EGR cooler / intake clogging leading to head-gasket failure if neglected.
- Typically appears
- 100,000+ miles
- What to inspect
- Ask about EGR cleaning history and check for coolant loss.
- Typical repair
- EGR valve / cooler replacement · £300–£900

Scored from 8 documented faults · reviewed by the VehicleFaults Research Team
On our documented-fault scoring the Toyota Prius rates 4.6 out of 10 · buy with caution. We hold 8 known faults for it and 3 are rated high severity, so the risk is real but contained. The weak points cluster around engine, cooling 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
Weak points cluster around engine, cooling, electrical, brakes.
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Check this carEGR cooler / intake clogging leading to head-gasket failure if neglected.
Excessive oil consumption on the 2ZR-FXE.
Squawking or barking noise when pressing the brake pedal, accompanied by the brake accumulator pump running constantly.
Inverter/hybrid coolant pump failure triggering warning lights.
Clunking or knocking sensation felt through the steering wheel over rough surfaces or when turning at low speeds.
Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.
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