The procedure for replacing the spark plugs on the A4 3 generation is dependent on the engine type. The easiest way to change the candles on the engine is 1.6 l without turbocharged. To do this, it is necessary to remove the nozzle-tips with the candles, twist old candles and twist the new moment of 30 Nm. The other engines may require the ignition of the ignition. In the 6-cylinder and 8-cylinder engines, the upper part of the air filter shall also be removed. The moment of gravity of the candles for all the motors is the same.