2001-03. 2004 W/O STABILITY CONTROL. Vacuum valve grommet. A Grommet for a Power Brake Booster vacuum switch. Part included in Booster assembly. Power Brake Booster Check Valve Seal. Power Brake Booster Grommet. Vacuum Switch. Check Seal. Included with: Booster, Booster assembly, Check Valve, Power Booster.