Generations
XP10 — First Generation
1999–2005
1.0 VVT-i, 1.3 VVT-i, 1.5 VVT-i
Mk2 — Second Generation
2005–2011
1.0 VVT-i, 1.3 VVT-i, 1.4 D-4D
XP90 — Third Generation
2005–2011
1.0 VVT-i, 1.33 Dual VVT-i, 1.33 Stop & Start, 1.4 D-4D
XP130 — Fourth Generation
2011–2020
1.0 VVT-i, 1.33 Dual VVT-i, 1.5 VVT-i, 1.5 Hybrid
Mk3 — Fourth Generation
2020–2024
1.5 Hybrid, 1.5 Hybrid
Top issues to watch for
The most serious Toyota Yaris problems ranked by severity. We track 11 known issues — here are the ones you need to know about first.
Major
Wheel bearing failure (all generations)
MOT data shows Yaris models experience wheel bearing failure at 215.7x the fleet average rate. This affects both front and rear wheel bearings across all generations and engine variants. The consistently high failure rate suggests either bearing specification issues or loading conditions that exceed typical small car parameters.
What happens if ignoredA failing wheel bearing creates increasing noise and vibration, and can eventually seize completely, potentially causing wheel detachment. The car remains driveable with early bearing wear but should be repaired promptly once noise becomes noticeable. Complete bearing failure is dangerous and requires immediate repair.
Independent garage
£120–£220
Specialist
£140–£250
Main dealer
£200–£350
Parts only
£40–£100
Major
Hybrid battery degradation (XP130/Mk3)
The nickel-metal hydride traction battery in Yaris Hybrid models gradually loses capacity over time and mileage. Early symptoms include reduced fuel economy and increased engine running time as the hybrid system compensates for weak battery performance. Complete battery failure triggers warning lights and severe reduction in fuel efficiency, with replacement costs that often exceed the car's value on higher-mileage examples.
What happens if ignoredBattery degradation reduces fuel economy by 10-20% initially, worsening over time until the hybrid system provides minimal benefit. Complete battery failure requires replacement costing £1,000-£4,000, often making the repair uneconomical on higher-mileage cars. The vehicle remains driveable but loses its primary economy advantage.
Independent garage
£1,000–£3,000
Specialist
£1,500–£3,500
Main dealer
£2,500–£4,000
Parts only
£800–£2,500
Minor
Suspension bush and joint wear (all generations)
MOT data shows Yaris models fail suspension component tests at dramatically higher rates than the fleet average - up to 144x higher for worn bushes and joints. This affects front lower arm bushes, anti-roll bar links, and rear axle bushes across all generations. The pattern suggests either specification issues with bush material or geometry that accelerates wear beyond typical small car expectations.
What happens if ignoredWorn suspension bushes cause poor handling, uneven tyre wear, and MOT failure. While not immediately dangerous, severely worn bushes can affect braking stability and steering response. Replacement typically requires multiple components to be changed together for effective repair.
Independent garage
£180–£350
Specialist
£200–£400
Main dealer
£300–£550
Parts only
£80–£180
Minor
EGR issues (XP90)
The 1.4 D-4D diesel engine in XP90 generation Yaris develops EGR valve carbon build-up that causes rough idle and poor performance. This is a common issue on Toyota's 1ND-TV diesel engine when used for short journeys or urban driving patterns. Regular EGR cleaning can prevent complete valve failure and expensive replacement.
What happens if ignoredA blocked EGR valve causes poor fuel economy, increased emissions, and potential MOT failure on smoke tests. Left untreated, carbon build-up can damage the intake manifold and require more expensive repairs. The car remains driveable but performance and economy will progressively worsen.
Independent garage
£200–£350
Specialist
£250–£400
Main dealer
£300–£500
Parts only
£80–£150
7 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 Yaris fails at a significantly higher rate than the average car.
Emissions failure
Exhaust & Emissions · 20-40k miles
MOT failure rate: 144x the fleet average
Sample: 6,077 tests
Light unit fault
Lights & Electrics · 20-40k miles
MOT failure rate: 76x the fleet average
Sample: 3,245 tests
Speedometer not working
Speedometer and speed limiter · 0-20k miles
MOT failure rate: 75x the fleet average
Sample: 2,256 tests
Reversing lamp not securely attached
Lights & Electrics · 80-100k miles
MOT failure rate: 72x the fleet average
Sample: 10,039 tests
Load sensing valve linkage defective
Brakes · 20-40k miles
MOT failure rate: 57x the fleet average
Sample: 15,779 tests
Anti-roll bar links worn
Suspension · 20-40k miles
MOT failure rate: 47x the fleet average
Sample: 61,246 tests
Looking at a specific Toyota Yaris?
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Related
- Toyota Yaris buyer's guide
- Toyota Yaris service history check
- Toyota Yaris service schedule & costs
- Toyota Yaris MOT failure rates
- Toyota Yaris price guide
- How to check Toyota service history
- Buying a car without service history
- Toyota Yaris car check £7.49
- Free car faults check
- Free MOT failure rate check
- Free car check
Toyota Yaris reliability FAQs
What are the most common problems with the Toyota Yaris?
The Toyota Yaris has 11 known issues across 3 severity levels. The most common problems relate to Wheel bearing failure (all generations) and Hybrid battery degradation (XP130/Mk3).
Is the Toyota Yaris reliable?
The Toyota Yaris has 0 dangerous and 2 major known issues. No dangerous issues are tracked, which is a positive sign.
How much does it cost to fix Toyota Yaris problems?
Repair costs range widely. The most significant issue (Wheel bearing failure (all generations)) costs £120–£220 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.
Which Toyota Yaris generation is most reliable?
The XP10 (1999–2005) has the fewest dangerous issues (0). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.