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E60 / E61 (2004 - 2010)
BMW 5-Series E60 Sedan was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E61 wagon followed shortly there after. The E60/E61 5 series is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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Old 01-17-2013, 02:43 AM
Leon Speed Leon Speed is offline
Registered User
Location: Germany
Join Date: Jan 2013
Posts: 7
Mein Auto: 525d
Magic Blower (HVAC)

Hello all,

My first post here. I live in Germany and drive a 2008 525d. Have been driving the car for three years and everything has been great. Raked up 100K miles. I have been taking the car to the dealership for maintenance because I like to trade it in soon. Lately a first issue arose, which I like to fix myself if possible.

The issue is, after driving for approximately 1 hour and 15 minutes, the HVAC blower starts blowing harder, then softer again, the harder again, and softer, and on and on. Sometimes itkeeps blowing hard, sometimes it goes back to soft again.

My 1989 Porsche 928 has a resistor pack which controls blower speed and if that pack goes south the same thing happens. I have no idea how blower speed is controlled in my E60 though.

Anyone have encountered this problem and any ideas to fix it?

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