Parts for your 2003 Toyota Avensis-Spark plugs

2003 Toyota Avensis spark plugs — what’s used and how to look after them

For a 2003 Toyota Avensis, spark plugs are fitted to the petrol engines (3ZZ‑FE 1.6, 1ZZ‑FE 1.8 and 1AZ‑FSE 2.0 D‑4 petrol) and are not used on the diesel (1CD‑FTV 2.0 D‑4D). This is confirmed by Toyota Service Information (TIS) engine mechanical sections for the above petrol engines, which include spark plug inspection and replacement procedures, and by the Toyota/ADF repair literature for the 1CD‑FTV, which specifies glow plugs only. The Haynes Toyota Avensis (1998–2008) manual and Autodata service schedules echo this split, while NGK and Denso catalogues list spark plugs for the petrol variants and glow plugs for the diesel. So, spark plugs are relevant if the vehicle is petrol