In addition to impeccable handling and lean features, your Audi A4 boasts an extremely balanced engine system - and stellar fuel efficiency, to boot. If you begin to notice that the latter of these features, in particular, is beginning to wane when you drive your executive sedan, be sure to check that your A4 oxygen sensor is not compromised.
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The O2 sensor for Audi A4 is part of your car's emission control system and is responsible for feeding data to the engine management computer. Specifically, its purpose is to assist the engine by keeping a certain air-to-fuel ratio, which balances emissions, fuel economy and power. When this part fails, the computer doesn't sense the proper mixture and ends up guessing. The ultimate result of this is overall poor performance and diminished fuel efficiency. Fortunately, AutoAnything has you covered with a terrific selection of O2 sensors to restore your luxury ride.