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2013 Q7 3.0L has a worsening problem with air in the brake system over the last 2-3 years

721 views 0 replies 1 participant last post by  MartyD  
#1 ·
The master cylinder and the brake booster were replaced and the brakes flushed 3-4 times.

Six weeks ago pressure-bleeding the brakes gave a firm brake pedal but already the pedal travel is almost to the floor, with a noticeable whoosh of air when pressing the pedal.

So, what are the possible problems when the brake pedal has 6-8" of travel and you hear air each time?

Any ideas?