Is it a big deal if the car's valve cap is lost?

[DanielRose]

It won't have any impact. If the tire loses its valve cap, it won't cause air leakage because the valve itself is what functions. Here are the specific reasons: 1. Valve function: As long as the valve is intact, there will be no air leakage. The valve cap only protects the valve core, preventing dust, water, oil, etc., from damaging the valve core's sealing rubber, thereby extending the valve core's service life. 2. Valve cap function: However, it is safer to have the valve cap installed as it can extend the valve core's service life and also looks more aesthetically pleasing. 3. Safety note: After all, tires are related to driving safety and personal safety, so one must not be careless about them.