SKU: 48906 — Locked Airbag Module Reset
Module Name (Mazda): SRS “SAS Unit” (Supplemental Restraint System)
Vehicles: Mazda CX-5 (2022, 2023, 2024, 2025)
Primary Part #: KEAD57K30
Supersessions: KEAD-57-K30 · KEAD-57-K30A · KEAD-57-K30C · KEAD-57-K30D · KEAD-57-K30E · KEAD57K30 · KEAD57K30A

Why Your Mazda Stores Crash Data (and What To Do About It)

When a Mazda CX‑5 detects an impact, the airbag control module—Mazda service literature calls it the SAS Unit (part of the Supplemental Restraint System)—records a crash event and locks itself. This is a safety feature: the module preserves evidence of deployment and prevents reuse until the event memory is professionally cleared. The side effect is that even after you replace damaged components, the airbag light stays on and the module refuses to clear certain DTCs because that crash data is stored in non‑volatile memory.

How this shows up for you

• The airbag/ SRS lamp stays illuminated after repairs.

• Clearing codes works temporarily—or not at all—and they return on the next key cycle.

• Your scan tool reports crash storage is full/locked.

What actually fixes it

Replacing the entire control unit is often unnecessary and expensive. The correct remedy is to reset your original SAS Unit—clearing the crash/event memory while keeping your vehicle’s existing configuration intact. That’s precisely what UpFix does: you ship your locked unit, we clear crash data on the bench, function‑test the module, and send it back ready to reinstall—typically plug‑and‑play once all external SRS faults are resolved.

Send your KEAD57K30 SAS Unit to UpFix for a professional reset now. We clear crash/event storage and return your same module tested and ready

Common Mazda Crash DTCs for a Locked SAS Unit

You’ll often see one or more of the following DTCs when the crash memory is latched:

Important: If these codes return immediately after clearing or after a key cycle (even with no other sensor faults present), the module is still locked and requires an on‑bench reset service.

Fitment & Interchange

Vehicle coverage: Mazda CX‑5 2022–2025 (all trims).
Primary part number: KEAD57K30
Mazda terminology: SAS Unit (a.k.a. Airbag Control Module, SRS Control Module, RCM/SDM in other makes).

Supersession list (treated as equivalent for service):

How to confirm your part number: Remove the module and read the white label. If it shows KEAD57K30 or any supersession above, this service applies. Avoid mixing CX‑5 units with CX‑50/CX‑60 families—they have different part families and calibrations.

What This Service Does (and Doesn’t)

This service does:

• Clear crash/event storage from the SAS Unit’s non‑volatile memory

• Preserve your vehicle’s existing configuration (we do not alter calibrations)

• Bench‑test key functions after reset

• Return your same unit ready for reinstallation (plug‑and‑play in most cases)

This service does not:

• Repair external SRS components (airbags, pretensioners, impact sensors, clockspring)

• Bypass active wiring/sensor faults

• Reverse severe water/fire/impact damage to the module housing or board

• Change VIN or coding values—our process targets crash/event memory only

Safety First: Never drive with SRS warnings active. Fix external faults first, then reset the module to restore SRS readiness.

Why UpFix

• Specialized Mazda expertise with KEAD57K30-family modules

• Safety‑first process focused on restoring designed SRS behavior

• Plug‑and‑play outcome in most cases—no dealer programming trips

• Cost‑effective vs. new unit replacement

• Clear communication and packaging guidance from start to finish

Our Process

1. Order the service (SKU 48906) and print your order/packing slip.

2. Remove the SAS Unit (see the detailed guide below). Disconnect the battery and follow all airbag handling precautions.

3. Ship the module to UpFix. Use antistatic protection; pad all sides; keep loose hardware out of the box.

4. Reset & Test: We clear crash data on the bench and verify functionality.

5. Return & Reinstall: Reinstall the module, clear any remaining non‑crash DTCs, and perform a key‑cycle verification.

Pre‑Shipment Checklist

• ✅ Label matches KEAD57K30 or listed supersessions

• ✅ No visible board corrosion/soot or cracked housing

• ✅ All external SRS components replaced/repaired as needed

• ✅ Contact details and return address included in the box

Post‑Install Quick Verification

1. Reconnect battery and cycle ignition OFF → ON without cranking.

2. Confirm the SRS lamp illuminates then extinguishes after bulb check.

3. Scan for codes. Address any remaining component DTCs separately (they are unrelated to crash memory).

Case Study #1 — 2023 Mazda CX‑5 (Touring)

• Symptoms: SRS light on after collision repair; codes B1206:00-08 and B1A55:00-08 persisted after dealer-level clear.

• Action: Customer mailed in KEAD57K30A unit (supersession of KEAD57K30).

• Result: Crash data cleared; module reinstalled plug‑and‑play; SRS lamp off after key cycle; no additional programming required.

How To Remove the SAS Unit (Quick Guide)

• Disconnect the 12V battery (negative cable first) and wait the OEM‑specified interval before working on SRS components.

• The SAS Unit is typically mounted on the center tunnel under the console. Remove trim carefully; protect clips to avoid rattles.

• Photograph the connectors before unplugging; depress locks—do not pry on terminals.

• Keep the label intact for part number verification.

• Store the module in antistatic packaging with padding; avoid moisture and magnetic sources.

Always follow Mazda workshop safety procedures and torque specs during removal/installation.

FAQs

Will a scan tool clear these crash codes?
Not permanently. Crash data is stored in non‑volatile memory; clears usually fail or the codes return on the next key cycle.

Do I need to reprogram the module after your reset?
In most cases, no. Because it’s your original unit matched to the vehicle, it’s typically plug‑and‑play once external faults are fixed.

What if the airbag light is still on after reinstall?
Scan for new or remaining faults. Sensors, pretensioners, clockspring, or wiring issues will set their own DTCs that must be resolved.

Will this service fix pretensioner or airbag circuit codes?
No. Those indicate external component/wiring faults. Replace/repair the components, then clear codes.

Can you reset a water‑ or fire‑damaged unit?
Severe damage may be non‑repairable. Send photos before shipping so we can advise.

Do you change VIN or configuration when you reset it?
No. We target the crash/event memory only and do not modify VIN or calibration data.

Can I drive with the SRS light on?
We do not recommend it. Airbag and pretensioner deployment may be compromised with active SRS faults.

Case Study #2 — 2024 Mazda CX‑5 (Signature)

• Symptoms: Collision mitigation fault U2107:00-48 plus B1193:00-8B after front-end repair.

• Action: Shipped in KEAD-57-K30C (supersession).

• Result: Reset successful; all SRS-related faults cleared; system passed readiness test.

Conclusion: Restore Your Mazda’s Safety System the Right Way

Your Mazda CX‑5’s SRS is engineered to record and lock crash events—protecting occupants and preserving data—but that same safeguard leaves the system latched until the event memory is professionally cleared. Resetting your KEAD57K30 (or any listed supersession) allows you to keep the original, vehicle‑matched module, avoid unnecessary replacement costs, and restore proper SRS readiness once external faults are addressed.

When the dash light won’t go out and codes like B1A55 or B1206 keep returning, stop chasing clears. Choose the repair that aligns with Mazda’s intent for serviceability: clear the crash/event memory on the bench and verify function. That’s what we do every day.

 Send your locked KEAD57K30 SAS Unit to UpFix (SKU 48906). We’ll clear crash data, test the unit, and return it ready to reinstall—so your Mazda can protect you the way it was engineered to.