Audi Q7 Fuel Sensor Issue Causing Engine Stalls

My 2008 Audi A6 had very similar symptoms. The fuel sensor was failing intermittently, causing the engine to stall and triggering the check engine light on the car dashboard. The main culprits in these cases are typically: 1. Faulty fuel level sensor 2. Damaged wiring to the sensor 3. Corroded sensor connections 4. Failed fuel pump module In my case, the level sensor had corroded connections, affecting fuel pressure readings. The car sensor system was getting incorrect data, causing the engine management to run rich then lean, leading to stalling. The fix required replacing the complete fuel pump assembly since the sensor is integrated. This was a serious repair requiring specialized diagnostic equipment to verify fuel pressure readings. The job involves dropping the fuel tank to access the components, so labor time is significant. Not something that can be partially fixed, the entire assembly needs proper replacement to prevent recurring issues. When I brought it to a certified shop, they first performed a complete fuel system diagnostic to confirm the car sensor readings before proceeding with the repair. The most reliable fix is replacing the entire fuel pump module with a new OEM unit. Given the similarities in our Audi fuel systems, I suggest getting a second opinion from a shop specializing in VAG vehicles, as this repair requires specific expertise.

Thanks for sharing your experience. Sounds exactly like what I am dealing with now with my Audi Q7. After your mechanic replaced the fuel pump assembly and corrected those car electronics issues, did you have any other problems with the fuel level sensor or similar stalling symptoms? Would be really helpful to know how much you ended up paying for the complete repair job. Since my previous mechanic attempted a partial fix that did not work, I want to make sure I budget correctly this time for the full fuel tank repair.

Since getting the fuel level sensor fault fixed properly, my A6 has been running perfectly with no stalling issues. The car sensor system now shows accurate readings on the car dashboard, and I have not experienced any fuel system problems in the last 6 months. The initial attempt at repair only involved checking fuses, which cost 52 Euro but did not resolve the issue. The complete repair including the new fuel pump assembly, labor for dropping the tank, and proper diagnostics came to around 850 Euro. While this might seem high, getting it done correctly with quality parts prevented recurring problems. The key was having a technician who properly diagnosed the car sensor issues instead of trying partial fixes. The investment in a complete repair ended up being more cost-effective than multiple failed attempts at cheaper solutions. Based on the shared symptoms, I would recommend budgeting approximately 800-900 Euro for a thorough fix of your Q7s fuel system, assuming similar parts and labor costs.

Thanks for all the advice. I took my Q7 to a different repair shop last week that specializes in European cars. The mechanic immediately identified the faulty sensor in the fuel system and confirmed it needed a complete fuel pump assembly replacement. The total repair cost came to 890 Euro, including parts and labor. They had to drop the fuel tank to access and replace the entire unit. The mechanic showed me the corroded level sensor and explained how it was causing the erratic readings on my car dashboard. After the repair, the check engine light is finally off and the car runs smoothly with no more stalling issues. Definitely worth paying for the proper fix rather than attempting partial repairs that dont solve the underlying problem. The fuel system now works perfectly and all sensor readings are accurate. While it was more expensive than my previous failed repair attempt, having it fixed correctly the first time by a qualified shop saved money in the long run.