Share of Vehicle Recalls Citing High-Voltage Batteries (12-Month, %)

## What this measures

Of the vehicle recall campaigns NHTSA received over the latest 12 months, the percentage whose defect summary or remedy names a high-voltage battery, traction battery, lithium-ion battery or battery pack, module or cell.

## Why it matters

Battery defects are the costliest electric-vehicle recalls (pack replacements, fire risk) and a read on how mature EV supply chains are as volumes grow.

## How to read it

Higher means a larger share of recalls involve EV batteries. It rises with the number of electric vehicles on the road as well as with defects.

## What it does not say

A campaign is dated by when NHTSA received the manufacturer’s defect report, not when owners were told or the repair was ready. Units are those the manufacturer estimates may be affected, not vehicles found defective. One defect can produce several campaigns (one per manufacturer or report). The match is on words in NHTSA’s summaries; a 12-volt battery recall is counted only when it is described as a battery pack, module or cell.

## How it's built

Trailing 12 months of vehicle campaigns ending with the month shown. A campaign counts when its defect or remedy text contains one of: high-voltage battery, HV battery, traction battery, lithium-ion battery, battery pack, battery module, battery cell (set before any count was made). Months with fewer than 200 campaigns in the window are left out. Palanor calculation.

## Source

National Highway Traffic Safety Administration, recalls data (static.nhtsa.gov/odi/ffdd/rcl/FLAT_RCL_POST_2010.zip, layout RCL.txt), refreshed daily by NHTSA; U.S. government work. Refreshed daily by /api/cron/risk-events-sync?source=nhtsa.