Lamborghini Murciélago Coupé airbag control unit repair

What is a Lamborghini Murciélago Coupé airbag control unit?

As soon as you switch on the ignition, the airbag control unit in the Lamborghini Murciélago Coupé runs a self-test, and the airbag warning light goes out after the check. As the central control unit of the restraint system (SRS), it evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners deploy.

While driving, too, the unit continuously monitors the sensors, firing circuits and its own electronics. If it detects a fault, it switches on the warning light in the instrument cluster and stores the entry in the fault memory.

The control unit is fitted in the Lamborghini Murciélago Coupé (2001 to 2006). After an accident it stores crash data and locks itself.

Why is the Lamborghini Murciélago Coupé airbag control unit defective?

The most common cause is crash data that remains in memory after an accident, even if no airbag deployed. Ageing electronic components, cold solder joints, moisture and corrosion on connectors, or voltage spikes may also be responsible.

A standard diagnostic tool cannot remove stored crash data. That is why the warning light stays on even though the vehicle has long since been repaired.

Other triggers develop gradually: components age, solder joints crack, corrosion builds up on the connectors, especially in damp conditions. Voltage spikes, for example from a weak battery or after a jump start, can also damage the electronics.

You can usually recognise a faulty unit by the airbag warning light staying on permanently, the fault memory not being clearable, or the diagnostic tool failing to connect.

Common error codes for Lamborghini Murciélago Coupé airbag control unit repair

The codes point to different areas of the restraint system: internal faults of the control unit, firing circuits, the data line of a sensor, or crash data that has already been stored.

These codes occur in the Lamborghini Murciélago Coupé, among others:

• 01 → Internal control unit fault, shown via flash code
• B1139 → Fault within the SRS control unit
• B1649 → Crash detected, stored in the control unit
• B1650 → Crash detected, stored in the control unit
• 05 → Fault in the firing circuit of the seatbelt pretensioner or front passenger airbag
• 15 → Incorrect vehicle identification, internal fault or sensor data line

Codes are read out with a diagnostic tool. However, a code alone does not reliably show that the control unit itself is faulty, as connectors, wiring or an airbag module may equally be the cause. Only the inspection provides clarity.

It helps if you send in the read-out report from your workshop together with the unit. During the inspection, the cause of the fault can then be searched for in a targeted way.

What part numbers are available for the Lamborghini Murciélago Coupé airbag control unit repair?

You will find the part number on the label of the control unit. It determines the exact version, because depending on equipment and year of manufacture there are different numbers within one model series.

These part numbers are known for the Lamborghini Murciélago Coupé; the list is not necessarily complete:

• 410959655

Compare the number on your unit with the list. This only confirms that you have the matching unit in front of you. Whether it is actually faulty only becomes clear by reading out the fault memory or through the inspection.

The route to repair: first have the fault memory read out, then disconnect the battery and remove the control unit. Then create a repair order online and send the unit in. Checking, repairing and testing 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.