BMW 320d 330d NOx Sensor Failure — AdBlue Countdown
BMW
3 Series
2015
B47/N57 Euro 6
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
⚠️ Drive with Caution
Safety Impact
Indirect risk — worth monitoring, not urgent
Urgency Level
🟡 Monitor Closely
The upstream or downstream NOx sensor on Euro 6 BMW diesel fails, triggering AdBlue system warnings and an engine start countdown if unresolved. Fault codes P2201/P2202. Always confirm which sensor has failed before ordering. Sensor replacement costs £200-450.
Repair / Solution
No confirmed fixes yet. Share yours below.
⚠️ Wrong Diagnosis?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this BMW 3 Series 2015 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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