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ubermax 01-20-2014 12:51 PM

Thump Sound When Blower On
'08 X3 , MT - when warmed up and blower on I get a periodic ( every 3 seconds ) thump sound that seems to be coming from the rear of the engine compartment about where the blower fan would be - goes away when blower turned off.

anyone experience the same ? anyone have any thoughts on what might be causing the sound ?

thanks in advance to those who respond .

joylove 01-20-2014 12:53 PM

ubermax 01-20-2014 02:34 PM


Originally Posted by joylove (Post 8088946)

thanks joylove , it's not really a popping sound but more of a dull thump but that could be it .

joylove 01-20-2014 02:55 PM

Drives me nuts.

ubermax 01-23-2014 11:44 AM

Joylove , does your sound go away when you turn the blower off ? also, have you brought it in ( dealership or Indy ) for a diagnosis ? or have you solved it yourself ?

joylove 01-23-2014 07:25 PM

If I shut off the fan yes the noise stops. I'm not going to take it to a dealer, if I can't figure out what it is with the entire world at my fingertips I'm 90% sure they can't.

Hmwilso 11-11-2015 06:43 AM

Did you ever figure the problem out? the exact thing started happening to my car 2 days ago and I'd appreciate any advice I can get! Thanks in advance

bluskye 11-11-2015 07:52 AM

2 of us solved a similar issue, yous sounds the same.

Hmwilso 11-11-2015 08:08 AM

Thank you!

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