Check Engine Light Due to Knock Sensor Fault on Audi Q7

The Check Engine Light may illuminate with a knock sensor code stored. Our technicians tell us a revised knock sensor and bracket should be installed, along with heat shielding material to protect the new sensor, to correct this condition.

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Average mileage: 76,250 (51,000–120,000)
5 model years affected: 2007, 2008, 2009, 2011, more2012
11 people reported this problem
3 people shared problem details
I was told by the Audi technician during an oil change that they noticed a knock sensor problem that generated a check engine light that came on for a few days and then went out. I haven't had anything done for it yet. 2011 Q7 TDI
2007 Audi Q7120,000
Check Engine Light
2011 Audi Q762,000
Nox Sensor (the 1st of 2) failed at 62,000 miles. Engine light illumination was the only indication. No performance issues noted. Again had a Nox failure at 85,000 miles. Both times the repair cost over $900. This MUST be related to the VW/Audi/Porsche emissions fiasco that is underway. I think both repairs should have been covered as a warranty repair.
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