So Fix it

Park your 2002 Audi Quattro wagon somewhere with room around the rear of the car. Make sure the emergency brake is on before you turn the engine off and pull the trunk release latch. Get out of the car and empty out the rear of the car so you have room to work in.

Unscrew the eight Philips head screws that secure the bottom of the trunk panel to the rear hatch. Make sure to keep the screws as replacement Audi parts are a lot more expensive then most other car manufacturers, even though they are just regular Volkswagen parts in most cases. Unscrew the four Philips head screws on the top part of the panel. The panel wont come out now, it is still held in place by pressure.

Pry the panel off the rear hatch with a flathead screwdriver. Push the flathead into the seam and work it along the seam line. Once the panel is standing out all along the edge, then pull the panel off by hand. Place the panel somewhere safe as it can be broken if stepped on. If you are replacing the panel then just follow the removal procedure in reverse.

Support the dual exhaust system with jack stands underneath the Taurus. The catalytic converter needs to be facing the front of the vehicle and the muffler needs to be at the rear of the vehicle.

Secure the dual exhaust piping to the hangers underneath the station wagon. The hangers are metal hooks with a rubber loop attached to the end of the hook. Slide the metal hook on the exhaust system through the rubber loop attached to the bodys metal hooks.

Install the oxygen sensors from the old exhaust system into the dual exhaust using the O2 sensor tool. Thread the O2 sensor and turn it clockwise to tighten. There is one sensor before the catalytic converter and one after.

Plug the electrical connectors into the O2 sensors.

Put a gasket against the mating surface of the exhaust piping and bolt the exhaust piping to the exhaust manifold at the back of the engine.