The wheel lug nut 'caps' fall off or become loose and impair the proper function of the lug nuts when changing wheels. Many instances have resulted in stripping these lug nuts and needing to replace them for proper function. I consider this a severe safety defect in manufacturing design. The car companies should be held responsible for designing basic auto safety elements that endure the life of the vehicle.

- South Charleston, WV, USA

While travelling on the interstate at 75 mph the valve stem exploded. The tire lost all of its air within about 10 seconds. The aluminium nut on the outside that holds the valve stem and tire pressure monitor onto the wheel had broken apart. Upon further inspection of the other valve stems I found that 2 of the remaining three were also plagued with cracked nuts.

- Tempe, AZ, USA

When getting off the highways down ramp at 40 mph the tire valve broke off the tire and went flat instantly. This also happen on my Dodge Ram 2009 last year so this issue is dangerous. I was lucky because on both vehicles it was the back tire. Someone could loose control if it was the front tire. The nuts that hold the tire valve in corrode very quickly and break off.

- Hubbardston, MA, USA

Aluminum valve stem corroded to the point of failure on the interstate. Was going 80mph when tire stem blew. Fortunately got vehicle to a stop and under control. This is the third aluminum stem that has done this on my 2010 Grand Cherokee and with no warning.

- Kenosha, WI, USA

Driving at highway speed, steering wheel began gradual pull to the left. Shortly thereafter, lf tire went flat. Pulled to shoulder and replaced tire. Upon examination, valve stem found missing. Tire dealer dismounted tire and found stem/tpm assembly inside the tire. Retaining collar apparently failed. Dealer also found a second valve stem sufficiently corroded to require replacement.

- Princeton, MA, USA