BMW 325i E90 N52B25 DISA Valve Failure Rough Idle
BMW
3 Series
2005
N52B25 2.5
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
⚠️ Drive with Caution
Safety Impact
Indirect risk — worth monitoring, not urgent
Urgency Level
🟡 Monitor Closely
The DISA (Differentiated Air Intake System) valve on N52B25 in E90 325i can fail causing rough idle, hesitation and P1520. The plastic valve body cracks. Replacement DISA valve costs £100-200.
Onarım / Çözüm
No confirmed fixes yet. Share yours below.
⚠️ Yanlış Teşhis mi?
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.
🚗 More About This Vehicle
Explore more BMW models
📖 Related Repair Guides
Deneyiminizi paylaşarak diğer araç sahiplerine yardım edin.
Your real-world fix helps thousands of drivers worldwide. Takes 2 minutes.