Technical Service Bulletins Parts

Toyota brake buzz

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Toyota brake buzz

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

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