Buying a used Prius requires a few hybrid-specific checks beyond the standard inspection. P0A80 code, 12V battery condition and inverter coolant are the key items.
This Pre-Purchase Checklist guide combines structured analysis — verdicts, risk scoring and cost ranges where we have enough data — with real fault cases pulled directly from MyCarFault's reporting database, so the guidance below reflects what owners actually experience rather than manufacturer specifications alone. Background and analysis come first, followed by the linked fault reports and related guides you can jump to directly using the links above.
The Prius is a uniquely reliable used car, but its hybrid system requires specific checks that conventional car inspections do not cover. This checklist adds the hybrid-specific items to a standard pre-purchase inspection.
Not always — individual weak modules may not trigger P0A80 until significantly degraded. Module voltage testing is more revealing.
Critical. A failing 12V battery causes the car to not start, show multiple warning lights and behave erratically. Replace if over 4-5 years old.
Yes — if the price reflects the battery replacement cost (£700-1,200). Many dealers sell P0A80 Prii at reduced prices and buyers replace the battery themselves.