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Service bulletins for the 2020 Toyota Tundra

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.

159 on file from NHTSA, as of 2026-10-19.

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Bulletins, newest first
T-SB-0008-19_Rev2020-03-30. Service bulletin. EQUIPMENT. An initialization procedure is required to activate the Entune? 3.0 App Suite Connect for Audio, Audio Plus, and Premium Audio head units before they are used for the first time on new vehicles. The initialization procedure may also be performed under other circumstances, such as following a head unit replacement or after the customer?s personal settings are erased. The initialization procedure requires between 3 and 15 minutes to complete, depending on file size, cellular connection speed, and other factors. Connection to a wireless network is recommended for optimal functionality when downloading software via a smartphone. Download the latest Entune? 3.0 smartphone app on a smartphone. Following the initialization procedure, individual Entune? 3.0 apps may periodically update through an over-the-air update system. Updates are optional or mandatory. The update procedure will take approximately 1 minute for each app requiring an update. Follow the Initialization/Update Procedure in this bulletin to perform the initialization and app updates
T-TT-0594-202020-02-24. Service bulletin. EQUIPMENT. TT: Some vehicles equipped with Dynamic Navigation may experience a pop-up message notifying them that their map update service will end soon. The date that is shown could be more than one year in the future. This does not indicate any issues with the vehicle, and is only informing the user of the expiration date.
T-TT-0593-202020-02-24. Service bulletin. EQUIPMENT. TT: Some customers may experience the Remote Connect becoming inoperative when attempting to send commands to the vehicle. To simplify the diagnosis of this system and prevent the unnecessary replacement of parts, please refer to the procedure below.
T-TT-0588-192020-02-24. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. TT: Some 2020 model year vehicles may display abnormal Safety Connect operation during PDS due to DCM activation issues. This condition is characterized by no DTCs present and after the initial SOS light flashing sequence after ignition on, neither the red nor green light stays on in the overhead console. To determine if a vehicle is experiencing this condition, connect a Techstream and navigate to: Telematics-Data List - ?Telematics Activation Status?. If this value is displayed as ?Shipping?, continue to the recommendations below, and do not create a TAS case.
T-TT-0520-19_Rev2020-02-18. Service bulletin. EQUIPMENT. TT: In certain cases of leaking air conditioning systems, the root cause of the leak is inadvertently overlooked, causing a repeat repair. To improve customer satisfaction and repair A/C system leaks in one dealer visit, Toyota has developed a set of guidelines for evaluating A/C system components.
T-SB-0009-19_Rev2020-02-18. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE January 22, 2020 Rev1: ? The Battery subsection has been updated. Any previous printed versions of this bulletin should be discarded. Long-term or off-site storage requires special care to keep vehicles factory fresh and ready for delivery. The following guidelines should be performed to minimize vehicle component/part degradation due to extended vehicle storage conditions. Long-term storage can affect a vehicle?s systems and components. Any problems that are found should be corrected immediately.
T-SB-0161-19_Rev2020-02-18. Service bulletin. EQUIPMENT; PARKING BRAKE. TSB: REVISION NOTICE January 13, 2020 Rev1: ? Applicability has been updated to exclude 2020 model year Tacoma vehicles. ? The Introduction, Software Update Information, and Software Update Procedure sections have been updated. Any previous printed versions of this bulletin should be discarded. Some 2020 model year vehicles equipped with Audio Plus (version 1021) or Premium Audio (version 1021) or earlier may exhibit one or more of the following conditions: ? Barge in function defaulted to ?OFF? ? Limited phone book grammar ? Difficult Hand Free operation ? Abnormal Electronic Owner?s Manual operation ? Music doesn?t automatically resume when using Android Auto ? Cover art isn?t displayed ? Vehicle position isn?t sent to Destination Assist server ? System inoperative after using the return button when using voice recognition Some 2020 model year vehicles equipped with Audio Plus (version 1035) or Premium Audio (version 1035) or earlier may exhibit one or both of the following conditions: ? Abnormal screen play while using Apple CarPlay® (primarily during phone calls) ? Poor sound quality during phone calls while using Apple CarPlay® A software update is now available to address these conditions. Follow the Software Update Procedure in this bulletin to update the software.
T-TT-0593-20_Rev2020-02-18. Service bulletin. ELECTRICAL SYSTEM. TT: Some customers may experience the inability to activate Remote Connect or Remote Connect becoming inoperative when attempting to send commands to the vehicle. To simplify the diagnosis of this system and prevent the unnecessary replacement of parts, please refer to the procedure below.
