Does BYD still offer battery warranty after vehicle transfer?

[VonSawyer]

Second-hand BYD vehicles' batteries are eligible for the lifetime warranty. However, the battery will not be covered under the lifetime warranty policy if it sustains abnormal damage, which refers to damage caused by human factors. The battery mainly consists of the casing, power management system, cooling system, and battery cells. The primary function of the battery is to store energy. However, the power management system, cooling system, and casing are also crucial. Without these systems, the battery cannot function properly. Within the six-year warranty period, BYD will replace all the aforementioned components free of charge. Over prolonged use, the battery's capacity will gradually decrease as the number of charge and discharge cycles increases. Given the high cost of replacing new energy vehicle batteries, the ability to replace the battery for free is particularly important. To meet consumer demands, BYD offers a lifetime battery warranty policy. BYD's warranty policy is exceptionally favorable, and when the power battery's capacity degrades by 20%, it can generally qualify for a free replacement.

[VonRuby]

I just bought a used BYD Tang last month, and I specifically inquired about the battery warranty during the transfer process. The 4S店 technician said that as long as the vehicle is still within the basic warranty period of 8 years or 150,000 kilometers, the free battery repair service remains valid. However, you need to bring the new owner's ID and vehicle license to an authorized dealership to complete the owner information change registration, so that the system can update the warranty records. For used car transactions, it's best to check the vehicle's manufacturing date to estimate the remaining warranty period. You can also ask the original owner to provide a 4S店 inspection report on the battery condition—when I bought the car, I had the seller show me a battery health inspection report from within the last six months. After the transfer, it's essential to pay more attention to the maintenance of the electric vehicle, and regular battery checks are highly recommended.

[Morgan]

As a professional handling new energy vehicle transfer procedures, I have overseen the handover of hundreds of used BYD vehicles. The basic battery cell warranty remains valid after transfer, typically 8 years or 160,000 kilometers depending on the model. There are three key steps: first, verify if the initial registration date falls within the warranty period; second, bring the green book and transfer invoice to a 4S store within 30 days to update the owner system; finally, keep all maintenance receipts. It's important to note that the warranty for the motor controller in the three-electric system may be shortened, but the battery warranty remains unchanged. New owners are advised to schedule a comprehensive inspection within the first month.

[VonJade]

Last year, after my brother's used BYD Qin was transferred, I specifically studied the battery warranty terms. Found that the basic warranty follows the car, not the owner, and remains valid as long as it's within the eight-year period. But there are two key points: the lifetime warranty right of the first owner automatically expires, and new documents need to be uploaded in the BYD app to complete the certification. We went to a service center at that time, and the change procedure was completed in half an hour. Now it works perfectly, and last time when there was abnormal battery voltage, they replaced the module for free. For used new energy vehicles, it's best to choose those within three years—less battery degradation and longer warranty periods.

[DiHayden]

I remember the BYD Song DM-i I transferred ownership of, handling the battery warranty was simpler than expected. Just called the official 400 hotline and provided the VIN, the customer service said the battery cell warranty is calculated from the manufacturing date, and the transfer doesn't affect the remaining period. The key is to complete the owner change registration at an authorized service center, bringing copies of both old and new owner's ID cards and the vehicle registration certificate. Maintenance records from the last service are required for repairs. I later installed an additional battery guard plate, and the 4S specifically reminded that aftermarket parts don't qualify for the original factory warranty. When buying a used new energy vehicle, it's important to check the accident history thoroughly, as major collisions can affect the three-electric system warranty rights.

[JuneAnn]

Having researched electric vehicle warranty policies for several years, here's how BYD's battery warranty works after ownership transfer: The core components retain the remaining warranty period, with most models maintaining the basic 8-year/150,000 km coverage. Three key points require special attention: Additional benefits for the first owner terminate; original manufacturer parts must be used for three-electric system repairs; it's best to complete system information updates in the transfer month. Once when helping a friend inspect a used Han EV, we discovered the previous owner's fast-charging modifications caused battery damage - such cases void the warranty. We recommend new owners pay attention to charging habits during the first three months, and warranty inspection can be initiated when battery health drops below 70%.