--- title: 2021–2025 Mazda CX‑50 SAS Unit Reset – VA4057K30 | MyAirbags description: MyAirbags resets Mazda CX-50 VA4057K30 SAS Unit (2021–2025). Clear crash DTCs B1A55/B1206 and restore SRS. Order SKU 48906. image: https://blog.myairbags.com/hubfs/Firefly_Gemini%20Flash_picture%20of%20a%20Mazda%20Cx-50%20Driving%20(do%20research%20on%20how%20the%20Mazda%20looks)%20on%20Atlanta%20high%20945356-1.png --- [![](https://blog.myairbags.com/hubfs/logo-1.jpg)](https://www.myairbags.com/) [![](https://blog.myairbags.com/hubfs/web.png)myairbags.com](https://www.myairbags.com/) [![](https://blog.myairbags.com/hubfs/phone.png)888-779-9029](tel:888-979-9343) - - - [SRS Module](https://blog.myairbags.com/tag/srs-module) # 2021–2025 Mazda CX‑50 SAS Unit Reset – VA4057K30 | MyAirbags 20 November 2025 Last updated: November 25 2025 ![Mazda CX-50](https://blog.myairbags.com/hubfs/Firefly_Gemini%20Flash_picture%20of%20a%20Mazda%20Cx-50%20Driving%20(do%20research%20on%20how%20the%20Mazda%20looks)%20on%20Atlanta%20high%20945356-1.png) Airbag light still on after collision repairs? That doesn’t always mean a bad sensor—your Mazda can lock crash data inside the SAS Unit and keep the warning active. Here’s what that means, how it affects your CX‑50, and how MyAirbags clears the locked memory so your SRS initializes correctly. ![Mazda CX-50 2.5 Turbo Meridian Edition](https://blog.myairbags.com/hubfs/Firefly_Gemini%20Flash_picture%20of%20a%20Mazda%20Cx-50%20%20178027.png)     **Brand:** MyAirbags **SKU: INV19138**— Locked Airbag Module Reset **Module Name (Mazda):** SRS **SAS Unit** (Supplemental Restraint System / Airbag Control Module) **Vehicles:** Mazda CX‑50 (2021, 2022, 2023, 2024, 2025) **Primary Part #:** **VA4057K30** **Supersessions:** **VA40‑57‑K30**   # Why the Airbag Light Stays On After Repairs (and How MyAirbags Fixes It The Mazda CX‑50’s Supplemental Restraint System is designed to protect you during a collision—and to protect itself afterward. When the vehicle detects a crash or a severe impact, the **SAS Unit** (airbag control module) records the event and **locks**. That lock preserves critical crash data for diagnostics, but it also leaves the **airbag light on** even after you’ve replaced or repaired physical components like **airbags, seatbelt pretensioners, and sensors**. Clearing codes with a scan tool usually fails because the crash record is stored in **non‑volatile memory**. **MyAirbags** solves this last mile of the repair by **resetting your original VA4057K30 SAS Unit** (and its supersessions). You ship your module under **SKU 48906**, we **clear crash/event memory**, **bench‑test** the unit, and return **your same module** ready to reinstall—typically **plug‑and‑play** once any external SRS issues are addressed. If you still need **airbag replacements** or **seatbelt pretensioner repair**, those are **separate MyAirbags services**—this page focuses on the **module reset**. > [Order SKU INV19138 and send your VA4057K30 SAS Unit to MyAirbags](https://www.myairbags.com/search/?q=cx-5+&s=?utm_medium=organic_social&utm_source=blog&utm_campaign=blog_post_series&utm_content=https://www.myairbags.com/product/mazda-cx-5-srs-sas-airbag-control-module-reset/-CTA-2-Christian-Cx-50) for a professional crash‑data reset and bench test.   # What the SAS Unit Does (and Where It’s Located) - **Monitors** impact sensors, seat occupancy, airbags, and pretensioners. - **Commands** deployment when thresholds are met; **logs** crash events for diagnostics. - **Stores** DTCs and crash data in non‑volatile memory; ordinary clears **won’t remove** a locked crash record. - **Typical location:** **center tunnel under the console** (location may vary slightly by trim). - **Connectors:** Multi‑pin with locking tabs—**do not pry** on terminals. > **Safety Note:** Disconnect the **12V battery** and wait the Mazda‑specified interval before working on any SRS component. # Service highlights - **SKU  [INV19138](https://www.myairbags.com/product/mazda-cx-50-sas-unit-sophisticated-airbag-sensor-airbag-computer-control-module-part-va4057k30/?utm_medium=organic_social&utm_source=blog&utm_campaign=blog_post_series&utm_content=https://www.myairbags.com/product/mazda-cx-50-sas-unit-sophisticated-airbag-sensor-airbag-computer-control-module-part-va4057k30/-CTA1-Christian-CX-50) -**  Locked Airbag Module Reset - **Starting price:** $49.99\* - **Turnaround:** most jobs completed in **24 hours**\* - **OEM programming maintained:** typically