You really need to read the codes to see what is going on, but charge pipe wouldn't surprise me. I've also had an intermittent issue that sounds kinda like yours with longer starting times and the half engine limp mode. It throws a code for fuel rail pressure so my HPFP might be going out
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2011 BMW 135i ///M-Sport, DCT
Bilstein B12 kit, Dinan camber plates, M3 front control arms, Whiteline poly RSFB, MHD Stage 1, cp-e Charge Pipe, H&R Front sway bar, BMW performance diffuser
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