E70 35D Codes 4BDC and 4A14
 

Bought the 2010 X5 35D Xdrive about an year ago, bought one year drive train warranty. Few days ago codes 4BDC and 4A14 showed up. Took the vehicle to the dealer and they say BMW does not cover glow plugs and the intake manifold gasket. What use is a warranty worth about $2500 is worth if it will not cover these things. Any way I need to replace the intake manifold, glow plug on cylinder 6 and fuel injection pressure sensor. Need help with it can anyone on the forum please guide me o the links that show the items I need to repair/replace.

The intake manifold is actually pretty straight forward. I did it to replace all the vacuum lines which is something you should consider doing while in there. I actually just reused the gaskets as they were in good shape and haven't had any issues at all. As for the replacement of the other items, can't help you there but I'm sure someone will chime in.

I recently replaced all 6 glow plugs and their controller on our 2009 x5 35d. See my thread for details. ECS Tuning sells a kit that includes the 6 glow plugs (Bosch) controller (Beru) and all the intake manifold gaskets for $312.44.

I followed the great post on how to remove and replace the intake manifold by sgrice

Don’t even think about just replacing one glow plug. The majority of the labor is getting to the glow plugs. The small incremental labor/cost of replacing all 6 and the controller is a no brainer.

Funf Dreisig

Powertrain warranty is VERY limited. There is a reason this is the only policy they sell for cars out of the factory warranty....im sure you thought 'well, it might not cover everything, but hopefully I'll get lucky'. You didn't.


You need to replace the glow plug controller as well (when one GP goes it usually takes out the controller. Search, this is covered here or on Bimmerfest)..I see Funf has given you a good start.


How confident are you with the dealer diagnosis? Was this a full-blown, run all the diagnostics and test plans work up?? Or a 'read two codes and throw a $$ estimate and see if he bites' quickie?

Carly shows for me glow plugs as well for 3 cylinders! I was thinking to clean them at home and put back!

Sent from my SM-G900F using Tapatalk

Waste of time, IMO

For $300 or so, just replace


Would you remove and clean spark plugs??

The original code on our 2009 35d was P067F code — “Cylinder 6 Glow Plug Control Circuit High”
And it is pretty clear the the #6 glow plug was not working (left to right #1->6).

Glow plugs have almost no resistance — perilously close to 1 ohm — which is why they can heat up so quickly. And also why they are hard to check with an ohm meter. As it happens all 6 of my old glow plugs measure roughly the same resistance with a Klein multimeter. So it is very unlikely that my #6 glow plug was really the problem. BUT… the diagnostics for the glow plugs are read by/through the Glow Plug Controller. So it is much more likely that the “Cylinder 6 Glow Plug Control Circuit“ that was reading “High” was within the Glow Plug Controller itself. In other words, the controller was no longer telling the #6 glow plug to turn on.

FWIW the round connector on the left side of the glow plug controller houses a single +12V hot wire that is directly connected to the alternator.

Funf Dreisig

Thank you all, appreciate the help, to top it all my transfer case has also failed have to replace it will create a new post.

Are you going to close the loop on this thread/issue? Answer the questions, describe what happened ...how it was fixed...etc??????

I am still researching what to do with it, in E53 the chain replacement costs about a $300 and seems fairly easy. I may just do that on my transfer case. I will let you guys know what I end up doing I am going to take my time and do some research, a rebuilt E70 transfer case costs $1200 or so, don't know if I will do that, can get a used transfer case from a auto parts recyclers some offer 6 month warranty.

"Chain replacement"??????

That's a new one.

Yeah, maybe the transfer case actuator gear failed instead. Search for that replacement procedure, it's cheaper and might be the cause of your issue.

Found a video on Youtube for the E53 TC rebuild,
https://www.youtube.com/watch?v=FbZmmOphYw0&t=163s
The ATC700 for the E70 is not much different here is the list of changes
Transfer Box ATC700
The transfer box ATC700 is a further development of the ATC500 that was fitted in the
E53. The power is output via a chain to the propeller shaft to the front axle and apportioned
by a multi-disc clutch.
The torque transmission efficiency of the multi-disc package has remained the same
compared to the ATC500.
Only slight changes have been made compared to the ATC500.
• Installation position of coding resistor
• Optimized lifetime gear oil
• New ventilation system
• Transfer box control unit (VGSG).

Here is another video of interest

https://www.youtube.com/watch?v=TivwD8MTMWg&t=12s

Why do you think the chain has failed? Most likely cause of failure for these is the little plastic gear in the controller. This can be replaced for about $100; (seems like a lot for a little gear, but this is an aftermarket solution, and they clearly intend to make a good profit....but still way better than replacing the controller or the whole TC.)

Transfer case fluid change and adaptation cycle
 

I am happy to report that the problem got fixed with the transfer case fluid change that I did and took it to my local BMW mechanic who ran the adaptive cycle and the car drives much better and no shudders in slow tight turns under power. The plastic actuator gear may wear out sometime in the future, however, I can handle that myself. Thanks for all the information on the forum, it was a great help, thanks guys.

BMW suggested TC replacement for 5-6K, got lucky with the TC, changed the fluid and had a BMW shop run the adaptive cycle for the TC and the problem went away, no shudder, car runs like new. Have not changed the heater plugs yet.

Changed the fluid and had a shop run the adaptation cycle for the transfer case, problem solved