Every Toyota Prius generation, ranked by reliability – Jalopnik

The Toyota Prius is more than a global household name; it’s an icon that set the template for mass-market hybrid vehicles. The original Prius was launched in 1997 as the world’s first mass-market hybrid model, proving that a car can indeed switch off its petrol engine and run purely in EV mode at low speeds to save fuel. This is achieved through a clever interplay of the petrol engine, the electric motor and the small self-charging battery, making the Prius a EPA-estimated fuel economy of up to 57 mpg combined, putting it among the most fuel-efficient cars ever sold in America.

Because drivers regularly prioritize fuel economy as a means to combat the cost of living, the Toyota Prius often ends up at the top of the priority list for most buyers. But reliability also remains one of the most important considerations for potential owners, as it helps eliminate worries about breakdowns and ensures low running costs. Fortunately, Priuses have generally proven to be very reliable, and well-maintained examples with more than 300,000 miles on the odometer are not uncommon. But you’ll find that some generations are more so than others.

As a result, we have ranked the best Toyota Prius generations based on consumer reviews and their performance in reliability studies. For each generation, we averaged the cars’ reliability scores based on their ratings Consumer Reports’surveys. This has allowed us to fit the current fifth-generation Prius, considering the 2023 through 2026 models, which are CR rated. However, since no reliability studies have been conducted on the first-generation Prius, we based our rating on owner reports.

Toyota really upped the ante with the introduction of the third-generation Prius in 2009. The 76-hp 1.5-liter 1NZ-FXE inline-four and 67-hp permanent magnetic synchronous electric motor in the second-generation car were replaced by a larger 1.8-liter four-cylinder 2ZR-FXE engine along with an 80-hp electric motor, which together boosted combined power to 134 hp. 110 in the second generation Prius.

The third-generation car pushed the boundaries even further by introducing the first plug-in Prius, user-selectable driving modes (EV, Eco and Power), as well as the brand’s first electric water pump and exhaust gas recirculation (EGR) system. These additions were crucial for reducing nitrogen oxide emissions and internal friction, while increasing the Prius’ average fuel economy from 46 to 50 mpg.

However, some of these features also introduced additional points of failure. For example, the exhaust gas recirculation (EGR) system, which returns some of the exhaust gases to the combustion chamber to help reduce nitrogen emissions, can become clogged with carbon deposits above 100,000 miles. Over time, the unusually high levels of carbon deposits can lead to misfires, the dreaded ‘Prius Death Rattle’ and possibly the much-publicized head gasket leaks seen in many third-generation Prius models. Also, there have been reports of oil consumption in 2010-2014 Prius models equipped with low-tension piston rings, while others point out that their third-generation Priuses have suffered from brake sensor problems, which can manifest in delayed response or make the brakes feel somewhat inconsistent.

As groundbreaking as the first-generation Prius was, the general feeling is that it’s not at the forefront of Prius reliability, especially given its nagging teething problems. According to the National Highway Traffic Safety Administration (NHTSA), electric power steering problems are often cited as a major car complaint.

In 2011, Toyota had to recall approximately 52,000 Gen 1 Priuses due to the risks associated with loosening of the nuts that secure the pinion shaft in the steering rack. When that happens, the pinion shaft becomes unstable, which in turn reduces power steering, making the steering feel too stiff in left turns.

Apart from that, there have been numerous cases where the steering torque sensor wears out prematurely and manifests itself as severe shaking of the steering wheel. Another common fault with the first generation Prius has to do with the brakes. Some owners explain that if they encounter a bump while braking, the brakes are temporarily unable to slow the car, resulting in a noticeable increase in braking distance.

After the third generation car, the reliability of the Prius has continued to improve, and the wedge-shaped fifth generation Prius benefits greatly from the high standards set by Toyota. The four models launched so far collectively have an above-average reliability rating from Consumer Reports.

That includes an excellent reliability score for the 2023 Toyota Prius, as well as above-average numbers for 2024 through 2026 Prius models. It’s especially impressive when you consider that this means the Gen 5 Prius has Consumer Reports’ second-highest average reliability score ever. Obviously long-term reliability has yet to be determined due to the shorter production run, but based on owner responses about their reliability, the Gen 5 Prius doesn’t appear to have suffered any major faults thus far.

NHTSA Data shows that owners have had very few complaints so far. One minor downside is that the fifth-generation Prius has been the subject of three recalls, affecting the 2023 and 2024 models. The 2025 model, in turn, has had one recall due to a glitch in which the rearview camera display freezes or shows a blank image when the vehicle is in reverse (the 2023 and 2024 models were also recalled for similar reasons).

The second-generation Toyota Prius proved more attractive than the first-generation car, and for good reason. It was bigger, faster, more powerful and 15% more efficient than the car it replaced, despite using the same 1.5-litre NZ series Atkinson cycle engine as the Gen 1 Prius. It also impresses in terms of reliability. The engine has shown that it can withstand extreme abuse without fuss (check out what a Toyota Prius engine looks like after 500,000 miles), and owner stories show that the car itself is significantly more reliable than the first-generation model. That aside, there’s an argument that the second-generation Prius is the most reliable Prius generation yet.

That’s no surprise, as this generation was built with an emphasis on reliability. Toyota had had years to address the teething problems with the first generation Prius and refine its hybrid technology by the time the second generation car came out. But it is certainly not perfect, because there are complaints from motorists that the headlight does not work properly. The headlights may turn on and off on their own, stop working on both sides, or experience a malfunction on one side. In addition, there are reports of the engine burning oil, and as they age, there are some common problems to look out for, including battery degradation and inverter water pump failure. Despite these issues, the general perception of the second-generation Prius models is that they are very reliable.

At number one is the fourth-generation Prius, which has proven popular among Prius fans because it is impressively reliable. Two of this generation’s seven models scored excellent reliability points in Consumer Reports’ survey, while the remaining five all scored well above average, making this the Prius generation with the highest average reliability score ever measured by Consumer Reports.

But the fourth-generation Prius didn’t take first place solely on its solid performance in CR’s surveys. Outside of routine maintenance, many owners report that the Gen 4 Prius has maintained its reliability over the long term, with very few unexpected visits to the repair shop. This generation resolved the most common problems plaguing third-generation Prius models, including head gasket failures and EGR valve failures caused by carbon deposits clogging the valve. It’s not immune to problems, though, and when something goes wrong with the fourth-generation Prius, it usually involves the windshield, which tends to crack easily. A few owners have also reported issues with the cracked heat exchanger on this generation of Prius.