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Discussion Starter #1 (Edited)
Noticed this last night. Pic taken from passenger front door side. The underfloor coating center piece (part #6) has come detached from the bar, with signs of major rust and corrosion.

I'm trying to determine and find what part that crossbar is on realoem and coming up empty. I'm guessing it's a structural component.

I don't have a lift to really get under it for a better look but these pics pretty much tell the story.

I'll still have to have the Indy do the work but I want to understand what's involved so I can have the conversation with him (and he lets me supply my own parts to save some $$).

Since the car was "born" in July 2008, should I try to go the way of BMW for the rust/corrosion warranty? I have a December 2017 report from the dealer when they did a full inspection while they had it in for airbag recall. This rust (which I'm sure did not develop in just a year) was not noted anywhere in the report.
 

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Looks like there was some mechanical damage there, no? Rust warranty will not cover damage ibpnduced corrosion....
 

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Discussion Starter #3
I don't recall ever driving it over something, so I'm not sure why I'm just now seeing the panel sort of peeling away. But the rust on the bar starts closer to the side of the car where that panel was not connected.
 

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I think mine is similar and I did not damage it. The road salt is bad but I do try and spray the under body every once in a while. This is a picture I took of water leak near the transmission that shows a bolt that fell off which causes the metal tray to hit the bar and cause clanking noise.

Let me know what happens.
 

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Discussion Starter #5
I found the video that the BMW tech sent me following last year's inspection. he did call out this panel appearing damaged, and one corner was hanging down. Now both rear holes have broken free that it's hanging lower.

I emailed the pic of the rust to the SA who sent me the video for his thoughts on warranty. To me, the bar rust is not related to the damaged panel at all, considering there are areas of corrosion nowhere near the attachment points of the panel.

Will see what he says.
 

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1. I believe the rust warranty requires 'through' rust.

2. Something had to damage that piece hanging down...the same 'thing' could have damaged the cross part.

I just dont see an SA going to bat with BMWNA over that.... good luck



In any event, havent seen that kind of corrosion since I lived in NY and PA.

;)
 

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Salt rust.

or

Some one must have gone over a steep speed hump and banged that spot


Doubtful any warranty would cover it.
 

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Discussion Starter #8
I***8217;m figuring the warranty angle won***8217;t go anywhere.

I***8217;m hoping the rusted bar can be cleaned up and treated for prevention of future corrosion. Then I would only need to replace the damaged panel, which I***8217;m finding in the $120-$140 price range.
 

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are u retarded? its surface rust underneath a car... have u never seen underneath an 11 year old car before? There are many components that rust underneath cars. Id be more concerned over what appears to be a trans leak.:rofl: Im so surprised anyone even entertained this with an answer, let alone at dealer which will laugh at you.
 

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are u retarded? its surface rust underneath a car... have u never seen underneath an 11 year old car before? There are many components that rust underneath cars. Id be more concerned over what appears to be a trans leak.<img src="http://s1.bimmerfest.com/forums/images/smilies/laugh.gif" border="0" alt="" title="ROFL" class="inlineimg" /> Im so surprised anyone even entertained this with an answer, let alone at dealer which will laugh at you.
I asked. It turns out to be AC condensation as the leak was clear and no smell. Turned off AC for a drive and no leak.
 

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Discussion Starter #11
are u retarded? its surface rust underneath a car... have u never seen underneath an 11 year old car before? There are many components that rust underneath cars. Id be more concerned over what appears to be a trans leak.<img src="http://s1.bimmerfest.com/forums/images/smilies/laugh.gif" border="0" alt="" title="ROFL" class="inlineimg" /> Im so surprised anyone even entertained this with an answer, let alone at dealer which will laugh at you.
Gee thanks. It***8217;s nice to have helpful answers here. It***8217;s responses like yours that make this such a helpful community (NOT). Aside from some bolts, my undercoating has very little rust after being driven in the Northeast for 10 years. The rust on this component seems to be more advanced than just surface rust, hence my question about if it***8217;s a structural piece or not.
 

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Discussion Starter #12
I've decided to replace the panel and this rusted bar. I got a closer look and it's got holes rusted through. I've been scouring the realoem diagrams for this model (2008 E70 3.0) and cannot for the life of me find the part number. Anyone know how to find it (or what is it?)

 

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I've decided to replace the panel and this rusted bar. I got a closer look and it's got holes rusted through. I've been scouring the realoem diagrams for this model (2008 E70 3.0) and cannot for the life of me find the part number. Anyone know how to find it (or what is it?)

Is the panel damaged? It doesn't look like there's anything wrong with the panel in the picture?
 

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Discussion Starter #16
The back of it is peeled down a good bit, and the holes for the bolts are badly chewed up (pics attached).

I found a used one for $85 that's in good shape that I will use as replacement. Also ordered new clips/screws to mount it.

My bigger concern is the bad rust on the cross member bar that supports the gearbox. Hoping maybe I can just sand/cleanup the rust and then apply some protection to it. I haven't fully been under the car yet - waiting for a new jack and stands next week. Then I'll remove the bad plate and hope the rust issue is isolated to just that area around the bolts that hold the plate.
 

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Yikes, that does look like it needs replacing. Mine look fine but one of the screw heads got rusted off so the screw is stuck in the bar. New screw won't fit in without extracting it and when I tried, no such luck. So I just got a ziptie to tied it to the bar and no more clanking.

Looking at the instructions to remove/replace the bar, you need to a transmission jack? https://www.newtis.info/tisv2/a/en/...ssion-mounting-automatic-transmission/QCnlmZc
 

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Discussion Starter #18
I***8217;ll clean up the rust, treat it and install the new panel. Then I***8217;ll have my Indy take a look. If he feels the bar is ok, I***8217;ll leave it.
 

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Found the same problem with my 2009 X5 E70 with 104000 miles, had the dealer put it on a lift and we looked at it, conclusion was the amount of rust it had didn’t justify replacing the brace unless I wanted it done.
Upon close examination I could see scraping of the rust proofing and paint was clearly caused by the metal shield being repeatedly shoved between the two screws, washers & the support brace.
Your brace looks to be far more rusted however. My metal shield is in better condition compared to yours. If mine had been as banged up as yours, I would have replaced it. I think when I do replace it I’m going to use stainless steel screws and washers as well. That’s my 2 cents. Glad you posted this. Thank you.


Sent from my iPad using Bimmerfest
 
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