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Service bulletin L-TT-0254-18

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 id10173986
Published by NHTSA2020-04-20
Manufacturer's numberL-TT-0254-18
Manufacturer's date2020-03-26
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER

NHTSA's summary

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.

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

Equipment and accessories, Heating and air conditioning

Vehicles listed
LEXUS CT HYBRID2015 to 2018
LEXUS ES HYBRID2015 to 2020
LEXUS ES3502015 to 2020
LEXUS GS 200T2016 to 2017
LEXUS GS 3502015 to 2020
LEXUS GS F2016 to 2020
LEXUS GS HYBRID2016 to 2018
LEXUS GS3002018 to 2020
LEXUS GS450H2015
LEXUS GX4602015 to 2020
LEXUS IS 2502015
LEXUS IS 250C2015
LEXUS IS 3002016 to 2020
LEXUS IS 3502015 to 2020
LEXUS IS 350C2015
LEXUS IS200T2016 to 2017
LEXUS LC HYBRID2018 to 2020
LEXUS LC5002018 to 2020
LEXUS LS HYBRID2018 to 2020
LEXUS LS4602015 to 2017
LEXUS LS5002018 to 2020
LEXUS LS600H2015 to 2016
LEXUS LX5702015 to 2020
LEXUS NX HYBRID2015 to 2020
LEXUS NX200T2015 to 2017
LEXUS NX3002018 to 2020
LEXUS RC 200T2016 to 2017
LEXUS RC 3002016 to 2020
LEXUS RC 3502015 to 2020
LEXUS RC F2015 to 2020
LEXUS RX HYBRID2015 to 2020
LEXUS RX3502015 to 2020
LEXUS UX HYBRID2019 to 2020
LEXUS UX2002019 to 2020

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