T-SB-0008-202020-02-18. Service bulletin. EQUIPMENT. TSB: Vehicles may display evidence of a fluid leak or fluid seep from powertrain components. This bulletin explains how to determine the differences between a fluid leak versus a fluid seep. Cases that are determined to be a ?leak? should be repaired accordingly and will be covered under warranty if applicable. Cases that are determined to be a ?seep? should be documented on the repair order and inspected at the next service interval. Follow the Repair Information in this bulletin to determine if the concern in question is a fluid leak or fluid seep and review the Repair Procedure section to address the condition. NOTE This bulletin applies to ALL powertrain fluids excluding fuel and coolant.
T-SB-0007-19_Rev2020-02-18. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE January 24, 2020 Rev1: ? The entire bulletin has been updated. Any previous printed versions of this bulletin should be discarded. A battery in a stored vehicle is subject to conditions that can reduce its performance and service life. These conditions include storage period, temperature, parasitic drain, and battery load. Because of these factors, battery inspection and maintenance are required in order to ensure proper operation and optimal battery life. As a matter of policy, Toyota does not provide battery warranty coverage for discharged and/or failed batteries due to lack of maintenance. It is the dealer?s responsibility to maintain the specified State-Of-Charge (SOC) of the vehicle?s battery while in stock and ensure proper SOC at delivery. To eliminate customer service concerns due to an undercharged battery during the first few weeks of ownership, ALL dealers should check battery SOC and recharge, if necessary, no more than 48 hours before to customer delivery.
T-TT-0589-192020-01-27. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. TT: Customers may complain of a whine noise upon starter engagement. ? The whine noise may be accentuated when holding the key to start the engine; Alternately, the noise may be diminished by using the crank hold function ?bumping? the key to start the engine. ? The whine noise is likely to be loudest at the first cold start, diminishing with subsequent starts.
T-TT-0588-192020-01-27. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM. TT: Some 2020 model year vehicles may display abnormal Safety Connect operation during PDS due to DCM activation issues. This condition is characterized by no DTCs present and after the initial SOS light flashing sequence after ignition on, neither the red nor green light stays on in the overhead console. To determine if a vehicle is experiencing this condition, connect a Techstream and navigate to: Telematics-Data List - ?Telematics Activation Status?. If this value is displayed as ?Shipping?, continue to the recommendations below, and do not create a TAS case.
T-SB-0047-19_Rev2020-01-13. Service bulletin. EQUIPMENT. TSB: REVISION NOTICE December 13, 2019 Rev1: ? Applicability has been updated to include several 2020 model year Toyota vehicles. ? The Required Tools & Equipment section has been updated. Any previous printed versions of this bulletin should be discarded. Some 2018 ? 2020 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software. The SST is used with applicable vehicles to deliver the update; however, the process for generating license keys differs from previous generations. Before attempting to perform a map update, the head unit?s expiration date must be checked. If the expiration date is still valid, a license key may be generated without the use of an activation card number. Updating the maps without the use of an activation card number is considered an Embedded Navigation Update (refer to pg. 9) and performing this process does not extend the duration of telematic map services. If the head unit?s expiration date is expired, or is expiring within the next 90 days, it should be recommended to the customer to purchase an activation number. Utilizing an activation number will initiate a Dynamic Navigation Update (refer to pg. 3). This Dynamic Navigation Update will perform the Embedded Navigation Update and provide telematic map services for a period of two years from the day that the Dynamic Navigation Update is performed. Activation card numbers are provided in an activation card number pamphlet available through the normal parts ordering system. Follow the process in this bulletin to perform the update.
T-SB-0161-192019-12-16. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. TSB: Some 2020 model year vehicles equipped with Audio Plus (version 1021) or Premium Audio (version 1021) or earlier may exhibit one or more of the following conditions: ? Barge in function defaulted to ?OFF? ? Limited phone book grammar ? Difficult Hand Free operation ? Abnormal Electronic Owner?s Manual operation ? Music doesn?t automatically resume when using Android Auto ? Cover art isn?t displayed ?Vehicle position isn?t sent to Destination Assist server ? System inoperative after using the return button when using voice recognition A software update is now available to address these conditions. Follow the Software Update Procedure in this bulletin to update the software.
T-SB-0144-19_Rev2019-12-16. Service bulletin. STRUCTURE:BODY. TSB: REVISION NOTICE November 05, 2019 Rev1: ? The Warranty Information section has been updated. Any previous printed versions of this bulletin should be discarded. Some 2007 ? 2020 model year Tundra vehicles may exhibit surface corrosion and/or perforation corrosion on the back of the cab near the lower corner(s) of the center stop lamp assembly. Follow the Repair Procedure in this bulletin to address this condition.
