Purchased 4 cooper evolution tour all season tires (225 50 17 94V). Dot U940 1lt 4119 in November 2019. Tires do not maintain air pressure. Tires require more air within 2-4 days. Sidewalls bulge when fully inflated causing tires to look under inflated but lose air pressure in a short period of time. Also, rolling effect when turning corners at light to moderate speeds. Please provide guidance on what to do to correct the failure. Most recent incident noted in approximate incident date related to lost of air pressure

- Woodbridge, VA, USA

Brand new car (2 months old, about 2000 miles). Received warning on highway that my left rear tire was low and to pull over. I have run flats so I slowed down in right lane and exited to get to a gas station. The tire was not flat but I put air in it and the tpm went back to green. The next morning the same thing happened and I drove straight to BMW of naples where they topped off all 4 tires and said it's normal and to come back if it happened again. The next morning was fine. Day 4 after the first incident we get in the car in the morning and all 4 tires read low. We start driving to warm them up and see if that helps. 3 tires went back up to normal but the back left tires remains low reading. We looked it over and cannot see any punctures, nails, etc. (BMW didn't find anything either although they did not take car into shop to fully inspect). Don't know if there is an issue with tire or issue with tpm. I drive 30 miles on highway each day each way to work. Need to know if there is an actual issue with tire for my safety and those driving around me.

- Fort Myers, FL, USA