How to Repair Water Ingress in the Body Module?

[McAlaina]

Disassemble and inspect the engine to remove internal water accumulation, and check whether the pistons, connecting rods, and combustion chamber cylinders have deformed. Replace the damaged connecting rods, pistons, and combustion chamber cylinders. Additionally, disassemble the exhaust manifold to allow water that has entered the exhaust pipe to drain out. When a small amount of water enters the engine, if the engine undergoes a secondary ignition and symptoms such as insufficient engine power and white smoke from the exhaust pipe are observed, stop the vehicle immediately. Tow the car to a repair shop, disassemble the engine intake pipe, intake manifold, and spark plugs, and use compressed air to dry out the water in the cylinder combustion chambers.

[DelEmiliano]

With years of experience in automotive repair, I've found that water ingress into body control modules is a common yet troublesome issue. The first step is to immediately turn off the engine and disconnect the negative battery terminal to prevent short circuits and potential damage to electrical components—safety comes first. Next, carefully remove the waterlogged module, wipe off surface moisture with a clean towel, and place it in a well-ventilated area or use a low-temperature hair dryer to dry it out. Avoid excessive heat to prevent damage to electronic components. After thorough drying, inspect the board for corrosion marks or water stains; if severe, replace the module entirely rather than attempting risky repairs. Wait one or two days for complete drying before reinstalling and testing. If unable to handle it yourself, promptly visit a professional workshop for inspection and replacement. Common causes of water ingress include poor sealing or driving through deep water—after repairs, always check door or engine bay seals to prevent recurrence. Regular car washing with controlled water usage can help prevent this issue.

[ChristianRose]

As a hands-on car enthusiast, I've tinkered with waterlogged modules myself. The moment I spot water intrusion, I immediately disconnect the battery to prevent further damage to other components. After removing the module, I've had good results placing it in a sealed bag with rice or silica gel desiccant for several days to absorb moisture – though this is just a temporary fix. Once dried thoroughly, I spray electronic cleaner on the connectors to remove residue before testing. DIY repairs can be rewarding but risky – I successfully revived a slightly water-damaged module once, saving both money and hassle; but another time corrosion forced me to replace it at a cost of around 300 yuan. Water ingress often stems from parking during heavy rain (leaks) or mud splashes, so prompt action prevents total vehicle failure. If unsure about severity, getting an assessment at an affordable local garage is the wisest move. Remember to regularly check that underbody drain holes remain unclogged.

[VanGrace]

As a daily driver, my experience is that when the body module gets wet, don't hesitate. Immediately park the car, turn off the power, and disconnect the battery's negative terminal to prevent accidents. Manually remove the module and dry it as soon as possible, either by airing it on the balcony or using cool air to speed up drying—avoid high-temperature tools. Wait at least 24 hours for it to dry completely before reinstalling and testing if it works. If there are signal abnormalities, you must replace the part. The process isn't difficult, but water ingress can cause short circuits or signal failures, so going directly to a repair shop is more reliable. From a practical perspective, module water damage is common in older vehicles due to seal aging. After repair, reinforce the door rubber seals for protection. Prevention is better than repair—simply avoid waterlogged roads during rainy days.