Airbag control unit with part number 4896058AC

What is the function of Airbag Control Unit 4896058AC?

The airbag control unit with part number 4896058AC is the original Mopar Occupant Restraint Module (ORM), serving as the central control unit for the passive safety system in the Dodge Grand Caravan. It analyzes signals from crash sensors and, in the event of a collision, activates critical components such as airbags and seatbelt pretensioners.

This component is essential for occupant safety. It processes data from acceleration and pressure sensors within milliseconds to assess the severity of an impact. Based on this analysis, the control unit determines which restraint systems need to be deployed to provide optimal protection for passengers.

A malfunction or failure of this module inevitably disables the entire airbag system. In this state, the vehicle is no longer roadworthy, as the passive safety devices would fail to deploy during a crash.

Why does Control Unit 4896058AC fail?

The most common cause of failure for Control Unit 4896058AC is the storage of crash data after an accident. Other defects stem from internal hardware issues—particularly in the memory area—as well as external factors such as water damage or age-related wear of electronic components.

Following a crash, the unit permanently stores crash-event data and locks itself to prevent reuse without professional diagnostics. This condition is often indicated by error code B120C (memory overflow), making repair unavoidable.

In addition, specific electronic faults may appear, signaled by diagnostic codes. These include communication errors (B1000), internal non-volatile memory failures (B1010), power supply problems (B1020), or general hardware defects (B1100) that point to physical damage to circuit board components.

Corrupted software or calibration data, indicated by error code B1120, can also impair functionality. Such issues frequently result from voltage spikes or aging of memory chips.

How do you recognize a defect in 4896058AC?

The clearest symptom of a fault in Airbag Control Unit 4896058AC is a continuously illuminated or flashing SRS airbag warning light on the instrument cluster. This indicates a malfunction in the safety system and its complete deactivation, meaning airbags will not deploy in the event of a crash.

The warning light does not extinguish upon starting the vehicle as usual but remains active. This is a critical alert requiring immediate inspection at a specialized workshop, as driving safety is significantly compromised.

In some cases, the control unit may also become unresponsive via the OBD interface. Diagnostic tools then cannot establish communication or read any error codes—or only generic ones—suggesting a severe internal defect.

In which vehicles is 4896058AC installed?

Part number 4896058AC is specifically used across various generations of the Dodge Grand Caravan. At Airbag24, we professionally repair this control unit for all affected model years, restoring full functionality to the safety system.

At Airbag24, we offer repairs for Airbag Control Unit 4896058AC on the following Dodge models:

Dodge Grand Caravan, 2nd Generation (1991–1995)

Dodge Grand Caravan, 3rd Generation (1996–2000)

Dodge Grand Caravan, 4th Generation (2001–2007)

How does the repair of 4896058AC proceed at Airbag24?

At Airbag24, repairs follow a systematic process that begins with the submission of the removed, unopened control unit. Our technicians perform a precise diagnosis, resolve the root cause by erasing crash data or replacing defective components, and conclude with a functional test. We provide a 12-month warranty on every repair.

After placing your repair order online, please send us the unit—ideally well-padded. It is crucial that the control unit arrives unopened, as prior repair attempts can reduce the chances of success and void your warranty claim.

Our technicians analyze potential failure sources at the component level. Stored crash data is professionally reset, and defective parts such as memory chips or processors are replaced with genuine OEM components. Finally, the control unit undergoes testing on a dedicated test bench to verify proper operation of all systems.

After successful repair and testing, the control unit will be shipped back to you. Reinstallation is usually straightforward (plug-and-play), and the airbag warning light in your vehicle should be off.

What shipping options does Airbag24 offer?

To ensure a smooth process, Airbag24 provides several shipping options. You can return the control unit yourself at no cost or arrange a convenient UPS pickup. For the return shipment, you have free standard UPS shipping, faster express shipping, and cash-on-delivery options available.

For the outbound shipment, you can either send the package to us yourself or use our convenient UPS pickup service, which collects the package directly from your preferred location.

When returning the repaired unit, we offer maximum flexibility. Standard UPS shipping is free of charge. If you need the part returned more quickly, you can opt for UPS Express shipping; both options are also available with cash-on-delivery. Alternatively, you can pick up the repaired control unit in person at our facility.