Metallic Rattle Sound While Operating Horn – 2017-2021 Subaru WRX

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NHTSA ID Number: 10201798

Manufacturer Communication Number: 07-200-21


This bulletin announces the design changes to the right front wheel apron.


NUMBER: 07-200-21



This bulletin announces the design changes to the right front wheel apron. A customer may experience a “metallic rattle” sound when operating the horn. This can be the passenger side horn mount making contact with the wheel apron creating a vibration/sound. The new apron has an added indentation to providing needed clearance for the horn. There has also been a horn stopper removed from the apron to allow additional clearance as well.



  • Vehicles produced as of January 2020 will have the added indentation.
  • Vehicles produced as of August 2021 will have the added indentation and the deleted horn stopper.





On vehicles produced prior to these design changes, the rattle/noise can be repaired by applying pressure to the passenger side horn mount. Doing so will insure proper clearance between the horn mount and the wheel apron. This is performed by hand with the passenger front under cover removed.


STEP 1) Refer to the applicable Subaru Service Manual: Body & Electrical > EXTERIOR/INTERIOR TRIM > Front Under Cover.


STEP 2) Slightly reposition the left horn mount towards the front of the vehicle. Use CAUTION not to apply excessive force causing damage to the mount. Function test the horn to in after adjustments to confirm there is no rattle/vibration sound  during  operation.


STEP 3) Reinstall all parts in the reverse order of disassembly.


End of Procedure


5 Affected Products


SUBARU WRX 2017-2021


1 Associated Document

Manufacturer Communications

NUMBER: 07-200-21
DATE: 09/13/21

MC-10201798-0001.pdf 1268.495KB

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Last update on 2024-05-19 / Affiliate links / Images from Amazon Product Advertising API

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