Valve stem cracked then completely broke off under the plastic cap. The tire pressure warning light had been coming on 2-3 days prior to incident. Each morning when cold during first start up light would come on, after a few minutes of driving after vehicle warmed light would turn off. On way home from work traveling 70mph light came back on. Took the next exit and stopped at gas station to fill up tires, removed valve stem cap and installed air hose. Air hose could not fill up tire, air just came out of the side of stem, reinstalled valve cap. At that time we didn't know the stem was cracked so I drove the car very slowly approx 3 miles to my parents house so my dad could help. He tried to remove the valve cap, at this time the stem completely broke off at the threads and stayed with the cap. The stem internal parts sprang out so it was necessary to remove the tire and install the spare. We took the tire to nearest belle tire so they could replace the stem but since it was a dealer only part all they could was replace it with a standard rubber stem with no sensor. They mentioned it was a common problem they had seen before, to which I was very surprised. These sensors were created to combat low air pressure after the "tread act" and ironically are causing a low air pressure. The original cause of the pressure light was due to a slightly bent rim on the inside. This had a slow leak after belle tire replaced the stem. We took the tire to brighton mazda the following day to replace the sensor, they too said they had seen cracked stems in the past. Please look into this and determine if this is a safety issue. I think its very ironic this is happening when the free rubber stems almost never fail and $70 sensors are breaking on a 3 year old car.
2009 Mazda MAZDA6 tires complaints
Page 2 of 2: complaints 11 to 14 of 14, newest first, as owners wrote them.
Tl* the contact was servicing a 2009 mazda mazda6. The contact stated that the valve stem on the tire pressure mounting train system was rusted and corroded and causing the tire to leak air abnormally. The contact did not inform the dealer or manufacturer of the failure, nor was the vehicle repaired. The current mileage was 50,349 and the failure mileage was 43,349.
Tl* the contact owns a 2009 mazda 6. While braking, the tire pressure warning light illuminated and the front tire was flat within 30 seconds. The dealer advised that the valve stems were corroded and caused the tire failure. The vehicle was repaired under the contact's factory warranty. The failure and current mileages were 13,000.
Dear sir I have recently bought a new mazda 6 car fitted with dunlop tires sp2050 .while I was driving on the high way the right front tire blew out and causes a hole between the tier wring and the surface that touch the road. Although the car was moving about 80 kmph. My family and myself life was exposed to danger when this incident was happened. The car is brand new it was made only 16,400km. When I went to claim for tier replacement but both mazda and dunlop agents denied responsibility that this is a defective tier.
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