Airbag control unit with part number 31295241

What is the function of Airbag Control Unit 31295241?

The airbag control unit with part number 31295241 is the central control module of the occupant protection system (SRS) in Volvo models such as the XC60 on the SPA platform. It continuously analyzes data from acceleration and seatbelt force sensors to precisely and rapidly deploy airbags and pretensioners in the event of a crash.

As an SRS ECU (Supplemental Restraint System Electronic Control Unit), this module is responsible for monitoring all safety‑related components of the restraint system. It ensures communication between sensors, actuators (airbags, seatbelt pretensioners), and the vehicle’s electrical network, while also storing all system‑relevant events and fault codes. Perplexity analysis indicates that this component is manufactured by Bosch and is also known under part number 0285012268.

Why does control unit 31295241 fail, and what are typical defects?

The most common reason for repairing control unit 31295241 is stored crash data following an accident that cannot be cleared using standard diagnostic tools. Other typical defects include internal hardware failures that result in loss of communication or a permanently illuminated SRS warning light.

A key issue is stored crash data. After airbags have deployed, the control unit internally locks to prevent unintended re‑activation. This lock can only be released through direct intervention on the memory chip (EEPROM/Flash).

In addition, specific internal hardware faults occur. Fault codes such as U200B indicate a problem with the internal power supply, while U3000 signals a generic control unit failure. Communication errors on the CAN or LIN bus—signaled by codes like SRS-00D5 or SRS-U014000—are likewise attributable to defective components on the circuit board.

External factors contributing to these failures include undervoltage caused by a weak battery, short circuits in the vehicle’s electrical system, cable breaks, or moisture ingress, especially when the unit is mounted beneath a seat. Several related part numbers exist, such as P32315584, P31318792, or P31406637, making compatibility verification via the Vehicle Identification Number (VIN) essential.

How do you recognize a defect in Airbag Control Unit 31295241?

A defective Airbag Control Unit 31295241 primarily manifests as a persistently illuminated airbag or SRS warning light in the instrument cluster. Another telltale sign is the lack of communication with the control unit when a workshop attempts to read or clear the fault memory.

The most obvious symptom is the constantly lit SRS indicator light, which fails to extinguish after starting the engine—indicating a serious, stored error within the system.

Often, the control unit becomes inaccessible via the OBD interface. Diagnostic tools receive no response, making precise fault analysis at the workshop impossible. This frequently occurs after an accident when crash data has been saved.

If fault codes such as U200B (internal power supply error), U3000 (internal control unit error), or communication errors (e.g., SRS-U014000) are detected, this strongly suggests a defect directly within the module itself rather than in peripheral sensors.

In which vehicles is control unit 31295241 installed?

The airbag control unit with part number 31295241 is specifically used in modern Volvo models based on the SPA platform (Scalable Product Architecture). Repairing this particular module is a core competency of Airbag24, especially for the affected SUV series.

At Airbag24, we repair control unit 31295241 for the following models:

Volvo XC60 SPA (model years 2017–2021)

Volvo XC60 SPA Facelift (model years 2021 onward)

Due to the large number of related part numbers (e.g., P32315584, P31318792), it is always recommended to verify exact identification and compatibility by cross-referencing the Vehicle Identification Number (FIN/VIN).

How is control unit 31295241 professionally repaired?

Repair of control unit 31295241 at Airbag24 involves thorough electronic diagnostics, hardware restoration through replacement of faulty components, and professional clearing of crash data. Each repair concludes with a final functional test and a 12‑month warranty.

After submission to Airbag24, repairs follow a standardized, quality‑assured process. First comes an initial inspection, during which the unit is examined for visible damage (e.g., moisture) and its internal fault memory is read out.

In the next step, electronic repair takes place. Technicians replace defective components such as voltage regulators, capacitors, or MOSFETs according to the manufacturer’s specifications, rework cold solder joints, and repair damaged traces.

Once the hardware is restored to full working order, crash data stored in memory is carefully erased using specialized equipment. This process unlocks the control unit, restoring it to full functionality. If necessary, the software configuration is matched to the vehicle’s VIN.

Before reshipment, the module is thoroughly tested for communication capability and proper operation. Airbag24 provides a 12-month warranty on the entire repair service.

What shipping options does Airbag24 offer?

Airbag24 offers flexible and secure shipping options for your control unit. You can either send the package yourself at no cost or arrange a convenient UPS pickup at your preferred location. Return shipping is available either via free standard UPS delivery or faster express service, depending on your preference.

For outbound shipping, you have two choices: send the securely packaged control unit yourself or use the UPS pickup service directly at your location.

For return shipping after successful repair, the following options are available:

Free standard UPS shipping (1–3 business days)

UPS express shipping (1–2 business days)

UPS standard shipping with cash-on-delivery (1–3 business days)

UPS express shipping with cash-on-delivery (1–2 business days)

Self-collection at our premises.