BatteryHigh
Hybrid battery capacity decline on high-mileage or long-stood cars
- Typically appears
- 100,000+ miles
- What to inspect
- Run a hybrid health check and watch the state-of-charge behaviour
- Typical repair
- Significant repair · £400–£1,400
Is the 2012–2025 Toyota Yaris reliable?
Scored from 8 documented faults · reviewed by the VehicleFaults Research Team
Quick answer
4.8/ 10
Buy with cautionOn our documented-fault scoring the Toyota Yaris rates 4.8 out of 10 · buy with caution. We hold 8 known faults for it and 2 are rated high severity, so the risk is real but contained. The weak points cluster around battery, brakes and electrical. A well-serviced example with evidence for the big-ticket items is usually a safe buy; the score describes the model, not the specific car in front of you.
Verdict · Walk unless the history is spotless
What the score is built from
- Critical
- 0
- High
- 2
- Medium
- 5
- Low
- 1
Weak points cluster around battery, brakes, electrical, suspension.
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Check this carThe faults that decide it
Engine CoolingHigh
Water pump bearing wear leading to coolant leaks and potential engine overheating.
- Typically appears
- 60,000-80,000 miles
- What to inspect
- Shine a torch down the auxiliary belt side of the engine block. Look closely for a crusty pink residue around the water pump housing and pulley.
- Typical repair
- Head gasket / cooling system repair · £900–£2,600
BrakesMedium
Rear brake corrosion because regen does most of the braking
- Typically appears
- Age-related
- What to inspect
- Inspect rear discs and drums for scaling
- Typical repair
- Brakes (discs, pads, caliper) · £200–£800
ElectricalMedium
12V auxiliary battery failure causing no-start
- Typically appears
- 5+ years
- What to inspect
- Check the 12V battery condition, not just the hybrid pack
- Typical repair
- Starting & charging parts · £150–£650
Body/InteriorMedium
Water ingress into the boot causing damp carpets, musty odours, and heavy cabin condensation.
- Typically appears
- 5+ years / 50,000+ miles
- What to inspect
- Lift the boot floor and inspect the spare wheel well for standing water or rust. Feel the rear seatbelt lowers and the edges of the boot carpet for dampness.
- Typical repair
- Body & corrosion repair · £250–£1,800
Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.
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