Also known as: 1kr-fe, 1kr-vet, 1kr, kr engine, 1.0 three-cylinder toyota, aygo engine, 1kr-de, 1kr-b52
Toyota's one-litre three-cylinder — and PSA's, because it is the joint engine of the Aygo, 107/108 and C1 as well as the Yaris, iQ, Mira and Rocky.
That shared parentage is the reason to have this page. A fault documented on a Toyota describes a Peugeot 107 and a Citroën C1 exactly, and their owners are very unlikely to be reading anything Toyota-branded. Establish the engine rather than the badge before dismissing what you find.
It is chain-driven, port-injected and about as simple as a modern engine gets, and it has the reputation to match. What arrives with age is the chain and the water pump, and on high-mileage examples a rattle at start-up that settles with oil pressure is the chain tensioner rather than anything internal.
The 1KR-VET is turbocharged and the 1KR-FE is not — the Rocky and Raize carry the boosted version, and it is a materially harder-worked engine on the same architecture. Oil interval matters more there than the service book's number suggests.
Cars fitted with this engine
13 generations, across 3 makes. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.
Daihatsu
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Posted about this engine
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Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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