How to Check if a Car Has Been Flooded
2 Answers
Immediately inspect the engine. First, check whether the engine cylinders have been flooded, as water ingress can cause connecting rods to bend and damage the engine. Check if the transmission has been flooded. Water in the transmission will cause the gear oil to deteriorate, leading to gear wear. Inspect the brake fluid and the four-wheel brakes. Water in the brake fluid will cause it to deteriorate, resulting in brake failure.
With years of driving experience, I've seen water intrusion issues many times. After rain or car washes, I always check the carpets for dampness first, especially under the front and rear seats. Feel for water stains and sniff for musty or fishy odors inside the car—these are clear signs of water ingress. Aged door seal strips can leak rainwater, so inspect carefully for cracks or deformities. Sunroof drain holes easily get clogged by leaves, causing water to back up when drainage fails. Pop the hood to check for water traces around the battery or air filter area. Water intrusion isn't just superficial—over time it can short-circuit electrical components and lead to rust/mold health hazards. I keep moisture absorbers in my car routinely, avoid parking in low-lying areas during storms (prevention saves money and hassle), regularly clean drainage outlets, and avoid blasting water into gaps when washing.
