2015 Toyota Sienna

I have requested urgent warranty evaluation regarding two Kumho Solus TA51a tires installed on my Toyota Sienna (Model: Kumho Solus TA51a, Size: 235/60R17 102H, DOT: 1824) Both front tires are exhibiting abnormal tread chunking and visible surface shredding. The tires are relatively new (purchased about 1-1.5 years ago) and have not been heavily used (only riding this car occassionally, about 5000-7000 miles per year). Our 2 rear tires are Kumho tires of different model, and although older, they are performing fine and do not experience these issues so it seems to be an issue on this particular Solus TA 51a model Kumho tires. Because this is our family vehicle and we transport our children in it regularly, we are very concerned about the safety of continuing to drive on these tires. I also returned to the tire shop that sold and installed the tires. After inspecting them, the owner advised me to contact Kumho for a warranty evaluation, informing me that he received similar complaints from other customers (especially Toyota Sienna owners) using this tire model. While I no longer have the original purchase receipt, the dealer can verify that the tires were purchased from and installed by his shop. I reached out to Kumho Tires USA by completing their online contact form 2 wks ago, which informed a response within 48 hours, but I have not received any response. I called and left a voice message in their warranty department, and in their general customer service line earlier this week, but still not response. I even completed another contact form and also reached out by email, but still no response. Then I remembered my mom recently sharing a concern about her tires, and just found out that she had same 'chunking' issues on her tires, which happened to be the same Kumho Solus TA51a tires from the same tire shop. Her car is Toyota Camry, not a Sienna, so this is happening on this specific tire model across all types of cars they are installed to. Please help!

We recently had two Dunlop P 235 / 50 R 19 tires fail on our car. On 11/5/21, the front passenger-side tire tread and belt began to unravel while driving at freeway speed. This happened suddenly, with no warning lights, and we became aware of the problem when we heard a loud thumping noise from the unraveled tire striking the underside of the vehicle. We immediately exited the freeway, found a tire shop, and had the tire replaced. The following week, I inspected the other tires and found that the front drive-side tire was failing in exactly the same way. We immediately had that one replaced too. Neither tire shop that replaced the tires could identify a cause of the tire failures other than possible defects in the tires.

We purchased Nokian WrG3 225/60 R18 tires as replacements for the original tires, because we wanted all weather capability. They were installed in November of 2016. One tire subsequently was damaged due to road hazard; was replaced with same Nokian tire. In August, 2021, the tires needed balancing. The dealer (same place we bought them) could not balance them because three of the tires had belt separation. I did not check tire serial number, but assume them to be the original three we purchased new. We are awaiting Nokian's response, as the tires are warranted five years from installation. It is unusual three tires would all suffer belt separation, all made at the same time. Logic would say it is a manufacturing defect.

BOUGHT VEHICLE NEW, LIVE IN FLORIDA WITH NO POTHOLES, ETC. THE VAN IS EXTREMELY HARD ON TIRES, FIRST SET OF MICHELIN PRIMACY MXV4 TIRES LASTED TO 26,500 AND WERE SHOT. REPLACEMENT MICHELIN PREMIER LTX TIRES ARE SHOT IN 20,000 MILES. BOTH OF THESE MICHELIN TIRES WERE SUPPOSED TO LAST 60,000 MILES EACH. NEVER ANY DAMAGE TO THE VEHICLE, I AM THE ONLY DRIVER, BUT I JUST SPENT CLOSE TO $800 AT AN ALIGNMENT SHOP GETTING CAMBER KITS AND SHIMS INSTALLED AND ONE NEW FRONT STRUT ALL TRYING TO GET THE VEHICLE ALIGNMENT INTO FACTORY SPECS. AGAIN, NEVER ANY DAMAGE TO THE VEHICLE AND ALL TIRES WORE OUT RELATIVELY EVENLY, JUST WAY TOO PREMATURELY. FIRST PROBLEM IN MY OPINION IS THAT ALL VEHICLES SHOULD HAVE ALIGNMENT ADJUSTMENT ABILITY BUILT IN, THERE SHOULD NOT BE NEED FOR CAMBER BOLT KITS AND SHIMS FOR THE REAR AXLE. NEXT PROBLEM IS THIS EXCESSIVE TIRE WEAR ON TOYOTA SIENNA'S IS CLEARLY DOCUMENTED ALL OVER THE INTERNET, SO THIS IS NOT AN ISOLATED PROBLEM, BUT A WIDE SPREAD TOYOTA PROBLEM. TOYOTA SHOULD RESOLVE THIS FOR THEIR CUSTOMERS.