Toyota brand mark

Is the 2010–2015 Toyota Prius reliable?

Scored from 8 documented faults · reviewed by the VehicleFaults Research Team

Quick answer

4.6/ 10
Buy with caution

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

What the score is built from

Critical
0
High
3
Medium
3
Low
2

Weak points cluster around engine, cooling, electrical, brakes.

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The faults that decide it

EngineHigh

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
EngineHigh

Excessive oil consumption on the 2ZR-FXE.

Typically appears
90,000+ miles
What to inspect
Check oil level and watch for low-oil warnings.
Typical repair
Oil leak trace & seal / gasket · £180–£700
BrakesHigh

Squawking or barking noise when pressing the brake pedal, accompanied by the brake accumulator pump running constantly.

Typically appears
80,000-120,000 miles
What to inspect
Press the brake pedal firmly several times while stationary. Listen for a loud 'barking' noise from the bulkhead and time how often the accumulator pump primes.
Typical repair
Brakes (discs, pads, caliper) · £200–£800
CoolingMedium

Inverter/hybrid coolant pump failure triggering warning lights.

Typically appears
90,000+ miles
What to inspect
Scan for P0A93 and confirm the pump runs.
Typical repair
Cooling component replacement · £220–£750
SteeringMedium

Clunking or knocking sensation felt through the steering wheel over rough surfaces or when turning at low speeds.

Typically appears
50,000-90,000 miles
What to inspect
With the vehicle stationary and the hybrid system active, rock the steering wheel rapidly left and right by a few degrees. Listen and feel for a distinct clunk in the column.
Typical repair
EGR valve / cooler replacement · £300–£900

Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.

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