It is possible that there are several plug models and references available for your Audi A6. The easiest way to ensure you do not choose the wrong ones, is to dismount one plug and note the reference which you will find on the fitting. Often you'll be able to find this reference on our website. If the reference has been taken out of the offer over time however, you can also measure the plug length and diameter. Mister-Auto offers you affordable spark plugs for your A6 from quality brands including Beru, Bosch or NGK. To determine as well as possible which spark plug references are suitable for your car we recommend you enter your registration number or select the engine type of your Audi A6 in the drop down menu.