IPD sale Volvo Parts
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

2003 XC70 - Brake Booster Pump runs too much

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

Posts: 1
Joined: Sat Jan 12, 2019 7:30 pm
Year and Model: 2003 XC70
Location: Park City, Utah
Has thanked: 0
Been thanked: 0
United States of America

2003 XC70 - Brake Booster Pump runs too much

Post by JLK » Sat Jan 12, 2019 7:42 pm

I searched the site but could not uncover an answer to this specific question.

I replaced the booster vacuum pump and booster switch as they were burned out. The booster vacuum pump runs but seems to run too much. While I am driving I can hear it. I checked the hoses and they seem fine and can’t uncover a leak. Here is the question. Does this year xc70 have a check valve on the hose that runs from the booster switch back to the boster itself. I searched and found schematics which seem that a check valve is supposed to be on that hose but I cant confirm. This is my sons car that he has at school so I do not know the full service history so not sure if this has been worked on before.

Any thought are appreciated.

User avatar
Posts: 4131
Joined: Fri May 24, 2013 6:20 am
Year and Model: S60 2003
Location: Canada
Has thanked: 77 times
Been thanked: 155 times

Re: 2003 XC70 - Brake Booster Pump runs too much

Post by oragex » Sun Jan 13, 2019 2:54 am

Failed brake booster seal at the pedal

2003 2.4i S60 automatic 125k miles
DIY Volvo repairs videos https://www.youtube.com/playlist?list=P ... s0FSVSOT_c

Post Reply