plug‑and‑play after reinstall - **Keep your original module:** avoid dealer coding costs \*Pricing/turnaround commonly shown on MyAirbags service pages; can vary by workload and shipping. --- ## Symptoms & DTCs of a Locked VA4057K30 Module If crash memory is latched, you’ll typically see the SRS lamp on and one or more of these Diagnostic Trouble Codes: | Code | Meaning | Typical Context | | --- | --- | --- | | **B1A55:00‑08** | Crash record output | Appears post‑collision or after failed clear attempts; confirms stored crash record | | **B1206:00‑08** | Crash event storage full and locked | Returns immediately after clearing; storage is latched | | **B1206:00‑09** | Crash event storage full and locked | Variant of the above; same remedy | | **B1193:00‑8B** | Crash event storage full and locked | Common with multi‑event logs or front‑end impacts | | **U2107:00‑48** | Collision mitigation by braking | Often present alongside crash memory; clears after reset if no active sensor faults | **Signal to act:** If these codes **reappear immediately** after clearing or on the next key cycle—and airbags, belts, and sensors are already addressed—the module is still **locked** and needs a bench reset. # Fitment & Interchange **Vehicle coverage:** Mazda CX‑50 **2021–2025** (all trims) **Primary part number:** **VA4057K30** **Mazda terminology:** SAS Unit (also called Airbag Control Module / SRS Control Module; equivalent to RCM/SDM in other brands) **Supersessions treated as equivalent for this reset:** | Primary | Recognized Supersessions | | --- | --- | | **VA4057K30** | **VA40‑57‑K30** | > **Confirm fitment:** Read the white label. If it shows **VA4057K30** or **VA40‑57‑K30**, this service applies. Do not mix with other families (e.g., **VA6057K30**)—calibrations differ. # Service Scope — What’s Included (and What Isn’t) **This reset service includes:** - Clearing **crash/event memory** from the SAS Unit’s non‑volatile storage - Preserving your vehicle’s configuration (we **do not** alter VIN or calibrations) - **Bench testing** key functions after reset - Returning **your same unit** ready to reinstall (plug‑and‑play in most cases) **This reset service does not include:** - Repairing external SRS components (airbags, pretensioners, sensors, clockspring, wiring) - Undoing severe water/fire/impact damage to the module - Bypassing active component or wiring faults - Programming a used module from another vehicle > Need **airbags** or **seatbelt pretensioner** repair? MyAirbags provides those as **separate services**—order alongside this reset if needed. # Step‑by‑Step: How MyAirbags Handles Your Module 1. **Order** SKU **[INV19138](https://www.myairbags.com/product/mazda-cx-50-sas-unit-sophisticated-airbag-sensor-airbag-computer-control-module-part-va4057k30/?utm_medium=organic_social&utm_source=blog&utm_campaign=blog_post_series&utm_content=https://www.myairbags.com/product/mazda-cx-50-sas-unit-sophisticated-airbag-sensor-airbag-computer-control-module-part-va4057k30/-CTA1-Christian-CX-50)** and print your packing slip/RMA. 2. **Remove** the SAS Unit (see the quick guide below). Disconnect battery; follow SRS precautions. 3. **Package** the module: antistatic bag + foam; pad all six sides; no loose hardware. 4. **Ship** to **MyAirbags** with your contact info and return address in the box. 5. **Reset & Test:** We clear crash memory and bench‑test the unit. 6. **Return & Reinstall:** Reinstall, clear any non‑crash DTCs, and verify the SRS lamp cycles off. ![airbag control module](https://blog.myairbags.com/hubfs/image2-1.jpeg) # Packaging Tips (Prevent Transit Damage) - Use a **sturdy box**; immobilize the unit with foam/bubble on all sides. - Place the module in an **antistatic bag**; avoid materials that shed into connectors. - **Do not** ship bolts/screws loose in the box. - Mark the outside of the box with **SKU INV19138** for receiving. ## Quick Removal Guide (CX‑50 2021–2025) - **Disconnect the 12V battery** (negative first) and wait per Mazda service manual. - The SAS Unit is typically on the **center tunnel under the console**. - Remove trim carefully; use plastic tools to protect clips and finishes. - Photograph connectors; depress locking tabs—**no prying** on pins. - Keep the label intact for part verification. - Store flat; keep dry; avoid magnetic fields. > Always follow Mazda service procedures and torque specs during reinstallation. # Installation & Post‑Reset Verification 1. Reconnect battery; cycle ignition **OFF → ON** without cranking. 