Wanted brake booster parts '99V70 N/A
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    1. #1
      Junior Member
      Join Date
      Apr 2014
      Posts
      24

      Wanted brake booster parts '99V70 N/A

      Looking for a brake booster check valve and possibly a whole booster. Most of the time the brakes work just fine, but a couple of times each trip when I apply the brakes the pedal is very high and very hard, with no apparent braking effect. I then must pump and/or press harder to get the brakes to resume normal operation. I'm guessing the problem must be one of 3 possible components - the check valve, the position sensor, or the booster itself. I don't want to replace all 3 and discover the problem is something else. I'd like to understand why it is happening before throwing time and parts at it. Car has ~100k miles on it and is all original. Suggestions please? I'd like to find a check valve in order to test whether that is the component I need.


      Last edited by Shappy; 03-04-2020 at 09:42 PM.

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    3. #2
      Senior Member ScottishBrick's Avatar
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      Dec 2014
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      Connecticut
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      14,435
      Check valve. Can remove and blow through it to test. Also check for proper vacuum line routing


      Sent from my iPhone using Tapatalk
      2003 V70 T5 - Mystic/Graphite - M56LK - 202k - K24/Greens/Do88 IC/SMF & P2R Clutch/DW300C/H&R/Bilstein TC/Delrin/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 295k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 240k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 215k - Sisters

    4. #3
      Junior Member
      Join Date
      Apr 2014
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      24
      Quote Originally Posted by ScottishBrick View Post
      Check valve. Can remove and blow through it to test. Also check for proper vacuum line routing


      Sent from my iPhone using Tapatalk
      I blew through the hose and no leaks apparent. Problem is intermittent so maybe still could be the check valve. Lowest price I've found so far is Volvo dealer. Surprising?

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