Some Toyota vehicles may exhibit a rattle or buzz type noise at the driver’s side instrument panel area. The noise can be duplicated when lightly accelerating and then decelerating, or when depressing the brake pedal with the shift lever in Park and then releasing the brake pedal.
An updated vacuum check valve is now available to reduce this noise.
Confirm that the noise is coming from the brake booster vacuum check valve.
Remove the vacuum tube clip from the brake booster check valve and disconnect the tube.
Remove and replace the brake booster vacuum check valve. Reconnect and confirm that no leak is present. Confirm that the noise has been eliminated.
MODEL VALVE SHAPE OLD P/N NEW P/N
2007-2010 Camry Straight valve 44730-22150 44730-20080
2008-2009 Highlander Straight valve 44730-22150 44730-20080
2005-2010 Avalon Straight valve 44730-22150 44730-20080
2006-2009 RAV4 90-degree 44730-12070 44730-14050
2004-2010 Sienna 90-degree 44730-12070 44730-14050
Sign up for a FREE subscription to Auto Service Professional magazineSubscribe