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Toyota Prius Engine Problems

2121 TrueDelta members own (or used to own) a 2000 or newer Toyota Prius. 294 of these members (13.9%) have reported engine repairs for their car. A total of 404 engine repairs to Toyota Prii--an average of 0.2 per vehicle--have been reported.

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently Toyota Prius problems occur, check out our car reliability stats.

Chart based on 1486 repairs.

Toyota Prius engine repair cost distribution

Chart based on 303 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Non-members can see only ten Toyota Prius repair histories. Log in or join us to see them all.

2007 Toyota Prius 4dr Hatch

76-horsepower 1.5L I4 Hybrid CVT FWD

17000 mi   Electric motor in Hybrid system seems weak. Less resistance than when new, lower gas mileage than when new. 
5000   Car died. Towed to dealer. They said originally battery defective under warranty plus bad fusible link. Later said inverter bad therefore nothing covered under warranty. Want $5500 plus tax to repair. Asked why no warranty. Answer nothing defective. 
5000 US $3400 Car died. Battery determined defective. Also found a fuse and inverter bad. Only battery and tow covered under warranty. Owner paid the rest. 
26000   Coolant pump sounding noisy. Replaced pump under warranty. 

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2006 Toyota Prius 4dr Hatch

76-horsepower 1.5L I4 Hybrid CVT FWD

5000 mi US $50 Tire press. light came on while driving, stopped and put air in and tried to reset but the light did not go off. More user error- I didn't hold the set button down long enough and they put in a little more air. 
36000   Coolant transfer pump made high pitched whine on start-up and shut-down, especially in cold weather. Pump replaced under warranty. 
121000 US $315 Weeping engine coolant pump replaced. 
135000   Replaced HV battery due to reduced battery capacity resulting in poor climbing performance. 

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2006 Toyota Prius 4-door

4-cylinder hybrid CVT 2WD

41000 mi   Noisy coolant recirculating pump. Installed parts. 

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2005 Toyota Prius 4dr Hatch

76-horsepower 1.5L I4 Hybrid CVT FWD

85000 mi US $240 Thermostat replacement. 

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2004 Toyota Prius 4dr Hatch

76-horsepower 1.5L I4 Hybrid CVT FWD

112000 mi US $239 Repaired in June. Car died on road. Wichita Toyota dealership replaced a fuse to repair,charged $240 service advisor lied as to which fuse I later found out. Replaced faulty cooling pump myself. 
45000   Inverter Water Pump. Car not driveable. Parts had to be ordered. Took 2 days for parts to arrive and 1 day to install. 
106000 US $400 Gas engine water pump was considered leaking by the dealer. Not noticed by owner. 
110700   Water pump and thermostat had to be replaced 
57040 C $44 Check engine code P0138 post-catalytic converter O2 sensor. Part ordered. 
58900   Dealer replaced O2 sensor, but check engine light still came on. I then purchased a ScanGauge for $170 to clear and diagnose the problem. 
61380   Check Engine light P0031 fixed by replacing air-fuel ratio sensor. I purchased the replacement sensor over the Internet since dealer price was high. 
116560   Replaced oxygen and air/fuel sensors to clear check engine light.  Also replaced a leaking exhaust gasket. Dealer also replaced inverter cooling pump at no cost (recall). Replaced brake fluid (maintenance item). 
140720   Replaced stainless steel muffler since it had developed a hole. 

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