No, not every car can get OnStar. OnStar is a telematics system that is primarily a GM factory-installed feature on new vehicles from brands like Chevrolet, Buick, GMC, and Cadillac. It's deeply integrated into the vehicle's electronics during manufacturing. For cars not built with OnStar, your options are limited to a discontinued aftermarket mirror unit or exploring competing services.
The core reason is system integration. A true OnStar system requires a specific hardware module, a vehicle communications bus interface, and embedded antennas that are designed into the car from the start. This allows it to perform critical functions like crash response, where it can pull data from airbag sensors, or remote commands that require a direct link to the door locks and starter.
For a brief period, OnStar offered an aftermarket solution called the OnStar FMV (For My Vehicle) mirror. This device provided some core services like emergency calling and vehicle diagnostics through a self-contained unit. However, GM discontinued sales of new FMV mirrors in 2022. If you find a used one, service activation may no longer be possible.
For non-GM vehicle owners, the better path is to look at modern alternatives. Many independent companies offer aftermarket telematics systems that provide similar features like GPS tracking, remote start, and roadside assistance. Additionally, some car manufacturers have their own subscription services, such as Toyota's Safety Connect or Hyundai's Bluelink.
| Vehicle Type | OnStar Compatibility | Primary Method | Key Considerations |
|---|
| New GM Vehicle | Yes | Factory Installation | Standard on most trims; requires subscription after trial. |
| Used GM Vehicle | Yes | Already Installed | Can reactivate service if hardware is functional. |
| Non-GM Vehicle | No (Effectively) | Aftermarket Mirror (Discontinued) | Service activation for old units is unlikely. |
| Any Vehicle | No | Third-Party Alternatives | Systems from brands like Viper or Compustar offer similar features. |
The bottom line is that if OnStar is a must-have, purchasing a new or used GM vehicle is the only reliable way to get it.
