Some 2016-2018 Toyota 4Runner vehicles equipped with the TRD Pro suspension kit may exhibit a tight clearance or contact condition between the LH rear shock absorber remote reservoir and the inner wheelhouse body panel. A knock or clunk noise may be heard from the LR over bumps. This condition was eliminated on later build dates via the use of a re-designed reservoir mounting bracket. The LR shock is P/N PTR13-89150-LR. The previous bracket/hardware kit is PTR13-35140-AB. The new updated kit is PTR13-35140-BA.
Check the shape of the reservoir bracket. If the bracket features an angled step, this bulletin does not apply. If the bracket does not feature this step:
Measure the smallest distance between the LR shock reservoir and the inner wheelhouse panel edge. If the clearance is less than 5mm, the bracket must be replaced. Lift the left rear corner of the vehicle to increase access. Wheel removal is not needed. Using a 5mm Allen socket, remove the No. 1 bolt. Using a 6mm Allen socket, remove the two remaining bolts. This will free the reservoir and bracket. Slide the bracket down slightly and remove the snap ring. Remove the bracket by sliding it off of the reservoir. Clean the reservoir end and inspect for damage. If the reservoir plating is damaged by contact with the body flange, remove and replace the left rear reservoir.
Install the new bracket, replace the snap ring. Reinstall the tighten bolt No. 1., then the remaining bolts. Conform that you now have 5mm or more or clearance. Test drive to confirm that the noise is gone.
