Xpeng G7 airbag control unit repair

What is a Xpeng G7 airbag control unit?

The airbag control unit in the Xpeng G7 controls the entire restraint system (SRS). It evaluates the signals from the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners fire, and indicates faults via the airbag warning light.

The readings from all crash sensors come together in the control unit. If it registers an impact, it immediately determines which restraints deploy. It is fitted in the Xpeng G7 (since 2026).

Even without an accident, the SRS control unit works continuously: it constantly checks all connected components and switches on the airbag warning light in the instrument cluster if a fault occurs. After an accident it stores crash data and locks itself.

If the warning light is on, the protective function of the airbags may be restricted. Have the cause investigated rather than ignoring the indicator.

Why is the Xpeng G7 airbag control unit defective?

The most common cause is crash data stored after an accident, even if no airbag deployed; an ordinary diagnostic tool cannot erase it. Other triggers are aged electronic components, cold solder joints, corrosion and moisture at connectors, and voltage spikes.

In everyday use, a problem first shows up at the airbag warning light: it stays on permanently. Attempts to clear the fault memory are unsuccessful. Sometimes the diagnostic tool cannot even establish a connection to the control unit.

The causes mentioned above usually lie behind these symptoms. A weak battery or a jump start can produce voltage spikes that damage the electronics. Over the years, components on the circuit board age and solder joints develop fine cracks. If moisture gets into a connector, its contacts corrode and the signal drops out.

If one or more of these signs apply to your vehicle, it makes sense to have the removed unit tested.

Common error codes for Xpeng G7 airbag control unit repair

The error codes for the Xpeng G7 mainly concern loss of communication with the control unit and faults in the firing circuits of the driver airbag. Which codes are stored in your case can only be shown by reading them out with a diagnostic tool.

The following codes are known for this vehicle:

• U0151 → Communication with the control unit lost
• B16201B → Driver airbag firing circuit: resistance too high
• B0001 → Driver airbag stage 1: firing circuit control faulty
• B0002 → Driver airbag stage 2: firing circuit control faulty

The codes are read from the fault memory using a diagnostic tool. A code alone does not mean the control unit is defective, since connectors, wiring or an airbag module may equally be to blame. Only testing shows which part is affected.

What part numbers are available for the Xpeng G7 airbag control unit repair?

You will find the part number on the label of the control unit; it defines the exact version. Depending on equipment and year of manufacture, there are different numbers within one model series, so read the number off before sending the unit in.

After removal, note the number from the label and enter it in the repair order. On the basis of this information, Airbag24 assigns your unit to the matching version.

Whether the unit is actually defective is only clarified by reading out the fault memory or by testing. Here is how to proceed: first have the fault memory read out, then disconnect the battery and remove the control unit. Next, create a repair order online and send the unit in. Testing, repairing and checking usually take 3–4 working days at Airbag24.

The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.