Parts for your 2007 Toyota Highlander-Spark plugs

2007 Toyota Highlander (Kluger): Spark Plugs, Purpose and Servicing Advice

Yes, the 2007 Toyota Highlander (known as Kluger in Australia and New Zealand) uses spark plugs. This is confirmed by Toyota’s 2007 Highlander Repair Manual and Scheduled Maintenance Guide, and by Denso and NGK catalogues for the 2.4‑litre 2AZ‑FE and 3.3‑litre 3MZ‑FE petrol engines. Both engines use coil‑on‑plug ignition with long‑life iridium plugs.

Spark plugs do the crucial job of igniting the air–fuel mix in each cylinder. With a strong, consistent spark, the Highlander starts crisply, runs smoothly, sips less petrol, and keeps emissions in check. On these engines, Toyota specifies iridium plugs because they hold their sharp edge and stable gap for far longer than copper types, which is why the service interval is extended.

For most 2007 Highlanders/Klugers, the correct plugs are iridium, gapped to about 1.1 mm, with OEM‑equivalent Denso or NGK part numbers depending on engine variant. Always match by engine code and confirm in the owner’s manual or dealer parts system. Typical tightening torque is around 18 N·m