Will New Energy Vehicles Be Scrapped If Submerged in Water?

[ColinMarie]

New energy vehicles will be scrapped if submerged in water. This is because the core component of these vehicles is the battery pack, which will be directly rendered useless if soaked in water, and the vehicle's circuitry will also be largely destroyed. Below are the hazards of water-damaged vehicles: 1. Vehicle Components: The interior of a car contains a large number of electronic components. If submerged, the reliability of the vehicle for future use will be compromised. Even after replacements, it is difficult to guarantee the vehicle's reliability, and the likelihood of malfunctions will increase over time. 2. Vehicle Interior: When the interior is submerged, odor is an inevitable issue. Since the usual treatment methods after submersion include rinsing, drying, and sun exposure, some hidden areas can easily become breeding grounds for bacteria, leading to unpleasant odors.

[LeHolden]

As an ordinary office worker who has driven an electric vehicle for five years, I personally experienced a waterlogged car accident after a heavy rainstorm last summer. At that time, the road surface water suddenly rose to half the height of the car door. After being towed to the repair shop for inspection, it was found that the battery pack's sealing held up well, but the motor controller got flooded, costing 20,000 yuan in repairs. The mechanic said that if the water had risen above the dashboard level, the battery pack would most likely have been flooded and short-circuited, with replacement costs potentially exceeding 100,000 yuan. In such cases, insurance companies would generally declare it a total loss and scrap the vehicle. So the conclusion is that it depends on the extent of waterlogging: minor cases can be fixed with electrical repairs, while severe cases result in the vehicle being written off. Now, whenever I encounter flooded road sections, I always take a detour. After all, the battery is the lifeblood of an electric vehicle—if it gets flooded, the repair cost could be more expensive than buying a new car, like a heart bypass surgery costing more than the car itself.

[SanMiles]

My neighbor's hybrid car was submerged in the underground garage during last year's typhoon, with water levels rising above the roof. When the repair shop opened it up, they found the entire battery pack covered in water scale. The insurance company estimated that replacing the battery would cost more than the car's value, so they directly processed it as a total loss. From what I understand, the battery packs of new energy vehicles are located at the chassis, and their waterproof performance is designed for daily protection, not submarine-level. High-voltage batteries are prone to short circuits and fires when exposed to water, and repair costs are generally high. Typically, if the repair cost exceeds 50% of the car's value, there's a risk of it being declared a total loss. Additionally, water-damaged cars often have hidden corrosion issues in their internal electronic circuits, and even after repairs, there's a risk of spontaneous combustion. Now, they've bought comprehensive insurance to avoid such significant losses in the future.

[LaElijah]

Auto mechanic Xiao Zhang told me that out of the three water-damaged electric vehicles he handled last month, two were declared total losses due to water ingress in the batteries. New energy vehicles are most vulnerable to water damage in their battery packs. Although high-voltage battery packs are rated IP67 for water resistance, they can't withstand being submerged for more than half an hour. He advised calling a tow truck immediately after water exposure and never attempting to restart the vehicle, as this could increase the risk of battery short circuits. Typically, if the water level exceeds the midpoint of the wheel hubs, the battery seals should be thoroughly inspected. If repair costs exceed 70% of the vehicle's residual value, it's more economical to declare it a total loss.

[NevaehFitz]

After my friend's Tesla Model 3 got flooded, I specifically researched the situation: water damage to the battery management system can cause signal disruptions, and motor immersion leads to permanent magnetic loss—repair costs for these two items typically start at five figures. The critical point is that battery modules cannot be replaced individually; the entire pack must be swapped, costing roughly over 40% of the car's total value. If the water level exceeds the seat position, there's a risk of total loss, and the vehicle's residual value can drop by half, with flooded electric vehicles being virtually unsellable in the used car market.

[MacHannah]

From a technical perspective, whether a flooded new energy vehicle is totaled hinges on three key factors: battery pack waterproofing, repair cost-effectiveness, and safety hazards. Water-induced short circuits in high-voltage battery circuits can cause irreversible damage, with replacement costs typically ranging from 80,000 to 150,000 RMB. When total repair costs approach the vehicle's residual value, insurers tend to declare it a total loss. Additionally, flooded vehicles experience progressive insulation degradation, posing potential electric leakage risks. Immediate disconnection of the low-voltage battery is recommended after flooding, followed by professional battery health assessments before deciding on repairs—safety must always remain the top priority.