BYD Seal 6 1st generation Touring airbag control unit repair

What is a BYD Seal 6 1st generation Touring airbag control unit?

The airbag control unit in the BYD Seal 6 1st generation Touring is the central control unit of the restraint system (SRS). It monitors the system continuously, evaluates the signals from the crash sensors in an accident and triggers the appropriate airbags and seatbelt pretensioners within milliseconds.

In everyday use you will not notice any of this: each time the engine is started, the control unit runs a self-test, checks sensors, squib circuits and wiring, and lets the airbag warning light come on briefly. If it goes out afterwards, the system is ready. The control unit is fitted in the BYD Seal 6 1st generation Touring (since 2025).

If it finds a fault, it reports it via this warning light and stores it in the fault memory. In an emergency it then decides which restraint devices deploy. After an accident it stores crash data and locks itself.

Why is the BYD Seal 6 1st generation Touring airbag control unit defective?

The most common cause is crash data stored after an accident, even if no airbag deployed. Ageing electronic components, cold solder joints, moisture and corrosion on connectors, as well as voltage spikes, are also possible causes of a defective BYD Seal 6 1st generation Touring airbag control unit.

Stored crash data cannot be cleared with an ordinary diagnostic tool.

Voltage spikes arise, for example, from a weak battery or when jump-starting. Over the years, components on the circuit board also age, solder joints become brittle, and moisture attacks contacts. Such faults often develop gradually and at first appear only sporadically.

Typical signs are a permanently lit airbag warning light, a fault memory that cannot be cleared, or a diagnostic tool that cannot connect to the control unit.

Common error codes for BYD Seal 6 1st generation Touring airbag control unit repair

The error codes for the BYD Seal 6 1st generation Touring airbag control unit indicate different types of fault: communication faults, internal control unit faults, power supply problems, squib circuits and stored crash data.

The following list shows codes that are known for this vehicle, each with a short meaning.

• B16AE00 → Fault in the SRS control unit
• B17A000 → Internal control unit fault
• B17A200 → Crash recording is locked
• B17A600 → Frontal impact detected and stored
• B17A800 → CAN bus communication interrupted
• B1694 → Supply voltage too low
• B1695 → Supply voltage too high
• B1600 → Driver front airbag not connected

Error codes are read out with a diagnostic tool. A code alone does not prove that the control unit is defective: connectors, wiring or an airbag module can also be the cause. Only the inspection shows where the fault actually lies.

What part numbers are available for the BYD Seal 6 1st generation Touring airbag control unit repair?

The part number of your BYD Seal 6 1st generation Touring airbag control unit is printed on the unit's label. It determines the exact version, because within a model series there are different numbers depending on equipment and year of manufacture.

After removal, read the number from the label and enter it in the repair order. This makes it clear which unit it is.

Whether your unit is defective is not determined by the number, but only by reading out the fault memory or by the inspection.

First have the fault memory read out. Then disconnect the battery, remove the control unit and create a repair order online. Then send in the unit. Processing at Airbag24, including inspection, repair and testing, usually takes 3–4 working days.

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.