1NZ-FXE
Toyota · 1.5L Hybrid I4
1997–2020
Capped at 84: scores above 84 need at least 5 independent sources, including an official or specialist one. Rubric result: 87/100.
"Toyota's first mass-market hybrid petrol engine (Prius NHW11/NHW20, Yaris Hybrid 2012-2020). An Atkinson-cycle 1.5 with a timing chain and an easy life thanks to the electric motor. Wear arrives late: oil burning past about 200,000 km and chain wear; on the 2004-2009 Prius the electric water pump was recalled. Check the recall and the oil level."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 3
Oil consumption from worn piston rings at high mileage
▸Oil level drops between services, oil warning light, blue smoke on start-up
Age-related on the NZ engines: 200-300 ml per 1,000 km is considered normal from about 150,000 km; rings and valve seals are replaced only above about 500 ml. US Prius owners report it at an average of 137,000-144,000 miles (about 220,000-231,000 km), with repairs around 3,600 USD (conv. ~3,300 EUR).
Check the dipstick before buying a high-mileage hybrid taxi or import; top up between services.
Electric water pump coil corrosion - recall (Prius 2004-2009)
▸Hybrid system warning (red triangle), sudden loss of drive power or stall-like condition, overheating warning
NHTSA recall 12V536000: on 2004-2009 Prius built August 2003 to March 2009 a scratch on the coil wire of the electrically driven water pump can corrode; the pump stops or shorts and opens a fuse, causing a stall-like condition of the hybrid system. Dealers replaced the pump free of charge from January 2013. Owners report replacement pumps failing again.
Ask a Toyota dealer to check the VIN for the pump campaign, especially on an imported Prius.
Timing chain, sprocket and tensioner wear at high mileage
▸Rattle on cold start or at idle, cam timing fault codes
The NZ chain has a limited life: about 150,000 km is treated as the point to inspect it. Replace the chain together with the sprockets, tensioner and guides. A US Yaris owner reported worn camshaft sprockets at 160,000 miles.
Fresh oil at the right interval is what keeps the chain alive.
This report covers the combustion engine only. Battery and electric motor reliability are not included.
Models with 1NZ-FXE 1
Related Guides
Other Toyota Engines
Tuning Potential
N/A
Frequently Asked Questions
Is the Toyota 1NZ-FXE reliable?
The Toyota 1NZ-FXE scores 84/100 with a verdict of BUY. It has 3 documented issues with total repair costs between €3,300 and €0.
What are the common problems with the 1NZ-FXE?
The most common issues are:
- Oil consumption from worn piston rings at high mileage — high, repair cost €3,300–N/A, 150,000 km–231,000 km
- Electric water pump coil corrosion - recall (Prius 2004-2009) — moderate, repair cost N/A–N/A, N/A–N/A
- Timing chain, sprocket and tensioner wear at high mileage — moderate, repair cost N/A–N/A, 150,000 km–N/A
What cars use the Toyota 1NZ-FXE?
The 1NZ-FXE is found in:
- Yaris (2012–2020)
How much does it cost to repair the 1NZ-FXE?
Total potential repair costs for all 3 known issues range from €3,300 to €0.
What years was the 1NZ-FXE produced?
The Toyota 1NZ-FXE was produced from 1997 to 2020. It is a 1497cc I4 hybrid engine.
Scores are calculated from documented issues, repair costs, and failure patterns across thousands of owner reports and technical sources. Learn about our methodology. Always inspect before you buy.