What causes water to enter the cylinders of a BMW X5 when wading?

[SanFaith]

There are several reasons why water may enter the cylinders of a BMW X5 when wading: Water entering through the air filter: If the engine only inhales a small amount of water vapor through the air filter, the issue is minor and can be resolved with simple measures. Small amounts of water in oil or fuel: There may be small amounts of water in the oil or fuel, requiring an oil change and cleaning of related engine components. Minimal water ingress into the engine: If a moderate amount of water enters (not mixed with fuel) but the vehicle isn't started, causing no engine damage, the solution involves draining the water, thorough cleaning, reassembly, and an oil change. Severe water ingress into the engine: If significant water enters and the vehicle becomes inoperable after starting, the only solutions are engine replacement or complete vehicle scrapping.