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What 23 owners told NHTSA about the 2011 Audi Q7
These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.
2 of 23 complaints match · Engine · clear filters
Sep 12, 2016Engine
THIS COMPLAINT PERTAINS TO AUDI'S ADBLUE (NOX) SYSTEM. THE NOX SENSOR FAILED, WHEN THE CAR IS DRIVING OR STATIONARY. THE WARNING ALERT STATES THE CAR WILL NOT START WITHIN 600 MILES. THE NOX SENSOR MUST BE REPLACE; OTHERWISE, THE CAR WILL NOT RUN DUE TO THE SOFTWARE LOCK OUT TRIGGERED BY THE SENSOR. I AM FORCED TO REPAIR THE CAR DESPITE THE FACT THE TDI ADBLUE SYSTEM NEVER WORKED PROPERLY AS ADVERTISED BY VW/AUDI. IN MY VIEW, VW/AUDI SHOULD REPLACE THE SENSOR OR VW/AUDI SHOULD OFFER A REIMBURSEMENT FOR ANY COST RELATED TO THE TDI ADBLUE SYSTEM THAT OCCURRED WHILE THE COURT CASE IS PENDING.
NHTSA ODI 10905910
Sep 9, 2014Engine
TL* THE CONTACT OWNS A 2011 AUDI Q7. WHILE DRIVING APPROXIMATELY 40 MPH, THE TEMPERATURE GAUGE SUDDENLY BEGAN TO FLUCTUATE FROM HIGH TO LOW AND THEN BACK TO NORMAL. THE VEHICLE DECELERATED AND STALLED. THE VEHICLE WAS TOWED TO THE DEALER WHO DIAGNOSED THAT THE ENGINE WAS FAULTY AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED AND THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 90,700.
NHTSA ODI 10631921
Working with the data? Download all 23 complaints as CSV · fetched from NHTSA July 10, 2026
How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your
pre-purchase inspection list. Back to the
full 2011 Audi Q7 verdict →