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Service bulletin T-TT-0659-21 Rev

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)
TypeService bulletin
NHTSA id10201352
Published by NHTSA2021-09-13
Manufacturer's numberT-TT-0659-21 Rev
Manufacturer's date2021-07-06
NHTSA componentPOWER TRAIN

NHTSA's summary

TT: Some 2014-2021 model year vehicles equipped with Dynamic Torque Control AWD system may experience a ?Noise? or ?Abnormal Operation? condition from the rear differential front coupling. In some cases, even an ?AWD System Message? with or without a DTC may be present with or without other conditions present.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
TOYOTA AVALON2021
TOYOTA CAMRY2020, 2021
TOYOTA HIGHLANDER2016, 2017, 2018, 2019, 2020, 2021
TOYOTA RAV42015, 2016, 2017, 2018, 2019, 2020, 2021
TOYOTA SIENNA2014, 2015, 2016, 2017, 2018, 2019, 2020

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

Recalls for the same vehicles and component
20230352023-02-02. Powertrain
20201112020-03-19. Powertrain
14V4140002014-07-08. POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL)

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
20TE032023-07-31. Service bulletin. DP: This Customer Support Program provides coverage for a condition involving the front transfer case electro-magnetic clutch in certain 2019 ? 2020 model year RAV4 Adventure and Limited grade AWD vehicles. An abnormal buzz or groan noise from that case can occur with Normal drive mode selected during disconnect/connect timing of the AWD system. This condition typically occurs between 20 and 30 mph when accelerating from a stop, and/or between 20 and 13 mph on deceleration after driving the vehicle for 15 minutes or longer. Although the front transfer case electro-magnetic clutch is covered by Toyota?s New Vehicle Limited Warranty for 5 years or 60,000 miles (whichever comes first), we at Toyota care about the customers? ownership experience. Toyota is providing coverage for repairs related to abnormal buzz/groan noise from the front transfer case.
TSB0058222023-05-01. Service bulletin. TSB: Some 2019 ? 2022 model year RAV4 vehicles may exhibit a MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs) present: ?P0087/P008700 ? Fuel Rail/System Pressure ? Too Low ?P107A2A ? Fuel Rail Pressure Sensor (Low) Signal Stuck in Range This condition may occur when the vehicle is operated at high altitudes and temperatures, typically above 3,300 feet (1,000 meters) and at ambient temperatures above 85°F (30°C). The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) and the fuel suction tube assembly have been improved to reduce the possibility of this condition. Follow the Repair Procedure in this bulletin to address this condition.
TTT0715222023-05-01. Service bulletin. TT: Some 2019- 2023 RAV4 HV vehicles may duplicate an abnormal noise (Growl, Humming and/or other) from the Hybrid T/A and/or MGR at various vehicle speeds and normal drive conditions
TSB002222Rev12022-10-17. Service bulletin. TSB: Some 2019 ? 2020 model year RAV4 Adventure and Limited grade AWD vehicles may exhibit an abnormal noise from the vehicle?s AWD Dynamic Torque Vectoring Disconnect system from either the transfer assembly or rear differential carrier assembly when accelerating from a stop and/or on deceleration after driving the vehicle for 15 minutes or more. This condition occurs with ?Normal? drive mode selected during disconnect/connect timing of the AWD system
TSB0058222022-09-15. Service bulletin. This condition may occur when the vehicle is operated at high altitude and high temperatures; typically, above 3,300 feet (1,000 meters) and at ambient temperatures above 85°F (30°C). The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) and fuel suction tube assembly have been improved to reduce the possibility of this condition. Follow the Repair Procedure in this bulletin to address this condition
TSB002222Rev12022-09-15. Service bulletin. TSB: Some 2019 ? 2020 model year RAV4 Adventure and Limited grade AWD vehicles may exhibit an abnormal noise from the vehicle?s AWD Dynamic Torque Vectoring Disconnect system from either the transfer assembly or rear differential carrier assembly when accelerating from a stop and/or on deceleration after driving the vehicle for 15 minutes or more. This condition occurs with ?Normal? drive mode selected during disconnect/connect timing of the AWD system
TSB0022222022-06-21. Service bulletin. TSB: Some 2019 ? 2020 model year RAV4 Adventure and Limited grade AWD vehicles may exhibit an abnormal noise from the vehicle?s AWD Dynamic Torque Vectoring Disconnect system from either the transfer assembly or rear differential carrier assembly when accelerating from a stop and/or on deceleration after driving the vehicle for 15 minutes or more. This condition occurs with ?Normal? drive mode selected during disconnect/connect timing of the AWD system.
T-TT-0668-212021-11-15. Service bulletin. TT: Some vehicles may exhibit seat memory switch function inoperative condition if the Seating Position Control ECU is not initialized. The Pre-Delivery Service (PDS) bulletin (link below) instructs technicians to perform this initialization after the D/C Cut Fuse is installed. The Repair Manual (links below) states that when any of the following conditions are met, the seat position information in the position control ECU assembly will be cleared: ?The power switch is turned off with any of the seat switches being operated and the ECU-DCC NO.2 fuse removed. ?The power switch is turned off within 1 second of any of the seat switches being operated with the ECU-DCC NO.2 fuse removed. ?Power supplied to the position control ECU assembly is cut while the seat is moving to the memorized position.
T-SB-0065-21 Rev2021-10-25. Service bulletin. TSB: Some 2019 ? 2020 model year RAV4 Adventure and Limited grade AWD vehicles may exhibit an abnormal buzz/groan noise from the front transfer case at 20 ? 30 mph when accelerating from a stop and/or at 20 ? 13 mph on deceleration after driving the vehicle for 15 ? 20 minutes or more. This condition occurs with Normal drive mode selected during disconnect/connect timing of the AWD system. Follow the procedures in this bulletin to address this condition.
T-TT-0652-21 Rev2021-06-21. Service bulletin. TT: This Tech Tip applies to 2019 model year RAV4 Adventure/Limited grade equipped with torque vectoring AWD system ONLY. Some customers may experience an abnormal noise from rear differential after driving the vehicle for 15-20 minutes or more. This condition occurs with ?Normal? drive mode selected.