*Tools and Materials Needed:*
- Replacement fuel filter
- Fuel filter housing wrench
- A new O-ring for the fuel filter housing
- Pliers
- Screwdriver
- Safety goggles
- Gloves
- Rags
- Funnel
- Gasoline
Step 1: Prepare your vehicle
- Turn off the engine and allow it to cool down completely.
- Engage the parking brake.
- Locate the fuel filter. In the 2001 Audi TT, it is located under the rear passenger seat.
Step 2: Relieve the fuel pressure
- Open the fuel filler cap to release any pressure in the fuel system.
Step 3: Disconnect the fuel lines
- Use a fuel filter housing wrench to loosen the fuel line fittings on the fuel filter housing.
- Be careful not to spill any gasoline.
Step 4: Remove the fuel filter housing
- Once the fuel lines have removed, remove the fuel filter housing using a wrench.
- The old O-ring may stick to the housing and will need to be pried off.
Step 5: Install the new fuel filter
- Place the new O-ring in the groove in the fuel filter housing.
- Insert the new fuel filter into the housing and tighten it into place.
Step 6: Reconnect the fuel lines
- Reattach the fuel lines to the fuel filter housing and fasten them securely with the fuel line fittings.
Step 7: Start the engine
- Turn the ignition key to the "On" position but do not start the engine.
- Check for leaks around the fuel filter housing. If there are no leaks, start the engine.
- Let the engine run for a few minutes to allow the fuel system to pressurize.
- Check again for leaks.
Step 8: Test the fuel system
- Go for a test drive to ensure that the fuel system is functioning properly.
- If you experience any problems, stop driving immediately and take your vehicle to a mechanic.
