Parts for your 2021 Lexus Is-Fuel injectors

2021 Lexus IS fuel injectors — what they do and how to look after them

Based on Lexus technical literature (New Car Features manuals), Toyota’s D‑4S/D‑4ST fuel system documentation, and the 2021 Lexus IS owner’s handbook, every 2021 Lexus IS uses fuel injectors. Depending on variant and market, the IS 300 (8AR‑FTS 2.0‑litre turbo), IS 300h hybrid (2.5‑litre four‑cylinder), and IS 350 (2GR‑FKS 3.5‑litre V6) all run Toyota’s dual‑injection strategy: port injectors plus high‑pressure direct injectors. So fuel injectors are absolutely relevant on this model.

On the 2021 IS, fuel injectors precisely meter and atomise petrol so the engine gets the right amount of fuel at the right time. With the dual‑injection setup, the port injectors help with smooth running and reduced valve deposits, while the direct injectors handle high‑load efficiency and crisp response. It’s a smart combo that balances power, economy and emissions.

Injectors aren’t a scheduled replacement item, but they do benefit from the right care. Using quality petrol is the first step