Toyota booster buzz

Dec. 1, 2013
Some Toyota vehicles may exhibit a rattle or buzz type noise coming from the driver’s instrument panel area. The noise can be duplicated when lightly accelerating and the 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

Some Toyota vehicles may exhibit a rattle or buzz type noise coming from the driver’s instrument panel area. The noise can be duplicated when lightly accelerating and the 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.

This TSB applies to 2005-2010 Avalon, 2007-2010 Camry, 2008-2009 Highlander, 2006-2009 RAV4 and 2004-2010 Sienna vehicles.

PARTS INFORMATION FOR VACUUM VALVE ASSEMBLY

MODEL       YEAR             VALVE SHAPE         OLD P/N                    NEW P/N

Camry          2007-2010         Straight                 44730-22150             44730-20080

Highlander  2008-2009        Straight                 44730-22150             44730-20080

Avalon          2005-2010        Straight                 44730-22150             44730-20080

RAV4            2006-2009        90-degree              44730-12070             44730-14050

Sienna         2004-2010        90-degree              44730-12070             44730-14050

 Confirm that the noise is coming from the brake booster vacuum check valve.

  1. Remove the vacuum tube clip from the brake booster check valve and disconnect the tube.
  2. Remove and replace the brake booster vacuum check valve. Make sure that the new valve is fully seated into the brake booster grommet.
  3. Reconnect the vacuum tube and secure with the clip.
  4. Confirm that there are no vacuum leaks and that the noise has been eliminated.

Sponsored Recommendations

Learn how electronic parking brake actuators have replaced manual systems and now play a key role in advanced safety features like automatic emergency braking. This WIYB Training...
Not all fuel injectors are created equal. In this WIYB Training Series, we compare Standard® Fuel Injectors against OE, low-cost imports. See why precision engineering and rigorous...
Carrying active OEM subscriptions for all manufacturers is not possible for many shops. However, access to this software is required for certain modern vehicles and repairs, and...
Learn how to properly lubricate your AIRCAT air tools to keep them running at peak performance. Discover essential daily maintenance and storage techniques, along with the right...

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!