacement
Spark plugs are an important part of your engine - make sure that they are replaced every 60,000 miles or so, to keep your ignition system running smoothly.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Camshaft Position Sensor Replacement
A bad cam sensor can prevent the engine from starting. Here's how to change it out in under 10 minutes.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Exhaust Manifold Gasket Replacement
Over time, the exhaust manifold gaskets can wear out and start to leak. Here's how to replace them.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Intake Manifold Removal
Some jobs on the Audi A4 require removal of the intake manifold. This article will show you how to remove it without breaking a sweat!
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Timing Belt Replacement
Replacing the timing belt is an important maintenance job. This article outlines the steps required to changing it yourself.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Valve Cover Gasket Replacement
Got a small oil leak coming from the valve cover or spark plug tubes? Follow the steps in this article to fix the leak.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Engine Mount Replacement
Engine mounts on your Audi will wear out over time. If your engine mounts are loose or leaking, then that's a clear sign that they need to replaced.
     Applies to: Audi A4 (1997-02)
Reading ECU Codes
Learn to diagnose and clear fault codes with this tech article
     Applies to: Audi A4 (1997-02)
 Fuel Injection
Fuel Filter Replacement
You should replace your fuel filter about every 10,000 miles or so. This technical article shows you how to perform this relatively easy maintenance task.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Fuel Injector Replacement
Sometimes, fuel injectors can get clogged and stop working. Remove them in no time with this article!
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Fuel Pressure Regulator Replacement
The fuel pressure regulator keeps a constant pressure on the fuel rail. If this regulator fails, don't fret, this article shows you how to swap it out.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Fuel Pump Replacement
Fuel pumps tend to wear out over time. The steps outlined in this article will show you how to access the pump and replace it!
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Oxygen Sensor Replacement
Old, worn out oxygen sensors can cause poor mileage, low power and a variety of fuel injection problems. Learn how to replace them today with this handy article.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
 Water Cooling
Coolant Flush
Your coolant should be changed every two years or so. If you haven't done so in decades (it's okay, we won't tell anyone), this article will show to do it on an Audi A4.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Heater Core Flush
Heater not working? Sometimes, corrosion in the cooling system can clog the heater core. Here's how to flush it out.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Radiator and Hose Replacement
This article shows you how to replace the radiator and all of the heater hoses on an Audi A4.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Water Pump Replacement
Car starting to overheat? Heater not working like it used to? Occasionally, the water pump will fail and will need to be changed. This article will show you how to swap it out without bruising your knuckles!
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
 Transmission and Axles
Differential Fluid Change
One of the easiest tasks to perform on your Audi A4 is to change the differential fluid, but just in case you need a bit of guidance, be sure to read this article first.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Transmission Fluid Change
In this article, we go over the procedure for changing the transmission fluid in an Audi A4.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Clutch Slave Cylinder Replacement
This tech article gives you step by step instructions to replace the clutch slave cylinder in your Audi A4
     Applies to: Audi A4 (1997-02)
Transmission Mount Replacement
Vibration or noise when shifting? This tech article shows you how to replace your transmission mounts.
     Applies to: Audi A4 (1997-02)
Transmission Removal
Getting to that clutch is no easy task, but it can definitely be done by the average home mechanic following this step-by-step process.
     Applies to: Audi A4 (1997-02)
Clutch and Release Bearing Replacement
Slipping or grinding gears, clutch not working? This tech article shows you how to replace the clutch on your Audi manual transmission.