T-TT-0442-17_Rev2019-12-16. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TT: Safety Connect is a vehicle option which requires a subscription fee for the system to be active after the initial trial period. Once the subscription has expired the DCM (Telematics Transceiver) will be in an inactive state. In some instances, a DCM may need to be replaced even though the customer is not using the service. If registration of the replacement DCM part is attempted using the Techstream utility after the account has become inactive, the registration will fail, and messages such as ?ATX webserver is Down? or ?ATX error? will be displayed.
T-TT-0578-192019-12-02. Service bulletin. STEERING. TT: Some customers may encounter Bluetooth® connectivity concerns such as: ? Difficulty to pair the phone. ? Intermittent Bluetooth® failure to connect to the vehicle when first turning on the vehicle. ? Various Bluetooth® Audio functions are no longer functioning with customer?s phone such as ability to change the track using the steering wheel controls. These concerns can be caused by changes made on the customer?s phone. Make sure to inquire with the customer if the connectivity concerns occurred after receiving an operating system update on their phone, or if they have restored their phone data/settings recently.
T-SB-0146-192019-12-02. Service bulletin. ELECTRICAL SYSTEM. TSB: Some 2020 model year Tundra vehicles equipped with Entune? 3.0 Audio Plus (version 1186) or earlier may exhibit one or more of the following conditions: ? WiFi intermittently inoperative ? DTC B15DB present ? Changing the Auto Relock Timer setting also changes the Remote 2-Press unlock setting A software update is now available to address these conditions. Follow the Software Update Procedure in this bulletin to update the software.
T-SB-0144-192019-12-02. Service bulletin. STRUCTURE. TSB: Some 2007 ? 2020 model year Tundra vehicles may exhibit surface corrosion and/or perforation corrosion on the back of the cab near the lower corner(s) of the center stop lamp assembly. Follow the Repair Procedure in this bulletin to address this condition
T-SB-0150-192019-11-18. Service bulletin. STRUCTURE. TBS: Some 2007 ? 2020 model year Tundra (Crew Max) vehicles may exhibit a rust or perforation condition on the vehicle?s body behind the back window moulding. Follow the Repair Procedure in this bulletin to address this condition.
T-TT-0575-192019-10-15. Service bulletin. EQUIPMENT. TT: Some new vehicles may experience the SOS/Telematics functions inoperative during Pre-Delivery Inspection or after replacement. The following procedure outlines the process to activate the DCM with the cellular network. To begin the process below, move the vehicle to an area with cell reception.
T-TT-0573-192019-10-15. Service bulletin. ELECTRICAL SYSTEM. TT: Some customers may experience a call failure when attempting to call a conference call number that has been saved in their phonebook (ex: ?8005550122,,,1.,2;;;2#?). This issue is caused by changes to the Bluetooth in the iOS 13 update and may be resolved in a future iOS update.
T-TT-0571-192019-10-15. Service bulletin. ELECTRICAL SYSTEM. TT: Some 2020 model year Tundra and Sequoia vehicles may experience a B15DB or intermittent Wi-Fi inoperative (Wi-Fi icon greyed out). To simplify the diagnosis of the inoperative Wi-Fi, refer to the procedure below to prevent unnecessary parts replacement.
T-SB-0095-19_Rev2019-10-15. Service bulletin. EQUIPMENT. TSB: Pre-Delivery Service (PDS) is a critical step in satisfying our new car customers. Customer feedback indicates the following areas deserve special attention when performing PDS: ? Careful inspection for paint chips/scratches and body dents/dings. ? Proper operation of electrical accessories. ? Interior cleanliness. ? Proper function of mechanical systems. Customer retention and proper maintenance of vehicles are and have always been a major focus for Toyota. To help remind customers that regular service is essential to the proper maintenance of the vehicle, dealers are required to install a service reminder sticker before delivery. By doing this, customers will be reminded to return to your dealership for service. Your current service reminder sticker may be used. (See PDS Check Sheet item 9 of ?Final Inspection and Cleaning.?) A new PDS Check Sheet has been developed for the 2020 model year Tundra. Some check points have been added, expanded, or clarified. Bulletins are available for items in bold type.
T-TT-0570-192019-09-16. Service bulletin. STRUCTURE. TT: Some 2014-2020 Tundra vehicles with a TRD skid plate may exhibit a ?creaking? or ?crackling? noise coming from the lower front end. The source of this noise has been pinpointed in several cases to the TRD skid plate contacting the frame crossmember.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.