Automakers lose emissions credits for start-stop technology under new EPA rules

Syndication February 13, 2026

Start-stop is a relatively small feature with a dense engineering stack behind it. Modern systems tie together the engine control unit, starter-alternator hardware, beefed-up 12-volt or dual-battery architectures, and climate-control logic to shut the engine off during idle while keeping steering assist, brake boosting, and cabin comfort online.

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