Don't buy anything with a late model 2AZ. The piston rings are shot as happens to all of them and it has been burning oil for a while.
Cons: piston rings shot, burning oil
Reviews of OEM Toyota piston rings
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OEM Toyota
Japan
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At 48k a check engine light came on for a P0300, P0302, P0303, P0420 so I brought it to my shop and had our master tech diagnose it and it turned out to have defective piston rings on 2 and 3. Toyota declined to replace the engine under warranty... kept using it until it started having trouble starting due to low compression and at 92k it just wouldn’t start anymore.
Cons: defective, low compression, engine failure
Mileage: 77248 km
You’re in a car well known for excessive oil consumption due to it’s low tension piston rings, at higher mileages. *Absolutely* change the oil in a prius more frequently than most vehicles.
Cons: excessive oil consumption
Vehicle:
Toyota Prius
I’m starting to burn in little oil in my 2.7l 1ar-fe in my 2012 sienna at 272k miles. I guess the low-friction piston rings can get gummed up with extended interval oil changes and start scoring the cylinder walls and cause this issue.
Pros: trouble-free miles
Cons: burning oil
Vehicle:
Toyota Sienna
Mileage: 437741 km
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What we know about OEM Toyota piston rings
The brand is registered in Japan.
In March 2026, PartReview does not yet have a formed opinion of OEM Toyota piston rings. You can help by adding a review for OEM Toyota piston rings.
Currently there are 4 reviews and 14 votes. Average rating — 2 out of 5. Vote balance: 4 up, 10 down.
Users also evaluated the qualities of OEM Toyota piston rings:
- Smoke - blue smoke on acceleration or overrun indicates ring wear - no rating yet
- Power - sluggish acceleration shows compression loss - rated negatively. 1 point out of 5.
- Oil use - frequent top-ups are a simple sign the engine is burning oil - rated negatively. 1.2 point out of 5.
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