Hi fellas,
just wanted to ask about brake fluids. There's a dead link in the article section and search came up empty.
Had front brake pads, rotors and sensors replaced about 5 months ago. Past few weeks, noticed a lot of squeaking. wondering if I should check/replace the brake fluids? if so, where is it located ?

thanks guys...

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2011 X5 35d 123,000 miles sport space gray/oyster

2005 X5 3.0i sport package Style 211
157,500 miles

2005 Chevy Avalanche Z66 BFG T/A Offroads