High-voltage battery short-circuit recall (ARB6 / ARB7)
Traced to a manufacturing defect in LG Energy Solution cells built at its Poland plant. After smaller earlier campaigns (January and April 2024, covering a few hundred cars each), Porsche expanded the recall on October 1, 2024 to roughly 27,000 US Taycans across the 2020–2024 model years, under two internal codes: ARB6 cars are told to charge to no more than 80% until the fix is done; ARB7 cars have continuous over-the-air monitoring and don't carry the charge limit. The remedy is dealer analysis of the battery's module data, replacement of any modules showing anomalies, then installation of on-board diagnostic software that keeps watching for the fault going forward — all free of charge. Owner letters went out around late November 2024 with the fix projected for early 2025, so by now most cars should be done, but a used car that sat unregistered or changed hands through auction may not be. This research pass confirmed the codes and dates via forum recall threads and news coverage; it couldn't retrieve the NHTSA campaign documents directly.
What to check
- Run the VIN through NHTSA's recall lookup and have a Porsche dealer confirm ARB6/ARB7 status — not just "open" vs. "closed," but whether modules were replaced
- Ask the seller whether the car is (or was) under the 80% charge-limit instruction, and whether a dealer ever replaced battery modules
- Treat an open battery recall as non-negotiable: get it closed before purchase, or price in the time without the car while the dealer does it
