I FINALLY got my car back from BMW of Columbia after 33 days. Part of the repair was replacing a leaking one-way check valve to the brake booster which was causing the brake pedal to go rock hard overnight. My SA speculated that this was causing the tick-tick-tick in my car as the car rebuilt vacuum upon re-start. He told me that since the $300 repair (not covered under CPO for some reason) the car hasn't ticked. The REST of the delay was waiting for a part for the electric trunk release latch which STILL hasn't come in. This will be repair #4 for the tick-tick-tick. The exhaust valves have been replaced, but the heads were not. We'll see what we see.
2014 BMW i3 w/REX /Solar orange/ ACC and parking assist suites