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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Air Bag Control Module: Application and ID








DE SRS unit 177960 - SV4 - A91
NEC SRS unit 77960 - SV4 - A92
TAKATA SRS unit 77960 - SV5 - A91


SRS units from three different manufacturers (DE, NEC, TAKATA) are used for the Accord. The type of SRS unit installed depends on the body type of the car. Before troubleshooting, confirm the SRS unit type by its shape and part number (see the label on top of the unit), because the DTC indications and troubleshooting procedures change with the type of the unit. The SRS unit threshold values for deploying the airbags are different for each body type; when replacing a unit, make sure to replace it with a unit of the same type.