NHTSA Complaint #10558441 — 2011 TOYOTA PRIUS

TIRES issue reported to NHTSA

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Complaint Details

ODI Number	10558441
Vehicle	2011 TOYOTA PRIUS
Component	TIRES
Date of Incident	January 3, 2014
Date Filed	January 4, 2014
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	DE

Consumer Description

I PURCHASED A SET OF 4 MICHELIN DEFENDER XT TIRES FOR MY 2011 PRIUS II FROM COSTCO ON 11/29/2013. THE TIRES ARE MARKETED BY MICHELIN AS LLR (LOW ROLLING RESISTANCE) TIRES. HOWEVER UPON INSTALLING THEM AND OPERATING THE VEHICLE FOR NEARLY 1000 MILES, I FOUND THE MPG TO BE NEARLY 10 MPG. LESS THAN THE OEM TIRES THAT THESE REPLACED. THE ROLLING RESISTANCE OF THESE TIRES ARE HIGH. VEHICLE ALMOST FEELS LIKE BEING DRIVEN OVER SAND. AS SOON AS I TAKE MY FOOT OFF THE ACCELERATOR, THE VEHICLE DECELERATES RAPIDLY, MUCH FASTER THAN THE OEM TIRES. I CHECKED THE TIRE PRESSURE, ALIGNMENT, AND WHEEL BEARINGS, ALL ARE WITHIN SPECS. IT APPEARS TO ME THAT THE HYSTERESIS LOSSES IN THIS TIRE MATERIAL ARE FAIRLY HIGH. THIS TIRE SHOULD NOT BE SOLD AS A LOW ROLLING RESISTANCE TIRE. IT IS BEING FALSELY ADVERTISED AS HAVING THIS CAPABILITY TO INCREASE SALES. THE MPG DIFFERENCE WAS MEASURED BY CALCULATING THE TRUE MILES FROM MY GPS UNIT AND DIVIDING THE RESULT BY THE GALLONS TO FULL AT THE SAME PUMP. THIS WAS DONE THREE TIMES TO ACCURATELY ACCESS THE TRUE MPG DIFFERENCE. NO OTHER FACTORS ON THE VEHICLE HAS BEEN CHANGED. ONLY CHANGE HAS BEEN REPLACEMENT OF THE TIRES. *TR

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