If you are considering buying a used Toyota Aygo, there are several major reliability issues worth knowing about first. Our garage database tracks 8 known faults for this model, 1 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.
Are you about to buy a lemon?
Sellers rarely admit these faults outright. Our database tracks 23 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any Toyota Aygo advert and we will check it in seconds.
Premature clutch wear (20k miles) and severe water ingress into the boot and footwells
Rough guide
£300-500
Typical symptoms
clutch slipping heavily under acceleration
high biting point on clutch pedal
damp smell in cabin, water pooled in spare wheel well
Affected vehicles
Engines:
1.0 VVT-i
Typical mileage:
20000-60000 miles
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Toyota Aygo Mk1 (2005-2014) (2005-2014) problems
Engine/EmissionsMedium severity📝 Editorial
Premature water pump failure, commonly occurring at around three years old or 19,000 miles, leading to coolant leaks and potential overheating if not addressed.
Rough guide
£250-350
Typical symptoms
Coolant leaks visible under the car
Engine temperature gauge rising
Low coolant warning light
Whining noise from the engine bay
Affected vehicles
Engines:
1.0 VVT-i Petrol
Typical mileage:
15000-30000 miles
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OtherMedium severity📝 Editorial
Water ingress into the boot and rear footwells, often via extractor vents, misfitted rear door/hatch seals, rear light seals, or pop-out rear windows on 5-door models. This can lead to damp carpets, mould, and electrical issues.
Rough guide
£200-600
Typical symptoms
Damp carpets in the boot or rear footwells
Mouldy smell inside the car
Condensation on interior windows
Water visible in the spare wheel well
Affected vehicles
Engines:
All variants
Typical mileage:
30000-80000 miles
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Transmission/ClutchHigh severity📝 Editorial
The MMT (Multi-Mode Transmission) automated manual gearbox is prone to various failures, including jerky operation, slipping clutch, actuator failure, and complete loss of drive. Repairs are very expensive, often leading to the car being an economic write-off.
Rough guide
£1500-2500
Typical symptoms
Jerking or shaking during gear changes
Clutch slipping, especially under acceleration
Intermittent 'beeping' sounds from the gearbox
Loss of gear selection display or complete loss of drive
Affected vehicles
Engines:
MMT Automated Manual Transmission
Typical mileage:
50000-90000 miles
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ElectricalMedium severity📝 Editorial
Reports of electric power steering failures occurring at 3-4 years old, requiring replacement of the power steering motor. While some failures may be user-induced (holding on full lock), it is a known expensive fault.
Rough guide
£650-800
Typical symptoms
Heavy steering, especially at low speeds
Intermittent loss of power assistance
Power steering warning light on dashboard
Affected vehicles
Engines:
Electric Power Steering (EPS) system
Typical mileage:
30000-60000 miles
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OtherMedium severity📝 Editorial
On 5-door models, the glue holding the rear pop-out windows to their hinges can fail, causing the windows to detach or fall out. This was subject to a recall in January 2019.
Rough guide
£200-400
Typical symptoms
Rear pop-out window feels loose or detached
Window falls out when opened or during driving
Increased wind noise from the rear
Affected vehicles
Engines:
5-door models
Typical mileage:
50000-100000 miles
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Engine/EmissionsMedium severity📝 Editorial
The 1.0 VVT-i petrol engine can develop excessive oil consumption, often attributed to failing valve stem oil seals. This can lead to the oil warning light flashing during cornering and requires frequent oil top-ups.
Rough guide
£500-800
Typical symptoms
Frequent need to top up engine oil
Oil warning light flashing, especially during cornering
Difficulty getting an accurate dipstick reading
No visible smoke from the exhaust on startup
Affected vehicles
Engines:
1.0 VVT-i Petrol
Typical mileage:
70000-100000 miles
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Toyota Aygo Mk2 (2005-2011) (2005-2011) problems
Engine/EmissionsMedium severity💬 Owner reports
Water pump failures are common on the 1.0 3-cylinder engine, typically occurring around 3 years of age. This is also a known issue on other models sharing this engine (Citroen C1, Peugeot 107, Toyota Aygo).
Rough guide
£300-500
Typical symptoms
Growling noise from the engine bay
Engine overheating
Coolant leaks
Low coolant level
Affected vehicles
Engines:
1.0 3-cylinder engine
Typical mileage:
30000-60000 miles
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Toyota Aygo service intervals: cambelt, chain and gearbox oil
An overdue cambelt is the most expensive thing a seller can fail to mention on a used Aygo. These are the figures UK specialists work to.
Timing chainChain
1KR-FE, 1.0 VVT-I
No fixed replacement interval
Chain driven with no scheduled replacement. The weak point is the oil-fed tensioner: skipped oil changes sludge its feed orifice and the chain then rattles and stretches. Stretched chains are documented as early as 45,000 miles on neglected cars, with a repair around GBP 580 including the water pump. A cold-start rattle that persists needs immediate investigation.
Always confirm against the vehicle handbook. Intervals vary by engine, and several manufacturers revised theirs after failures in service.
Repair costs are typical UK ranges, not quotes. Actual cost depends on condition and garage.Data last verified: September 2026
Where this Toyota Aygo fault data comes from
If you used to check the Honest John “Good & Bad” section before the site closed in 2026, this page is where that information now lives. We rebuilt the Toyota Aygo owner-report history from the archived Honest John dataset, added our own research, specialist and owner-club sources and DVSA recall data, and we keep it free. Each fault above is badged with its source. The same data feeds our free advert check, which reads a listing against every known fault for the exact engine and year.
Knowing what a Toyota Aygo goes wrong with is half of it. The rest is reading the advert and checking the car's history before you hand any money over.