HIGH PRESSURE FUEL PUMP Repair BMW N53 N54 N55 Engine

The X-ring must be tight fit on the spring type compressors 1.8mm thickness and 20mm inner diameter for the x-ring . Make sure it's tight fit(O-ring is prone to more issues).
The Oil Seal size is 22mm outer 11mm inner and 7mm wide.
Video on how to install completely immersed in oil:
   • HIGH PRESSURE FUEL PUMP REPAIR FOR 20...  

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Fuel plausibility too low
-Error code P0088
-11A002
-110001 - Cylinder injection cutout: Pressure too low in high-pressure fuel system.
-11A002 - High pressure fuel, plausibility Pressure too low.

DME shadow (inactive) codes -
11A401 - Fuel high pressure during fuel injection release: Pressure too low.
11B401 - Fuel high pressure or after enabling injection (2nd ambient condition set after delay): Pressure too low.
21A023 - Combustion engine: Unsuccessful start or engine stopped without driver influence.