Glow Plug error diagnosis.

[ninja_zx11]

Couple of weeks ago i got 4A4E glow plug error code on my 2009 X5 35D. Today i finally took the intake out.

Thanks sgrice for the write up and pics and it was really helpful!! The hardest part was undoing swirl motor electrical connection and egr temp sensor electrical connector.Like you i decided to take the throttle body out along with the intake.

Then i checked the resistance of all 6 glow plugs and all are showing around .4~.5 Ω.So to me it looks like glow plugs are fine and its the controller.I also tried to run rheingold test plan for the glow plug error code and it was saying that resistance values are not available for ceramic glow plugs.It was suggesting to change all 6 glow plugs and if error shows up again then change the glow plug controller.Its really strange that resistance values are not available??That's what rheingold was showing??Does it mean that checking the condition of ceramic glow plug by measuring its resistance is not a proper way?? I think glow plug controller is covered by CPO as my brochure says ' all control modules'. So at this point i am kind of stuck.what to do now?If i can somehow make sure that glow plugs are fine then i can take my car confidently to the dealer for repair under CPO.Suggestions please!!

Here are the pictures of my intake after 91000 kms.Round ports are showing signs of CBU just like sgrice's car and rectangular ports are absolutely clean with a very light film of oil.