This 2015 Audi A4 came into the shop with an inaccurate fuel gauge. The owner thought it was the cluster or maybe just a software glitch — but after some quick diagnostics, we found the real issue: a faulty fuel level sensor inside the tank.
This is a common failure on the B8 chassis (2009–2016 A4 models). Over time, the fuel level sensor can become inaccurate or fail completely, causing the gauge to read full when it’s not, or bounce around randomly. Not something you want to ignore.
Every 50,000 miles, we recommend replacing the fuel filter on any Audi that has a serviceable one. Due to age and mileage, by the time the second filter replacement comes around, we always replace the entire fuel pump assembly — not just the filter. That includes the pump, the filter, and the level sensor.
Why? Because these other components are known failure points. Being proactive here helps prevent future breakdowns and saves you the headache (and cost) of an unexpected tow.
