Lexus introduced Apple CarPlay to the IS series starting with the 2021 model year. This information is confirmed by a discussion on Reddit where a user mentions that their 2021 Lexus IS has CarPlay functionality, indicating that it was the first year of support for this feature in the IS lineup.

Additionally, more context about Lexus and Apple CarPlay can be found in other sources. Apple CarPlay was first introduced in general automotive use in 2014, but it was not until 2018 that Lexus began equipping its vehicles with this technology. The announcement for Apple CarPlay compatibility in select Lexus vehicles specifically highlighted that it would start with the 2019 model year, although it appears the IS series saw a later introduction.

For further details, you can access the sources:

1. Reddit Discussion on Lexus IS and CarPlay
2. Mozart Electronics breakdown of Apple CarPlay introduction in Lexus
3. Announcement of Apple CarPlay coming to Lexus vehicles

Sources

r/Lexus - What year did the IS models start having car play ... - RedditApple CarPlay for Lexus - Breakdown by Models - Mozart ElectronicsLEXUS IS Models/Series Timeline, Specifications & PhotosLexus IS - Wikipedia2025 LEXUS IS: A SILVER ANNIVERSARY WITH FLAREiOS - CarPlay - Available Models - AppleApple CarPlay Coming to Select Lexus Vehicles This Year

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