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Service bulletin L-TT-0282-20

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 id10173971
Published by NHTSA2020-04-20
Manufacturer's numberL-TT-0282-20
Manufacturer's date2020-03-19
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY

NHTSA's summary

TT: Some vehicles may continue to experience abnormal blend door noise when changing the HVAC temperature setting after the air conditioner radiator assembly (evaporator case) was replaced for the same condition.

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

Engine, Cooling system, Radiator

Vehicles listed
LEXUS GS 3502013 to 2020
LEXUS IS 2502014 to 2015
LEXUS IS 3002016 to 2020
LEXUS IS 3502014 to 2020
LEXUS IS200T2016 to 2017

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