Final Stage Resistor (FSR)
Final Stage Resistor (FSR)
Section titled “Final Stage Resistor (FSR)”The FSR (also called the “hedgehog” for its heat sink appearance) controls blower motor speed. It’s one of the most common E46 failures.
See Common Problems section for detailed diagnosis and replacement procedure.
Quick Reference
Section titled “Quick Reference”- Part: 64 11 6 929 486
- Location: HVAC housing, passenger side under dash
- Symptoms: Blower works only on high, or not at all
- Repair: 15-minute replacement
- Use OEM part — aftermarket FSRs fail frequently