Damaged sealant: Inspect the sealant between the tire bead and the wheel for any damage or cracks. If your wheel has a removable plastic insert and it's damaged, a sealant can be added to your bead to slow the leak to get you home.
Bent rim: Check for any impact damage to the wheel. A bent rim can cause a leak due to an improper seal.
Valve stem leak: Visually inspect the valve stem for leaks. You may need to tighten or replace the valve stem if it's still leaking.
Tire bead damage: Check the inside of the tire for any damage to the bead, especially around the circumference where it meets the wheel. You can use soapy water to find the exact location of the leak.
Porous alloy wheel: While more rare, porous aluminum alloy wheels can leak air over time. Inspect for pitting on the inside surface of the wheel using a flashlight. If there's visible corrosion or pitting, it may be time to consider replacing the wheel.
Faulty TPMS sensor: If your vehicle is equipped with TPMS and you've recently had a flat tire or tire replaced, the rubber gasket around the sensor may not be properly seated. Tighten the sensor or check the gasket to ensure it's properly seated.
