I also have bucking - quick intermittment cut outs - all speeds and gears ( I have a manual) - all conditions - The dealer had it for 3 weeks and cannot get it to run properly or diagnose the issue - I also replaced the crankshaft sensor per advice I received here = My other mechanic stated that his software did indicate a few electrical component drop outs when the brief hesitation occurs - My additional mechanic thinks it could be a fuel pump issue - Folks here think it could be the camshaft sensor - NO codes or dash lights - The other dealer in town is now taking a stab at the issue - god only knows how long they will have the car!! 2015 120k