Kia PV5 1st generation airbag control unit repair

What is a Kia PV5 1st generation airbag control unit?

The airbag control unit in the Kia PV5 1st generation is the central control unit of the restraint system (SRS). It connects the crash sensors to the airbags and seatbelt pretensioners and decides within milliseconds, in an accident, what deploys.

The sensors report acceleration and impact, the control unit evaluates these signals and activates the appropriate restraint devices. Which airbags and seatbelt pretensioners respond depends on how the accident unfolds and on the vehicle's equipment. So that this works reliably in an emergency, the control unit also constantly checks its own functions and the connected components. The control unit is fitted in the Kia PV5 1st generation (since 2025).

It also monitors the system continuously and reports faults via the airbag warning light. After an accident, the control unit stores crash data and locks itself.

Why is the Kia PV5 1st generation airbag control unit defective?

The most common cause is an accident: the airbag control unit stores crash data, even if no airbag has deployed, and this cannot be cleared with an ordinary diagnostic tool. Ageing electronic components, cold solder joints, moisture and corrosion at the connectors, and voltage spikes are also possible causes.

In the Kia PV5 1st generation, a fault usually shows itself in the airbag warning light staying on permanently. Often the fault memory cannot be cleared, or the diagnostic tool cannot connect to the control unit at all.

Voltage spikes occur, for example, with a weak battery or when jump-starting. Electronic components also age over the years, and solder joints can become brittle through temperature changes and vibration. Moisture that reaches the connectors leads over time to corrosion and thus to contact resistance.

Common error codes for Kia PV5 1st generation airbag control unit repair

The error codes on the Kia PV5 1st generation point to internal control unit faults, stored crash data, loss of communication and problems with the supply voltage. The pattern of the codes gives a first indication of the type of fault. They can be roughly divided into faults of the control unit itself, the power supply, the connection to other control units and stored accident events.

These codes are known:

• B1620 → Internal SRS control unit fault
• B1684 → Internal control unit fault
• B1650 → Frontal impact stored in control unit
• B1651 → Driver-side impact stored in control unit
• B1652 → Passenger-side impact stored in control unit
• U0151 → Communication with the control unit lost
• B1101 → Supply voltage too high
• B1102 → Supply voltage too low

Error codes are read out with a diagnostic tool. A code alone does not show with certainty that the control unit is defective, because connectors, wiring or an airbag module can also be the cause. Only an inspection will clarify this.

What part numbers are available for the Kia PV5 1st generation airbag control unit repair?

The part number is on the label of the control unit and defines the exact version. Within a model series there are different numbers depending on equipment and year of manufacture, so please enter it in the repair order.

There is no list of known part numbers for the Kia PV5 1st generation yet. Simply read the number from the label of your removed unit and enter it when you create the repair order.

The procedure: have the fault memory read out, disconnect the battery, remove the control unit. Then create the repair order online and send in the unit. At Airbag24, processing usually takes 3–4 working days, during which the unit is inspected, repaired and tested.

You get your own unit back. 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.