Knocking -Type Sound from Engine Compartment – 2020 Subaru BRZts / Tuned by STI Model

NHTSA ID Number: 10174544

Manufacturer Communication Number: 05-74-20

Summary

This bulletin provides a service procedure to address a small number of customer concerns regarding a knocking type sound coming from the engine compartment when going over bumps at low speed.

 


NUMBER: 05-74-20
DATE: 04/30/20

APPLICABILITY:2020MY BRZts / Tuned by STI Model
SUBJECT:Knocking -Type Sound from Engine Compartment

 

INTRODUCTION:

This bulletin provides a service procedure to address a small number of customer concerns regarding a knocking -type sound coming from the engine compartment when going over bumps at low speed.  The sound is a result of foreign material trapped between the attachment surfaces of both stays and the toe board bracket and strut tower.  The stays are identified in the red call-outs below and the mounting points in green.

 

PART INFORMATION:

Description Part Number
FLANGE NUT M8902370062
FLANGE BOLT 8X25901000404

 

NOTE:  These flange nuts (3 per stay) and flange bolts (1 per stay) are all one-time use items and MUST be replaced once they have been removed.

 

SERVICE PROCEDURE / INFORMATION:

REMINDER:  Customer satisfaction and retention starts with performing quality repairs.

  1. Road test the vehicle to confirm the customer’s concern.
  2. If the condition is confirmed, remove the stays and road test again to determine if the condition still exists.
    • If the sound persists, the root cause is elsewhere. The strut mount(s) would be the next component to investigate.
    • If the sound is gone, proceed to 3).
  3. Remove both stays and discard the removed hardware.
  4. Thoroughly clean both the mounting surfaces of the stays and the corresponding mounting surfaces on the strut towers and toe board mounting bracket as shown below. Use a mild solvent on a clean shop cloth and allow to thoroughly dry before reassembly.
  5. Reassemble in reverse order using new hardware. Torque all of the new flange nuts and bolts to 16 Nm (11.8 ft. lbs.).
  6. Road test the vehicle again to confirm the repair.

 


1 Affected Product

Vehicle

MAKEMODELYEAR
SUBARUBRZ2020

 


1 Associated Document

Manufacturer Communications

NUMBER: 05-74-20
DATE: 04/30/20

MC-10174544-0001.pdf 1183.744KB

 


 

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