I gave up using rebuilt nippondenso compressors years ago. I occasionally can't avoid it and in those cases I only buy Denso rebuilts. A rebuilt for 600 when a new costs $800 is a foolish game of Russian roulette.

The issue of rebuilts with densos is rather unique. For most of their units the piston sealing is not accomplished with rings. They are teflon coated. The teflon coating is not rebuildable so a rebuilt is a compressor with all the wear of this critical element from its inception. I hope denso as the original manufacturer installs new pistons, but I wouldn't count on it.

Anyway the risk with the rebuilt is that after replacement for a POA problem or a external leak, one incurs a mechanical failure resulting in "black death".

Hirnbeiss has it pretty much inline on costs, we would probably sell the new compressor from a MB box for about $725 and would very likely install a new drier also. The whole repair cost depends ever so much on what the original failure was.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician