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So, I've had my 2002 9-3 for a few weeks now, I recently replaced the alternator, welded some holes in the oil cooler, replaced the oil pressure sensor, re-torqued the cylinder head, replaced the valve cover gasket and patched a tire. It's been keeping me busy so far.

My latest debacle involves the brakes. I'll be driving along, all will be well, and then the brakes slowly apply a bit. The front wheels seem to be grabbing harder than the rear, they get hotter. It generally goes away in a bit of driving, but then it comes and goes. Seems to only happen when it's hot. From the research I've done, I thought maybe it's an oil leak from the turbo finding its way to the brake booster. I've also noticed that sometimes I can hear a bubbling-type noise when I've got the brakes applied at a stop. I'm not sure, I haven't seen this exact problem mentioned elsewhere.

Any ideas on where to begin? This one's got me scratching my head.

Thanks.
 

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Check for adequate free play at the brake pedal.
Change the brake fluid if its older than 3 to 5 years.
That all I can think of:cheesy:
You may need new brake fluid hoses, but this seems to be rare..
Disconnect the vacuum line to the booster and examine its interior walls for evidence of oil, and check/test the diaphragm.
 
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