Forester DPF replacement

Has anyone changing a diesel Forester's DPF experienced problems with a non-Subaru supplier part?  When changing out the DPF I removed the heat shields, pressure pipes & temperature probes from the old unit, refitted the pipes onto the new unit and when I screwed in the first temp probe at the front of the DPF I heard a crack.  I removed the probe and discovered that it had bent and broken.  I carefully screwed the other one into the same hole and as soon as I felt any resistance I looked inside the DPF with a torch and discovered that the tip of the probe was making contact with the core of the DPF before it was seating on the thread.