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Service bulletin L-TT-0221-17_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 id10159696
Published by NHTSA2019-05-13
Manufacturer's numberL-TT-0221-17_Rev
Manufacturer's date2019-04-04
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; STEERING: STEERING WHEEL/HANDLE BAR

NHTSA's summary

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.

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

Electrical system, Steering, Software, Steering column and wheel

Vehicles listed
LEXUS CT HYBRID2011 to 2019
LEXUS ES 3502007
LEXUS ES 3502014
LEXUS GS 200T2016 to 2017
LEXUS GS 3502007 to 2011
LEXUS GS 3502013 to 2019
LEXUS GS F2016 to 2019
LEXUS GS HYBRID2007 to 2011
LEXUS GS HYBRID2014 to 2015
LEXUS HS 250 HYBRID2010 to 2012
LEXUS IS 2502006 to 2017
LEXUS IS 250C2010 to 2015
LEXUS IS 3502006 to 2019
LEXUS IS 350C2010 to 2015
LEXUS IS F2008 to 2014
LEXUS LFA2012
LEXUS LS 4602007
LEXUS LS 4602011
LEXUS LS HYBRID2018 to 2020
LEXUS LX2009, 2010
LEXUS LX 5702008
LEXUS LX 5702011
LEXUS NX2015, 2016
LEXUS RC 200T2015 to 2017
LEXUS RC 3002016 to 2019
LEXUS RC 3502015 to 2019
LEXUS RC F2015 to 2019
LEXUS RX2010, 2011
LEXUS RX 3502013
LEXUS RX 3512014

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
LSB002514A2021-12-20. Service bulletin. Immobilizer and Smart Key Reset
LSB0025142021-12-20. Service bulletin. Immobilizer and Smart Key Reset.
KLG_19LE05-TI-Up2020-09-14. Service bulletin. TI: TECHNICAL INSTRUCTIONS FOR LIMITED SERVICE CAMPAIGN KLG CUSTOMER SUPPORT PROGRAM 19LE05 SAFETY CONNECT SYSTEM ? VEHICLE LOCATION INACCURATE
KLG_19LE05-TI-Up2020-09-14. Service bulletin. TI: TECHNICAL INSTRUCTIONS FOR LIMITED SERVICE CAMPAIGN KLG CUSTOMER SUPPORT PROGRAM 19LE05 SAFETY CONNECT SYSTEM ? VEHICLE LOCATION INACCURATE
19LE05 - Dealer2020-01-27. Service bulletin. Dealer Package: December 10, 2019 Vehicle total has decreased by approximately 6,260 vehicles. Vehicles were moved from Customer Support Program 19LE05 and added to Limited Service Campaign KLG.
L-SB-0084-15_Rev2018-06-18. Service bulletin. TSB: REVISION NOTICE May 08, 2018 Rev1: * Applicability has been updated to include 2017 - 2018 model year vehicles. * The Introduction and Download/Installation Procedure sections have been updated. Any previous printed versions of this bulletin should be discarded. A download and installation are required to activate the Enform suite of apps and data services before they are used for the first time on new vehicles. The download and installation process may also be performed under other circumstances such as following a head unit replacement or after the customer's personal settings are erased. The download and installation process requires between 3 and 15 minutes to complete, depending on file size, cellular connection speed, and other factors. Following the download and installation procedure, individual Enform apps may periodically update through an over-the-air update system. Follow the procedure in this bulletin to perform the download/installation procedure and app updates.
L-TT-0172-152018-04-23. Service bulletin. TT: Techstream Health Check Results screen shows "Yes" for a Telematics ECU (DCM) Calibration update regardless of whether a calibration update is available or not. The issue is related to the Techstream software and will be corrected in a future Techstream software release.
L-SB-0015-10 Rev2018-04-23. Service bulletin. Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Techstream ECU flash reprograming process and outlines use of the TIS and the CUW.
L-SB-0083-13 Rev2018-04-02. Service bulletin. TSB: OBSOLETE NOTICE October 5, 2016: This bulletin is now obsolete. Please see L-SB-0086-16.
L-SB-0021-142018-04-02. Service bulletin. TSB: Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Techstream ECU flash reprogramming process and outlines use of the Technical Information System (TIS) and the Calibration Update Wizard (CUW). Flash calibration updates can only be applied to the vehicle/ECU combination for which they are intended. ECUs have internal security that will not allow them to be programmed with another ECU?s information.