Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Emission Calibration Number

Emission Calibration Number Label (Typical):





The Emission Calibration Number Label is located on the driver side door or door post pillar. It contains the engine calibration number. These numbers are used to identify service parts and engine specifications that make up the powertrain management system designed for the vehicle.