Many Tesla owners with Chinese-made LG batteries are facing serious problems much earlier than anticipated. The LG NCM811 battery packs, manufactured at the LGES Nanjing facility in China, are failing at approximately 150,000 miles. That’s about 100,000 miles earlier than Panasonic battery packs, which typically last up to 250,000 miles.
LG Chinese-made Tesla batteries fail at 150,000 miles—roughly 100,000 miles sooner than Panasonic equivalents.
The problem starts with a technical flaw. LG Chinese battery cells have exceptionally high internal resistance—28 milliohms or higher. Panasonic cells, by comparison, have only about 10 milliohms.
Repair specialists describe these high resistance levels as “catastrophic” because they’re defective even when the batteries are brand new. This isn’t a problem that develops over time; it’s built into the cells from the start. EV Clinic experts have documented that LG failure rates significantly exceed industry standards for comparable battery technologies.
What makes the situation worse is that the degradation spreads across multiple cells in the battery pack. It’s not just one cell failing here and there. Instead, entire modules deteriorate uniformly, making the batteries nearly impossible to fix. The cascade effects from multiple failing cells simultaneously compound the repair difficulties.
According to EV Clinic data, over 90% of LG battery packs can’t be repaired at the cell level because so many cells fail together.
The cascading failure mechanism adds another layer of complexity. When one cell fails, it triggers rapid degradation in nearby cells because of how the electrical system is designed. If a repair shop replaces one failed module, the remaining degraded modules operate under increased stress, which accelerates more failures.
The system design doesn’t allow technicians to isolate failed components without compromising the entire battery pack.
This situation is creating serious challenges for repair shops. Some facilities are now charging “feasibility fees” just to diagnose LG battery problems. One repair shop reported monthly losses exceeding €20,000 while investigating whether these packs could be fixed at all.
The diagnostic time required for LG packs is noticeably higher than for Panasonic equivalents.
The LG batteries are used exclusively in Tesla Model 3 and Model Y vehicles built in China. They’re different from the Panasonic NCA packs made in the USA and the CATL LFP batteries used in some Tesla models.
This distinct battery type presents owners with a considerable reliability concern.