Seat Alhambra MOST Bus Fault

I had a similar problem with my Seat Alhambra. No sound, navigation dead, and a stack of error codes. For me, it was also related to the MOST bus system. Have you checked the individual control units connected to the bus?

How did you pinpoint which control unit was the problem?

It was a process of elimination. I couldn't do it myself, I don't have the equipment for in-depth car diagnostics or knowledge of the automotive protocol. A workshop diagnosed it, they used equipment to identify the defective unit by monitoring data transmission on the bus system. It's probably worth getting it checked professionally, that bus system is complex.

Ok, thanks for the input. I took it to a local shop with good car diagnostics knowledge. Turns out a control unit on the MOST bus was faulty, exactly as suspected. Cost me about 1000€ to get it sorted.