2017-2019 Kia Soul Air Bag Module: Recall, Reprogramming, and Replacement Guide

CRITICAL SAFETY RECALL: Air Bag Control Unit Failure (NHTSA Recall 22V-031)

This major recall affects 2017-2019 Kia Soul models, including gasoline and EV versions. The problem stems from a manufacturing issue where the module's metal cover can touch an internal memory chip, damaging its connections and causing an open circuit. This failure triggers the airbag warning light and stores a specific fault code: DTC B1620. If this occurs, the airbags will not deploy when needed, significantly increasing the risk of injury in an accident.

Remedy: Kia dealers will address this issue for free. If your airbag light is on and code B1620 is present, the dealer will replace the entire Air Bag Control Unit with an improved part. If the light is not on, the dealer will perform a software update on the existing module to prevent future failure. Always have a dealer check your VIN for open recalls before paying for this repair yourself.

Symptoms of a Failing Air Bag Control Module

The signs of a faulty air bag module are usually very clear, as the system performs a self-check every time you start the vehicle.

• Airbag Warning Light is On: This is the most common and definitive symptom. An illuminated or flashing SRS (Supplemental Restraint System) light on your dashboard indicates a fault within the system, and the module is a primary suspect. The system is disabled when this light is on.
• Fault Code B1620 Stored: For this specific generation of Kia Soul, the diagnostic trouble code B1620 is a direct indicator of the internal module failure covered by the recall.
• No Communication with Scan Tool: A technician may find they are unable to establish communication with the SRS module using a professional diagnostic tool. This often points to a complete internal failure of the unit.
• Unusual Electrical Problems: In some rare cases, a failing module can cause other strange electrical behavior, like flickering dash lights or random warnings, due to internal short circuits.

Diagnosing the Problem

Diagnosis must begin by scanning the vehicle's computer system for fault codes with a scanner capable of reading the SRS module. Not all basic OBD-II code readers can access this system.

1. Read Fault Codes: If code B1620 is present, the issue is almost certainly the one covered by recall SC226. Other common Kia airbag codes include B1100 (module internal failure), B1101 (configuration error), or codes related to specific sensors or airbag circuits (e.g., B1346, B1511).
2. Check Connections: Before condemning the module, a technician should inspect the wiring and connectors at the module for any signs of corrosion, damage, or looseness, especially if the vehicle has a history of water leaks. Water intrusion is a common cause of module failure.
3. Verify Power and Ground: If there is no communication with the module, the next step is to check for proper power and ground at the module's electrical connector to rule out a wiring or fuse issue.

Replacement and Programming

Replacing the air bag module is a multi-step process that requires both mechanical skill and specialized electronic tools. It is not a simple plug-and-play part.

Module Location

On the 2017-2019 Kia Soul, the Air Bag Control Module is typically located under the center console, between the two front seats. Accessing it requires removing the console trim pieces.

Replacement Overview

1. Disconnect the negative battery terminal and wait.
2. Remove the center console trim to gain access to the module.
3. Carefully disconnect the yellow electrical connectors. These connectors have special locking tabs.
4. Unbolt the module from the vehicle floor. It is typically held by three bolts.
5. Install the new module, ensuring it is bolted down securely to the correct torque. A loose module will not function correctly.
6. Reconnect the electrical connectors and reassemble the console.
7. Reconnect the battery.

CRITICAL: Module Programming (Variant Coding)

A replacement air bag module—whether new or used—must be programmed to the vehicle. This process is called "variant coding." The module needs to be told about the specific equipment in your car (e.g., number of airbags, seat belt types). Without proper coding, the system will not work and the airbag light will remain on, often with a B1101 or B1762 coding error code.

This is not a DIY job without a high-level diagnostic scan tool that supports this function. A Kia dealership or a well-equipped independent shop must perform this procedure. The process involves using the scan tool to input a 4-character code that corresponds to the vehicle's factory configuration. Ideally, this code should be read from the original module before it is removed.

Buying a Used Air Bag Control Module

Purchasing a used OEM module is a cost-effective way to repair your vehicle, especially if it is not eligible for the free recall remedy. However, there are critical details to be aware of.

• Match the Part Number Exactly: You must match the OEM part number on your original module. For the 2017-2019 Soul, the primary part numbers are 95910-B2050 and the superseding number 95910-B2600. A module with a different part number may not be compatible with your vehicle's wiring or safety components.
• Avoid Modules with "Crash Data": If a vehicle is in an accident where airbags or seatbelt pretensioners deploy, the module permanently stores "crash data." This locks the module, and it cannot be reused until it is sent to a specialized service for a reset. Standard dealer and shop tools cannot clear this hard-coded data. Always buy from a reputable recycler who guarantees the part is from a non-crashed vehicle.
• Physical Inspection: When you receive the part, inspect it for any signs of corrosion, bent pins, or physical damage. Do not install a module that has been exposed to water.
• Factor in Programming Costs: Remember that even a perfect used module will require professional programming to function in your car. Factor this cost into your budget.

Cost of Replacement

Repair costs can vary significantly based on the parts and labor source.

Frequently Asked Questions (FAQ)