Can I Replace Just the "bomb" actuator on the brake actuator?

Never once read of someone trying this...

Basically, you're asking about how to rebuild / repair the existing part rather than replacing it.

First step would be to diagnose what's failing, then the second step would be finding out if repair and perhaps recalibration is possible. With the price of used booster pumps at $1400 and in short supply it would make sense that an entrepreneur could make good money rebuilding old pumps if it was possible. So I encourage you to dive down the rabbit hole on this and see what's possible and report back to us!

I also encourage you to stay away from a "maniac" who hooks your car up to a computer and refers to a part of your braking system as a "bomb."

 

That cylindrical part is called the 'accumulator', and there is a thread around here somewhere where somebody found a source of similar accumulators and replaced just that part.

However, the odds aren't great of solving a problem that way, because even though the accumulator is where the pressurized fluid is held, when you are watching the pressure drop like that, the leakage can easily be elsewhere in the actuator assembly. The assembly contains a bunch of electromechanical valves and one of those is more likely to be the culprit.

The usual approach with a gen 2 would just be to replace the whole assembly.

 

Yes, but with used ones in short supply for $1400 for Gen2, it seems like somebody could make some serious money learning how to repair these? I suspect if it was easy it'd be done by now? I keep thinking of how I gave up on trying to repair a throttle position sensor because there was no easy way to calibrate it after the repair, for example...