Home / Common Problems / Toyota Aygo

Toyota Aygo Problems & Known Issues

The most common Toyota Aygo problems ranked by severity — what to watch for, what it costs to fix, and what happens if you ignore it.

Generations

XP10 — First Generation
2005–2014
1.0 VVT-i, 1.4 D-4D
XP20 — Second Generation
2014–2022
1.0 VVT-i

Top issues to watch for

The most serious Toyota Aygo problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.

Dangerous
Structural corrosion affecting steering and braking safety
XP10, XP202005–202260k–120k miles
MOT data shows Aygos fail structural integrity tests at 8.5 times the national fleet average, specifically for corrosion that affects steering or braking systems. This typically manifests as corrosion around subframe mounting points, suspension turrets, or brake line mounting areas. The lightweight construction and thin metal sections used in city cars make them particularly vulnerable to structural corrosion that can compromise vehicle safety.
What happens if ignoredIf structural corrosion affects steering or braking systems, the vehicle becomes unsafe to drive and will fail MOT until repaired. Welding repairs can cost £300-800 depending on extent, but severe cases may be beyond economical repair for a city car of this value.
Independent garage
£300–£800
Specialist
£400–£1,000
Main dealer
£600–£1,500
Parts only
£50–£150
Major
Suspension component excessive wear and corrosion
XP10, XP202005–202240k–150k miles
MOT data shows Aygos fail suspension component tests at rates up to 32 times the national average, particularly for worn bushes, joints, and corroded components. The diesel variants show the highest failure rates, peaking at 60,000-80,000 miles. This affects both wear items like anti-roll bar links and structural components like wishbone bushes.
What happens if ignoredWorn suspension components affect handling, braking stability, and tyre wear. While not immediately dangerous, they will cause MOT failure and compromise road safety if left unrepaired. Individual components cost £50-150 but multiple items often need replacement simultaneously.
Independent garage
£150–£400
Specialist
£180–£500
Main dealer
£250–£700
Parts only
£80–£200
Major
Excessive blue or black smoke emission (XP10/XP20)
XP10, XP202005–202260k–150k miles
MOT data shows petrol Aygos fail smoke emission tests at 15.8 times the national average, particularly on higher mileage examples. Dense blue smoke indicates oil burning through worn piston rings or valve stem seals, while black smoke suggests overfuelling. This issue becomes progressively worse with age, peaking on cars over 150,000 miles.
What happens if ignoredDense smoke emission will cause immediate MOT failure and indicates significant engine wear. Oil consumption issues can lead to engine seizure if oil levels drop too low. Repair costs range from £200 for valve stem seals to £1,500+ for piston ring replacement on a small capacity engine.
Independent garage
£400–£1,500
Specialist
£500–£1,800
Main dealer
£800–£2,500
Parts only
£100–£400
Major
Emissions system lambda sensor and catalytic converter failure
XP10, XP202005–202280k–150k miles
MOT data shows petrol Aygos fail emissions tests at rates 9.6-13.5 times higher than the national average, with lambda coefficient and general emissions limit failures. This typically indicates failing lambda sensors or catalytic converter degradation, common on high-mileage small capacity engines that spend significant time in urban stop-start driving conditions.
What happens if ignoredEmissions failures cause immediate MOT failure and the car cannot be legally driven until repaired. Lambda sensors typically cost £80-150 to replace, but catalytic converter failure can cost £300-800 including fitting. Driving with a faulty catalytic converter can cause further engine damage.
Independent garage
£150–£600
Specialist
£180–£700
Main dealer
£250–£950
Parts only
£80–£400

1 more known issues tracked

Including wear items, electrical niggles, and generation-specific problems.

MOT failure hotspots

Based on DVSA MOT test data. These are the items where the Toyota Aygo fails at a significantly higher rate than the average car.

Mandatory tell-tale for direction indicators or...
Lights & Electrics · 100-120k miles
MOT failure rate: 73x the fleet average
Sample: 27,569 tests
Hazard warning lamp tell-tale is not a flashing...
Lights & Electrics · 100-120k miles
MOT failure rate: 33x the fleet average
Sample: 30,051 tests
Light unit fault
Lights & Electrics · 80-100k miles
MOT failure rate: 32x the fleet average
Sample: 128,368 tests
Mandatory tell-tale for direction indicators mi...
Lights & Electrics · 150k+ miles
MOT failure rate: 23x the fleet average
Sample: 6,010 tests
Anti-roll bar links worn
Suspension · 20-40k miles
MOT failure rate: 21x the fleet average
Sample: 365,101 tests
Emissions failure
Exhaust & Emissions · 150k+ miles
MOT failure rate: 16x the fleet average
Sample: 7,955 tests

Looking at a specific Toyota Aygo?

Check its dealer service history to see if the maintenance that prevents these problems was actually done.

★GB

£6.99 · Full refund if no records found

Related

Toyota Aygo reliability FAQs

What are the most common problems with the Toyota Aygo?

The Toyota Aygo has 5 known issues across 2 severity levels. The most serious are: Structural corrosion affecting steering and braking safety.

Is the Toyota Aygo reliable?

The Toyota Aygo has 1 dangerous and 4 major known issues. Most can be avoided with a thorough pre-purchase check and full service history.

How much does it cost to fix Toyota Aygo problems?

Repair costs range widely. The most significant issue (Structural corrosion affecting steering and braking safety) costs £300–£800 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.

Which Toyota Aygo generation is most reliable?

The XP10 (2005–2014) has the fewest dangerous issues (1). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.