BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)


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      Yesterday, 09:49 PM   #1
Second Lieutenant
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Drives: 2013 BMW 128i Coupe M Sport
Join Date: Jul 2013
Location: United States, Beverly Ma.

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Whirring Fan Sound When Braking

Any idea what this is? It's whirring fan sound when i'm braking. It stops when the vehicle comes to a halt. It only happens when braking. When I turn off the fan the sound goes away.

2013 128i M Sport Package, Carbon Black Metallic, Black Kidney Grilles, BMW Performance Exhaust, BMW Performance Intake, AFE Dynamic Air Scoops, BMW Performance Aluminum Strut Bar, CF Delete, Active Autowerke Stage 2 Tune, Performance Pedals, M3 Front Sway Bar, TMS Wheel Spacers.
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      Today, 02:09 PM   #2
First Lieutenant

Drives: 2010 135i, 2014 Ford Escape Ti
Join Date: Nov 2009
Location: NJ

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I have the same noise braking and turning left. I did a search and found that the blower motor bearing tends to rust and needs to be cleaned and lubed to get rid of the problem.
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