Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Data Transport
MOST currently offers a band-width of 22.5 Mbits/s. In the next generation, the bandwidth will be increased to 50 and then later to 150 Mbits/s (as of approx. 2002).
In order to meet the different requirements of the applications regarding data transport, each MOST message is divided into three parts:
- Control data
- Asynchronous data: e.g. navigation system, arrow representation
- Synchronous data: e.g. audio, video signals
The control data controls the functions and devices in the network. The information can be compared to CAN bus data.
The control data has a band-width of 700 Kbit/s. That corresponds to around 2700 messages per second.
For the data transmission of synchronous and/or asynchronous data, there is a total of 60 bytes. The limit is variable: e.g. 20 bytes of synchronous data and 40 bytes of asynchronous data.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.