Blower Final Stage Fan Resistor May Fail on BMW 530i

The blower final stage fan resistor is known to fail. Symptoms are the heater fan speed varies regardless of the setting, the fan will not turn off when the car is switched off, or the fan will not switch on at all.

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Average mileage: 102,594 (35,000–171,000)
5 model years affected: 2001, 2002, 2003, 2005, more2007
37 people reported this problem
23 people shared problem details
2003 BMW 530i60,000
No cool air coming out of vents but you can hear the ac compressor on.
2002 BMW 530i119,395
The Blower final stage fan resistor switch failed...result, fan blower will continue to run and drain the battery after a couple of hours after being parked. Listen for sporadic fan blower cycling well after the engine has been cut off. In addition, note air flow exiting the arm rest center console between seat. The air flow pressure will fluctuate in strength, but is noticeably obvious as a function that should normally be switched off. New fan blower switch repair will easily run you over $450.00. Be careful not to get caught up with having to replace the entire blower...not necessary.
2002 BMW 530i42,000
2003 BMW 530i113,000
Blower runs when car is off.
Blower turns on and stays on even when vehicle is switched off. The climate control is also unresponsive.
2003 BMW 530i148,000
A/C blower uneven operation; fan continues to run after ignition turned off; car will not start; no juice.
2001 BMW 530i135,000
Blower was acting up, replaced the resistor and it's been working good as new.
2002 BMW 530i127,576
Blower Fan runs loudly and won't shut off when the car shuts off.
2002 BMW 530i171,000
I live in Florida-the last few weeks my heater would go on by itself getting hotter as I drive in 90 degree weather. It will remain on even with the car off. Brought it to a repair shop and they could not figure it out. Brought it to a BMW Dealer and they want to keep it a couple of days with the diagnotic check started at minimum 250.00 without repair. That means Im held hostage for the entire Labor Day day weekend. Going to try replacing the resistor if I can locate one and find a mechanic to believe thats what it is. Im a single MOM and most mechanics take me for granted.
Same problem. Bought a new resistor and it works fine now.
2002 BMW 530i70,000
fan went on during the night while parked. Battery died. Called road service and replaced the battery. One week later new battery died. Took to dealer, replaced with BMW recommended battery. Died one week later. Took to local shop and paid $100.00 to study problem could not find problem. After a few months of this, I walked into the garage at 11PM one night and heard the heater fan running. Took the car to the dealer the next day, explained what I heard, and they replace some part and the problem is now history. The part was activating the blower to run during the nights which over time drained the battery. My current problem at 170,000 miles is Air Bag is making a knocking noise and cannot find anything in the internet regarding others having this problem.
2002 BMW 530i35,000
But problem started long before, I just had no idea until I searched the net.
2001 BMW 530i164,500
The blower will not turn off or cool the car
2002 BMW 530i113,000
Replaced fan assembly.
2003 BMW 530i124,000
AC/Heater fan does not work
I am having the same problem. can anyone email a solutionand if it is something i can fix myself?
2003 BMW 530i55,000
blower fan fail
2002 BMW 530i108,758
blower fan will not switch on .
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