Service bulletin T-SB-0021-16

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10096962
Published by NHTSA	2017-04-06
Manufacturer's number	T-SB-0021-16
Manufacturer's date	2016-03-22
NHTSA component	WHEELS

NHTSA's summary

TSB: SOME 2014 – 2016 MODEL YEAR COROLLA VEHICLES MAY EXHIBIT REAR WHEEL HOUSE PLATES THAT APPEAR TO BE LOOSE OR HAVE A GAPPING CONDITION TO THE VEHICLE BODY. NEW PARTS HAVE BEEN MADE AVAILABLE TO PREVENT THIS FROM OCCURRING. PLEASE FOLLOW THE PROCEDURE IN THIS BULLETIN TO ADDRESS THIS CONDITION.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Wheels

Vehicles listed
TOYOTA COROLLA	2014, 2015, 2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
T-SB-0106-20 Rev	2022-12-19. Service bulletin. TSB: Some 2015 ? 2021 model year Corolla vehicles may exhibit a clicking noise when making turns greater than 90 degrees and accelerating with the steering wheel on full lock, such as when performing a U-turn. Follow the Repair Procedure in this bulletin to address this condition.
Toyota PRO19-02	2022-02-14. Service bulletin. POL: This consolidated Tire Warranty Guide contains the complete warranty terms for all brands of ground and spare tires currently in use by Toyota. This information must be kept near the point of vehicle sale and be available to any customer that requests it. Customers can find this information on the Owner?s section of Toyota.com. Dealers can locate a copy of this guide on the Claims Processing & Resource Center in Dealer Daily as well.
T-SB-0106-20	2020-11-30. Service bulletin. TSB: Some 2015 ? 2021 model year Corolla vehicles may exhibit a clicking noise when making turns greater than 90 degrees and accelerating with the steering wheel on full lock, such as when performing a U-turn. Follow the Repair Procedure in this bulletin to address this condition.
T-SB-0063-20	2020-08-03. Service bulletin. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin Nos. ST005-01, SU001-08, and T-SB-0391-08. The aforementioned bulletins are obsolete, and any printed versions should be discarded. Be sure to review the entire content of this service bulletin before proceeding. This Service Bulletin provides best practice procedures for vehicle pulling complaint, diagnosis, and repair for 2002 ? 2021 model year Toyota vehicles. This information supplements Repair Manual procedures when the symptoms are: ?Vehicle Pulling: The vehicle moves to the right or left when the driver holds the steering wheel while driving straight ahead without exerting steering effort. ?Steering Wheel Off Center: The vehicle travels straight, but the steering wheel is not pointed straight ahead. The vehicle is not pulling. Before repairing a vehicle pulling to one side, it is necessary to clearly identify the cause of the pulling condition. Frequently, pulling to one side is diagnosed as a wheel alignment concern. However, the actual cause may be related to the lateral force generated by the tires, vehicle damage, road crown or worn components. Performing a wheel alignment when tire force is the cause could result in the wheel alignment being set at a value outside of specifications. This could then cause other problems such as uneven tire wear, etc. A customer may notice a pull to the left when in the left lanes of travel and notice a pull to the right or no pull when traveling in the right lanes of travel on the very same section of roadway. This road crown effect is environmental and cannot be corrected with suspension adjustments or any other wheel or tire modification discussed in this bulletin.
T-SB-0021-16	2018-04-23. Service bulletin. TSB: Some 2014 ? 2016 model year Corolla vehicles may exhibit rear wheel house plates that appear to be loose or have a gapping condition to the vehicle body. New parts have been made available to prevent this from occurring. Please follow the procedure in this bulletin to address this condition.
T-TT-0424-16	2018-04-02. Service bulletin. TT: Front Brake Vibration Key Points: * Issue can occur at any time if improper torque is applied on lug nuts * Over time, even one lug nut over or under torqued, can cause a vibration issue * When lug nuts are over torqued, this causes the rotor to have a runout out condition which can lead to brake vibration concerns * Brake vibration issues can occur at parking lot to highway speeds * Brake vibration issues can occur at light to moderate braking * Tightening lug nuts in a star pattern method during the torqueing process will assure that even/equal pressure is applied across the rotor hub surface * Torque sticks/wrenches should be used to apply accurate torque values when tightening * Do Not use impact guns/ratchets to completely run lug nuts up to the wheel surface
T-TT-0277-13	2018-04-02. Service bulletin. VSC MIL ?ON? with DTC C1433. Steering angle value in ABS/TRAC ECU is -1044 degrees or 1044 degrees and does not change as steering wheel is turned.
T-SB-0026-14	2018-04-02. Service bulletin. During the manufacturing process tires are mounted on the vehicle as matched sets to help reduce conditions such as pulling or drifting. If the wheels are replaced or refinished before vehicle delivery, it is important that the tires remain on the vehicle in the same location and in the same direction of rotation.
T-SB-0026-14 Rev	2017-08-14. Service bulletin. TSB: During the manufacturing process tires are mounted on the vehicle as matched sets to help reduce conditions such as pulling or drifting. If the wheels are replaced or refinished before vehicle delivery, it is important that the tires remain on the vehicle in the same location and in the same direction of rotation. Please refer to the following procedure to ensure that the original tires stay in the same location on the vehicle.