Overview. This o-ring kit is already included in our W123, W126 and W116 Sanden Compressor Upgrade Kits. R-134a requires HNBR o-rings throughout the system. Note that W123 and W126 A/C fittings and hoses are SAE sizes, not metric.
Fitment
- W123 and W126 with a Klima Sanden Compressor Upgrade Kit only. Not for stock (Delco R4) systems.
What’s included
- Complete HNBR o-ring set