2. Confirm the SRS lamp **illuminates** and **turns off** after the bulb check. 3. Scan for codes. If any **component** DTCs remain (e.g., airbag or pretensioner circuit), resolve those separately. 4. Complete any Mazda‑specified calibrations after collision repair (e.g., occupant classification zero‑point where applicable). 5. Road‑test, re‑scan, and confirm no SRS faults return. # Troubleshooting After Reset - **Airbag or pretensioner circuit DTCs persist:** Inspect connectors, clockspring, squib wiring, grounds. - **Occupant/seat sensor faults:** Check harness; perform calibration per Mazda manual. - **Voltage‑related codes:** Verify battery/charging system and main grounds. - **Intermittent during drive:** Inspect impact sensors and harness routing for chafing or loose pins. --- ![Mazda CX-50](https://blog.myairbags.com/hubfs/Firefly_Gemini%20Flash_picture%20of%20a%20Mazda%20Cx-50%20Driving%20(do%20research%20on%20how%20the%20Mazda%20looks)%20on%20Atlanta%20high%20945356.png) # 2022 Mazda CX‑50 (Preferred) - Symptoms: SRS lamp on after repairs; B1206:00‑08 and B1A55:00‑08 reappeared after clears.   - **Action:** Customer mailed **VA40‑57‑K30** (supersession). - **Result (MyAirbags reset):** Crash memory cleared; plug‑and‑play reinstall; lamp off after bulb check; road test passed. # FAQs **Does MyAirbags handle airbags and seatbelts too?** Yes. We offer **airbag** solutions and **seatbelt pretensioner repair** as separate services. This page focuses on the **SAS Unit reset**. **Will a scan tool clear these crash codes?** Not permanently. Crash data is stored in non‑volatile memory; codes often return on the next key cycle without a bench reset. **Do I need to reprogram the module after your reset?** Usually **no**—because it’s your **original** unit matched to the car, it’s typically plug‑and‑play once external faults are addressed. **Can you reset a water‑ or fire‑damaged module?** Severe damage may be non‑repairable. Send photos before shipping so we can advise. **What if the airbag light is still on after reinstall?** Scan and resolve any remaining **component** DTCs (airbags, belts, sensors, clockspring). Those are outside the module reset scope. **Do you change my VIN or coding?** No. We clear **crash/event memory only**—we do not modify VIN or calibrations. **Can I send a used module from another car instead?** We recommend resetting **your original** module. Used units may carry incompatible configuration or crash data. **Is this service the same as “refurbished”?** No. This is your **original module**, reset and tested. **How long does the process take?** Turnaround is fast and shop‑friendly. Actual times depend on shipping and workload. **Will this fix collision‑avoidance warnings too?** If those warnings stem solely from crash memory in the SAS Unit, the reset typically clears them. Sensor/calibration issues must be handled separately. # 2023 Mazda CX‑50 (Turbo) - **Symptoms:** **U2107:00‑48** (collision mitigation) plus **B1193:00‑8B** after front‑end repair. - **Action:** Shipped **VA4057K30**. - **Result (MyAirbags reset):** Module reset and verified; SRS readiness restored; no additional programming required. # Finish the Repair the Right Way with MyAirbags The CX‑50’s SRS is engineered to **lock** the control module after a deployment. That design keeps crash data intact—but it also means the **airbag light stays on** until the event memory is professionally cleared. With **MyAirbags**, you keep your **original VA4057K30** module, avoid unnecessary replacement costs, and restore proper SRS readiness once external faults are addressed. If the dash warning persists or codes like **B1A55** and **B1206** keep returning, completing this final step is what gets the system back to normal. > [**Order SKU INV19138** and send your **VA4057K30** SAS Unit to **MyAirbags**](https://www.myairbags.com/search/?q=cx-5+&s=?utm_medium=organic_social&utm_source=blog&utm_campaign=blog_post_series&utm_content=https://www.myairbags.com/product/mazda-cx-5-srs-sas-airbag-control-module-reset/-CTA-1-Christian-Cx-50)[today.](https://www.myairbags.com/product/mazda-cx-50-sas-unit-sophisticated-airbag-sensor-airbag-computer-control-module-part-va4057k30/-CTA2-Christian-MAZDA-CX-50)We’ll clear crash data, test the unit, and return it ready to reinstall—so your Mazda’s safety system works the way it was designed to. 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