Mazda CX-5 SAS module KEAD-57K30C: clearing crash data when tools can't

What the SAS control module actually does

Mazda calls it the SAS control module — the parts catalog lists it as "Unit, Air Bag Sensor" or "Diagnostic Unit." It's the brain of the restraint system: it reads the impact sensors and decides which front airbag, side airbag, curtain airbag, and seat-belt pretensioner fires, then broadcasts the deployment signal to the body control modules so the doors unlock and the hazards flash.

Once it commands a deployment — or in some cases just registers a hard enough hit — it writes a permanent record of that event into its own memory and stops arming. That's the "crash data" everyone talks about. The module is mechanically and electrically fine; it's the stored data that's holding the SRS light on.

KEAD-57K30C and its supersessions

KEAD-57K30C fits the 2023–2025 Mazda CX-5. Mazda has revised the part several times and each revision replaces the last, so a KEAD-57K30E on the shelf is the current number for a car that left the factory with a K30, K30A, K30C, or K30D. They are the same module family, and the reset is the same job.

Always compare the sticker on your module to the number you're quoting. If it starts with a four-character Mazda prefix followed by 57K30, it's a SAS control module and we can look at it.

Why generic crash-erase attempts fail on this part number

The subscription tool platforms that most shops use read the module over a connector and try to rewrite the stored data. On this generation of Mazda SAS module those reads routinely stall or come back incomplete — techs burn their tool credits, get nothing, and hand the car back with "module must be replaced." In some units the board itself needs attention before it will even read reliably.

That's the whole reason this page exists. Plenty of national outfits advertise Mazda SRS resets; ask them for KEAD-57K30C specifically and they'll sell you a used module instead — when they have one. We do the work at board level, which is what this part number needs.

The body-shop math

A new Mazda SAS module is roughly $457–$654 for the bare part, and dealer programming labor comes on top of that — plus the scheduling headache of getting the car to a dealer mid-repair. Used units for this generation are scarce and aren't tied to your VIN.

Resetting the module already bolted into the car is $200, or $250 with overnight return. One business day on the bench, no dealer visit, and the number on your estimate drops by several hundred dollars per job. For a shop doing collision work on modern Mazdas that difference adds up fast.

Removal, shipping, and reinstall

1. Ignition off, negative battery cable disconnected, then wait a minimum of one minute so the module's backup power supply is fully depleted before you unbolt anything.
2. Remove the SAS control module (center console area on the CX-5), handling it by the housing — never by the connector.
3. Bag it anti-static, box it with padding on all six sides, and ship tracked and insured with the order paperwork inside.
4. We clear the crash data, restore the original factory data block, and bench-test the module before it goes back out — within one business day of arrival.
5. Reinstall it and cycle the key. All crash data is cleared and no further modifications are needed — same module, same part number, same VIN, SRS light out.

One thing the reset does not cover: deployed airbags, pretensioners, seat belts, and clock springs are physical parts and still have to be replaced per Mazda's collision procedure.

Questions buyers ask before sending it in