KNOWN FAULTS · Toyota

Known faults for the Toyota Aygo (I).

2005–2014 · Petrol / Diesel

Sources are not verified in real time and no entry confirms that your car is affected.

2 known faults with sources

Engines: 1.0 VVT-i (Petrol)

Water pump and clutch on the 1.0 VVT-i (1KR-FE)Cooling

Engine / equipment: 1.0 VVT-i three-cylinder (1KR-FE): Toyota Aygo, Yaris and iQ, Peugeot 107 and Citroën C1
Period mentioned: Approx. 2005–2011
Symptoms: Coolant loss with coloured residue next to the pump and rising temperature; a clutch that slips or squeals and hard gear changes earlier than normal.
Possible cause described: In the early years the water pump often failed after about three years of use; it was improved in 2009. The original 180 mm clutch was short-lived; a larger one was fitted from 2009 (a 190 mm alternative exists). The German Yaris II guide also lists faulty water pumps on the 1.0.
Check for the garage: Look for dried coolant residue under the pump and watch the level. Test the clutch pulling away on a hill; if it is replaced, ask for the improved version.
Cost cited in the source: Approx. €300–550 for the water pump (German used-car guide).A rough figure from the original database, not an up-to-date quote.

Engines: 1.4 D-4D (Diesel)

Turbo, injectors and clutch on the Aygo 1.4 D-4DInjection / turbo

Engine / equipment: Toyota Aygo I 1.4 D-4D (PSA 1.4 HDi diesel engine)
Period mentioned: 2005–2010
Symptoms: Loss of power, smoke and turbo whistle; hard starting or rough idle from the injectors; a clutch that slips or is replaced more often than normal.
Possible cause described: The German guide says that, apart from the turbo and injectors, the diesel has no notable problems; it also mentions clutches that often need replacing on the Aygo I.
Check for the garage: Listen to the turbo and check its shaft for play or oil; run an injector back-leak test; test the clutch pulling away on a hill; check recalls by VIN (accelerator pedal 2/2005–8/2009).
Cost cited in the source: No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.