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.
2010–2015 Toyota Prius — common problems & known faults
The 3rd-gen Prius is efficient and reliable overall, but EGR clogging, oil consumption and the hybrid coolant pump deserve a close look.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed July 2026
Known faults to check
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.
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.
ElectricalLow
12V auxiliary battery weakness causing no-start.
- Typically appears
- Age-related
- What to inspect
- Test the 12V battery and check its age.
Inspecting a Toyota Prius?
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Generate a free checklistFrequently asked questions
Is the 3rd-gen Prius reliable?
Yes, with maintenance — EGR cleaning and oil monitoring prevent the main failures.
What kills a Prius engine?
Neglected EGR clogging can starve coolant flow and blow the head gasket.
How long does the hybrid battery last?
Often 150,000+ miles; check for balanced state of charge and any warning lights.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.