Toyota Aygo 1.0 VVT-i AB10

The MultiMode Transmission (MMT) is an automated manual gearbox that uses an electronic actuator to operate the clutch and select gears. This actuator is prone to premature wear, typically between 60,000 and 120,000 km. Symptoms include jerky gear changes, failure to engage gears, sudden shifts to neutral while driving, and a flashing N warning light on the dashboard. A dealer replacement costs over €800-1,500 including labour, but specialist remanufactured units are available for €400-600 fitted. This issue ONLY affects cars with the semi-automatic MMT gearbox. Manual 5-speed cars do not have this problem at all.

The original Aygo clutch uses a 180mm disc that is small for the application and wears faster than expected, particularly in heavy city traffic. Toyota addressed this with an upgraded 190mm clutch kit (borrowed from the Yaris) which significantly extends clutch life. Corrosion on the clutch mechanism can also accelerate wear. If replacing the clutch, always request the 190mm upgrade kit. Replacement costs €400-800 at an independent garage depending on whether the flywheel also needs machining or replacement.

The 1KR-FE engine uses a timing chain rather than a belt, which should theoretically last the life of the engine. However, chain stretch has been reported around the 100,000-150,000 km mark, particularly on cars where oil changes were neglected or where cheap oil was used. The first symptom is a brief rattle on cold start lasting a few seconds. If ignored, the chain can skip teeth, causing valve-to-piston contact and catastrophic engine damage. Replacement involves a chain kit with tensioner and guides, costing €600-1,200 depending on the workshop. Regular oil changes with quality 0W-20 or 5W-30 oil significantly reduce the risk.

The Aygo's exhaust system is known to corrode faster than average. The rear silencer typically fails first, producing a growling or rattling noise from underneath the car. Cars driven in areas with road salt or coastal environments are particularly affected. A replacement rear silencer costs around €80-150 for aftermarket parts plus €100-200 for fitting. If the entire exhaust from the catalytic converter back needs replacing, expect €300-500 at an independent garage. This is a common MOT/TUV failure point.

The lambda (oxygen) sensor typically degrades between 80,000 and 130,000 km. Symptoms include the check engine light, increased fuel consumption of up to 15%, and rough idling. Some owners have reported premature failures at lower mileages. The part costs around €50-100 for aftermarket or €100-150 for OEM, with labour of approximately €50-100. This is a straightforward repair that most independent garages can handle quickly.

A well-documented issue on the AB10 Aygo. Water leaks into the boot area through deteriorated tailgate seals, rear light cluster gaskets, or the high-level brake light seal. Water can also enter the front footwells through a faulty cabin vent seal. If left unaddressed, standing water can damage the wiring loom under the carpets. New seal kits cost €20-50, and the repair is straightforward with silicone sealant and replacement rubber seals. Check for damp carpets and a musty smell during inspection.

Some Aygo owners report that the starter motor wears out earlier than expected, particularly in cold weather. The symptom is slow or reluctant cranking that gets worse in winter. A replacement starter motor costs around €80-150 for the part, with €100-200 for labour. The starter motor is reasonably accessible on the 1KR-FE engine, making it a relatively quick job.