BMW 3 Series MAF Sensor Failure — Rough Running Poor Economy
BMW
3 Series
2005
N52/N54/N47
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
⚠️ Drive with Caution
Safety Impact
Indirect risk — worth monitoring, not urgent
Urgency Level
🟡 Monitor Closely
MAF sensor contamination on BMW 3 Series causes incorrect air mass readings, leading to poor fuel economy, hesitation and rough running. P0100/P0101/P0102 stored. Clean with MAF cleaner spray before replacing. Cleaning costs £5-10; replacement sensor £80-200.
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 2005 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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