See attached picture. This hose keeps coming detached and causes the car to shake and the brakes to be very hard to press. What is this hose for and how is it supposed to stay connected?
Looks like a PCV hose, Positive Crankcase Ventilation Valve hose.
It looks to me like the plastic molded piece has separated. You can purchase a new one and replace it or try to repair it. I would go for trying to repair it first myself. A thin bead of Super Glue around the edge should do the trick.
But if you have time you may want to call the dealership and have your VIN# handy. There is a TSB – Technical Service Bulletin out for this part.
Positive Crankcase Ventilation (PCV) Oil Trap and Ventilation Hose Extended Warranty 205
Reference number: SMB 22-205, Date of Issue: January 16, 2009
Volvo: 2004 – 2008 S40; 2005 – 2008 V50; 2006 – 2008 C70; 2007 – 2008 C30
Extended Warranty 205 – PCV OIL TRAP AND VENTILATION
Volvo Cars of North America, LLC and Volvo Cars of Canada Corp. have voluntarily decided to extend warranty coverage for the PCV Oil Trap and Ventilation Hose on model year 2004 – 2008 S40, V50, C70 and C30 vehicles. For eligible vehicles that are beyond the manufacturer warranty period, Volvo will extend the warranty coverage on the PCV Oil Trap and Ventilation Hose for 10 years or 120,000 miles, whichever occurs first, from the date the vehicle was originally placed into service.
Reimbursement for customers who previously paid for repair
Send repair order with a copy of the customer letter to:
Volvo PCV Oil Trap and Ventilation Hose Extended Warranty c/o The Advertising Checking Bureau, Inc
P.O. Box 1919
Memphis, TN 38101
Failed Part # 30788494
Labor Time: 1.6 Hours
It has been identified that in certain LEV2 (Low Emissions Vehicle) vehicles listed above, the material in the PCV (Positive Crankcase Ventilation)oil trap pressure control diaphragm and the crankcase ventilation hose may become cracked due to long term exposure to the crankcase environment. If this occurs it is possible that the MIL (malfunction indicator light) will illuminate and post an ECM (Engine Control Module) 250A code. In addition, there may be a whistle type noise emitted from the crankcase.