[Dav3]

I'm facing a weird issue with the VSC-2 where it stops working after I drive the car

Symptoms are as follows:

- On cold engine and when starting car up, I'm able to open/close the valves through remote
- After driving 5-10 minutes or more, remote valve open/closed functionality stops working. Valves don't move and stay in whatever position selected on car start up
- When switching car off after a drive and turning it back on, valves only open/close on the left side (same place as where VSC-2 Box is)
- When starting the car in OEM Mode (ON=Valves Open/OFF=OEM Mode), after having driven the car, only left valve opens on Sport+ start-up

I initially thought it might have been a heat related issue as the aluminium wrapped cable wasn't routed under the heat shield but zip tied to the chassis. However, after putting the car on ramps and touching the cables, there wasn't enough heat to believe it may have been a problem.

Car is European, so with OPF and is running a Remus exhaust with link pipes up to the OPF. I've ordered another VSC-2 unit, thinking perhaps I got a faulty unit but I fear there might be another issue at hand.

Assuming it's not the VSC-2 unit being faulty, what could the issue be?

Is BMW ECU interfering with the VSC-2 as the result of OPF sensor? Did the notorious BMW software update in March that patched OBD flashing also tampered with aftermarket valve control modules? Or perhaps are the Remus exhaust valves faulty and with heat they aren't able to move?

Wondering if anyone else has had a similar issue and/or knows a solution?

Cheers!