Toyota Prius Prime common problems: what to check before you buy
Credov's researched list of the 2 faults the Toyota Prius Prime is known for (2015–2019), 2 of them serious or costly. Each one says what to look for when you check the car, so you can spot it before you buy. Not every car has these faults: they are the ones worth checking on this model.
Known problems on the Toyota Prius Prime
Weak heater and coolant loss
Costly if missed
2015–2019 · 2ZR-FXE · hybrid · Engine
What to look for: Feel for weak heat from the vents with the heater on full when warm, and check the coolant level when cold.
Why it matters: Toyota Japan's notice states that long idling or frequent short trips while the engine is still warming up cycle thermal stress through the exhaust heat recovery heat exchanger, cracking the coolant passage so coolant leaks into the exhaust pipe and falls; the heater then works poorly or the high coolant temperature warning lamp illuminates.
2015–2022 · 2ZR-FXE · hybrid · Exhaust and emissions
What to look for: Engine coolant reservoir low with no visible leak; white steam or sweet smell from the tailpipe; weak heater output.
Why it matters: Toyota bulletin T-SB-0135-19 lists low coolant, check-engine light with P148F00 and poor heater output, and replaces the front pipe with an updated part. Often misdiagnosed as a head gasket; pressure testing tells them apart. Running it low on coolant can still overheat the engine. Left unrepaired this grows into a major repair bill.
Got a question about a Toyota Prius Prime? Ask Credov: a noise, a warning light, a part or how to fix it.
Also check on every car
On top of the faults above, every Credov inspection covers the basics: fuel smell, leaks or filler rust, engine oil leaks, power steering fluid leak, drive belt cracks or squeal, rust underneath: chassis and mounts, engine mounts, engine oil level and colour, coolant level, colour and leaks, head gasket failure signs, cold start: rattle, knock or smoke, rough or hunting idle, engine running hot on gauge, gearbox or diff oil leak, swapped gearbox without lvv and more.
Researched by Credov from manufacturer recalls and service bulletins, owner reports and workshop sources. Repair prices are typical ranges, not quotes. See also fault codes and repair costs.