     Applies to: Audi A4 (1997-02)
 Turbocharging
Intercooler Cleaning
Over time, the inside of an intercooler can become coated with oil vapor and other contaminants. Follow the steps outlined in this article to get the most out of your intercooler.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Replacing the Diverter Valve
This article goes into the steps involved in replacing the diverter valve on an Audi A4.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Turbocharger Rebuild
Rebuilding a turbocharger isn't all that difficult (no really! We kid not). This article goes into the steps required to tackling this often daunting task.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Turbocharger Replacement
Need to replace your turbocharger? This article goes into detail explaining the steps involved to replacing this unit.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
 Brakes
Bleeding Brakes
Another tricky process. Here's a couple of hints and tips gathered from some good and bad experiences in brake bleeding.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Front Brake Pad and Disc Replacement
Want to know how to perform this relatively easy task and save some money at the same time? Check out our step-by-step instructions on front brake pad and disc replacement.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Rear Brake Pad and Disc Replacement
Want to know how to perform this relatively easy task and save some money at the same time? Check out our step-by-step instructions on rear brake pad and disc replacement.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Replacing Brake Lines
Repeated heat cycling and fluid contamination will eventually cause the lines to swell and crack. You've been warned, so now it's time to take action.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
How to Change the Front Brake Rotors and Brake Pads in Your VW Passat
Stop! Yes, that's exactly what you want to do...but you can't always do so effectively if your front brake rotors or pads are worn too thin. Learn how to replace them both properly in this article here.
     Applies to: Volkswagen Passat (1996-2005)
 Suspension
Front Springs and Shocks
Replacement of your front shocks and springs is one of the most common procedures for your A4. See these instructions for complete details on the replacement process.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Front Sway Bar Replacement
Looking to replace your front sway bar or replace the mounting bushings? Follow this article to get this done right (the first time around)!
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Rear Springs and Shocks
Replacement of your rear shocks and springs is one of the most common procedures for your A4. See the instructions here for complete details on the replacement process.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Rear Sway Bar Replacement
Looking to replace your rear sway bar or replace the mounting bushings? This article will guide you to getting this job done in a jiffy!
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Replacing Front Upper Control Arms
Doing a front suspension rebuild? You may also need to replace your front control arms. If so, this article will show you how.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Tie Rod Ends Replacement
Use this tech article to learn how to inspect and replace the tie rod ends on your Audi A4.
     Applies to: Audi A4 (1997-02)
 Electrical
Alternator Replacement
Battery not charging anymore? Over time, the alternator can wear out, preventing the charging system from working. Here, we'll go over the steps involved with changing it.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Center Display Repair
The center display on the Audi A4 is known to have issues. This article will show you how to easily remove it to have it repaired.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
ECU Replacement
Looking to boost the power in your A4? Often times, this involves removing the ECU and sending it to a manufacturer to have software installed. Here's how you do it.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Starter Replacement
If you've determined that the starter in your Audi is bad, learn how to replace it without electrocuting yourself by reading this article first.
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
 Body & Interior
Wiper Motor Removal
Wipers not working anymore? It could be your wiper motor. Here's how you change it out.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Cabin Air Filter Replacement
Changing the cabin air filter is literally a snap with our handy replacement guide.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Cleaning Sunroof Drains
Frequently, the sunroof drains can become clogged with dirt, leaves and other debris. Don't want to get your hands dirty? We agree! So we've created this article for you to follow and get those drains flowing freely again!
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Fixing Lower Door Trim
The lower trim pieces on the A4 can rust out over time, causing them to fall off the car and making your baby look ugly. Follow the steps outlined in this article to restoring the beauty back into your pride and joy.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Floppy Door Handle Fix
The door handles on the A54 are known for breaking and causing a floppy door handle (and a ton of headaches). This article will show you just how to replace them.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Front Bumper Removal and Service Position
Many jobs on the Audi A4 require that the front of the car be extended into a service position. Here's how you do it.
     Applies to: Audi A4 (1997-01) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
Trunk Debadging
Want a stealthier look for your A4? Here's how to remove your rear trunk emblems and keep those envious drivers guessing!
     Applies to: Audi A4 (1997-02) - Audi TT (2000-04) - VW Passat (1996-00) - VW Golf (2000-02) - VW Jetta (2000-02) - VW Beetle (1999-02)
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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