2010 Caravan SXT has been one of my best vans. I had new tires installed in April 2016 after 50K miles on the tires. In September I kept losing air out of one tire and was added air 2-3 times a week. After submersion and soapy water I could not find the leak ( I didn't pay attention to the valve stem.) I added "Slime" and it fixed the problem but as I added air the valve stem cracked. After 3-4 weeks it lost some air. I shopped for a new TPMS valve ($140 each from the dealer) and $45 online w / shipping. Big O Tires were I bought the tires, charged me $25 to install the TPMS. I month later another tire lost air. I checked the valve stem first and there was a leak. I used the old stem to match a new stem (OReilly Auto Part SE54191 for just $7.25) If only tire dealers would suggest to replace all 4 stems. I would probably pay the $40 to replace all stems. These 2 tires cost me over $100 and a lot of lost time for an easy fix. oreilly auto part # se54191 replacement stem $7.25

LOW TIRE AIR PRESSURE LIGHT WENT ON WHEN VACATIONING IN MICHIGAN. STOPPED TO PUT AIR IN TIRE. WHEN I WENT TO PUT AIR IN TIRE, VALVE STEM BROKE OFF COMPLETELY AND SHOT PAST MY HEAD NEARLY HITTING ME. THIS HAPPENED AT ABOUT 3:00 PM ON A SUNDAY AFTERNOON WHEN MOST SHOPS WERE CLOSED. MY FAMILY AND I WERE STRANDED FOR SEVERAL HOURS UNTIL WE COULD FIND A SHOP THAT WAS OPENED THAT COULD REPLACE THE VALVE. IT COST ME $85 US. OUR ENTIRE FAMILY WAS STRANDED FOR SEVERAL HOURS AND I ALMOST GOT SERIOUSLY INJURED. WHEN I TOOK MY VEHICLE IN FOR SERVICING AND MENTIONED THE PROBLEM THE TECHNICIAN SAID THAT WAS A COMMON PROBLEM WITH A CHRYSLER PRODUCT.

I was just shocked to realize what happened. Tire pressure sensed low pressure while driving on interstate 90 in Pennsylvania. I pulled into a gas station to fill the tire and when I pushed the air chuck onto the valve stem, the stem pushed into the tire. At the time, I had no idea what happened. Got the tire up to pressure and started back on the 90. Went about 5 miles when the tire just deflated at 65 MPH. Luckily no accident. Had to put on the "donut". Had a heck of a time finding that donut. Never had a vehicle with the spare under the front end of the vehicle.