Airbag control unit with part number 77960-TK8-D010-M1

What is the function of Airbag Control Unit 77960-TK8-D010-M1?

The airbag control unit with part number 77960-TK8-D010-M1 is the central control unit (SRS ECU) for the occupant protection system of the second-generation Honda Odyssey (1999–2003). It continuously analyzes data from crash sensors and is responsible for precisely deploying airbags and seatbelt pretensioners in the event of a collision.

As the “brain” of the safety system, this control unit processes signals from acceleration and yaw rate sensors to determine the severity and type of a collision. Based on this analysis, it decides within milliseconds which restraint systems need to be activated to maximize occupant protection.

The proper functioning of this module is critical for vehicle safety, as it coordinates the entire sequence—from accident detection to activation of airbags and seatbelt pretensioners.

Why does control unit 77960-TK8-D010-M1 fail?

Failures in control unit 77960-TK8-D010-M1 typically arise from internal electronic faults that occur independently of an accident. Common causes include aging components, moisture ingress, or vibrations. A typical symptom is the non‑erasable error code 91-2, indicating an internal issue within the safety circuitry.

The control unit’s electronics are subjected over time to stresses such as temperature fluctuations and mechanical vibration. These conditions can lead to defects in critical components like capacitors, resistors, or even the microcontroller, resulting in total failure or sporadic malfunctions.

Another frequent cause is the storage of crash data after an accident. In such cases, the control unit becomes permanently locked and reports an error—even if the vehicle has been repaired. Professional reset procedures are required to restore full functionality.

The specific error code 91-2 is a clear indicator of an internal ECU fault, pointing to problems with internal sensors or safety circuits that necessitate component‑level repair.

This control unit is also known under the variant spelling 77960TK8D010M1 (without hyphens). In some systems, the compatible part number 150300-3302 is referenced as well.

How do you recognize a defect in 77960-TK8-D010-M1?

A defect in control unit 77960-TK8-D010-M1 primarily manifests as a constantly illuminated or intermittently flashing airbag warning light on the instrument cluster. Often, stored error codes cannot be cleared, or communication between the diagnostic tool and the control unit breaks down entirely.

The most obvious sign is the active airbag warning light, which indicates a fault in the safety system and remains lit even after restarting the vehicle—making a successful TÜV inspection impossible.

Another typical symptom is communication failure: the workshop can no longer access the airbag control unit via the diagnostic tool to read or erase errors. The unit simply stops responding to requests through the OBD interface.

Even when a connection is established, certain error codes may remain stored and refuse to reset, suggesting a permanent internal hardware defect that prevents simple software clearing.

In which vehicles is control unit 77960-TK8-D010-M1 installed?

The airbag control unit with part number 77960-TK8-D010-M1 was specifically developed for one vehicle generation. It is exclusively used in the second-generation Honda Odyssey, produced from 1999 to 2003. It is generally not intended for other models.

At Airbag24, we service part number 77960-TK8-D010-M1 for the following model:

Honda: Odyssey, Second Generation (1999–2003)

Although this unit is vehicle‑specific, the underlying process for resetting stored crash data is often similar across many Honda control units. However, repairing hardware defects requires precise knowledge of this particular model.

How is control unit 77960-TK8-D010-M1 professionally repaired?

Repairing control unit 77960-TK8-D010-M1 is a purely electronic process. After sending the unit to Airbag24, it undergoes thorough analysis, stored crash data is erased, defective electronic components such as capacitors or processors are replaced, and the software is reinstalled. The repaired unit functions just like a brand‑new part.

As a first step, if possible, the fault memory should be read out to narrow down the nature of the defect. Subsequently, the control unit is carefully removed from the vehicle and securely packaged for shipment to us.

At Airbag24, a detailed incoming inspection is performed in our test environment. Our technicians identify the exact cause of the fault, whether it’s a pure crash‑related error code or a defect on the circuit board.

The repair includes professionally resetting the internal memory and replacing all defective components. Following the repair, the control unit undergoes comprehensive testing to ensure full functionality.

After refurbishment, the control unit can be reinstalled in the vehicle (plug-and-play); no complex re‑coding is required. We provide a 12‑month warranty on all repairs.

What shipping options are available?

To send your control unit to Airbag24, you can either ship it yourself free of charge or arrange a convenient UPS pickup. For returning the repaired unit, we offer free standard UPS shipping as well as faster express options. Cash on delivery and self‑pickup are also available.

For sending the unit to us, you have two options: you can ship the package yourself at no cost, or use the paid UPS pickup service, which collects the package from a location of your choice.

Once the repair is successfully completed, the unit will be shipped back to you. You can choose between free standard UPS shipping (1–3 business days) and faster UPS Express shipping (1–2 business days).

Both shipping methods are also available with cash on delivery. Alternatively, upon prior arrangement, you can pick up the repaired control unit directly from our premises.