Parts for your 2011 Toyota Hiace-Spark plugs

2011 Toyota HiAce spark plugs: petrol models use them, diesels don’t

Technical sources including Toyota service literature and parts catalogues for the 2011 HiAce range (covering the 2TR-FE 2.7-litre petrol and 1KD-FTV 3.0-litre diesel) make it clear that spark plugs are fitted only to the petrol variant. The 2TR-FE uses long-life iridium plugs (commonly Denso/NGK types such as SK20HR11/FK20HR11), while the 1KD-FTV diesel uses glow plugs and has no spark plugs at all. Toyota New Car Features and the engine repair manuals for these powertrains back this up: petrol equals spark ignition, diesel equals compression ignition.

Why the diesel doesn’t use spark plugs: the 1KD-FTV is a compression-ignition engine. It relies on very high compression to heat the air, and then injects diesel fuel which auto-ignites. Glow plugs are used only to aid cold starts