Last post on Jun 10, 2013 at 3:37 PM
You are in the BMW M/M3/M6
What is this discussion about?
BMW M3, Coupe, Convertible
Jan 08, 2009 (2:45 pm)
Perhaps this is of interest?
Engine Electrical Systems
12 04 00
Woodcliff Lake, NJ
Secondary Air System Faults
All models with M52 and S52 engine
All models with M44 engine produced as of 1/97
All models with M62 engine produced as of 9/98
All models with M73 engine
Customer complains that the "Check Engine" lamp is illuminated and the following fault is set in the Engine Control Module (ECM/DME):
M52, S52 Engine:
Fault code 245 (F5 hex) - Secondary air injection, bank 1
Fault Code 246 (F6 hex) - Secondary air injection, bank 2
Fault code 80 - Secondary air injection, bank 1
Fault Code 81 - Secondary air injection, bank 2
M44 & M73 Engine
Fault Code 80 - Secondary air injection system
Failure within the secondary air injection system.
The following diagnostic tips / steps should be followed if the above customer complaint is received:
1. For E36 vehicles equipped with M52 engine prod. 10/95 - 2/96 also refer to S.I. 12 04 96 regarding Recall Campaign No. 96E-A01.
2. Refer to the OBD II training manual for illustrations and explanation of system operation.
3. Perform test modules/component activation of secondary air system located in the "Service Functions" section using DIS/MoDiC.
4. Check operation of secondary air pump using instructions provided in DIS/MoDiC.
5. If pump is not operating correctly check air pump relay. For vehicles with M52 engine a modified relay was introduced into production P/N 12 63 1 742 690.
6. If the relay is operating correctly and the electrical connections/wiring to the pump are OK, check the condition of the pump.
7. If the air pump is seized it must be replaced.
Important note :If the pump is seized as a result of moisture (water in pump), an improperly operating non-return valve is the cause. The non-return valve may stick open and allow exhaust gases to condense within the air pump housing leading to a failure of the pump.
Non-return valve sealing / leakage check:
The non-return valve must be checked as follows any time a seized secondary air pump has been replaced due to moisture.
Disconnect the air pump feed line/hose at the non-return valve (line from the secondary air pump to the non-return valve).
Visually inspect the non-return valve fitting internally for carbon type contamination. (Twisting the corner of a clean shop rag into the valve fitting as shown will assist with this check.)
If no carbon type deposits are found on the rag, this indicates that the non-return valve is sealing correctly and does not need to be replaced.
If carbon type deposits are found on the rag, the non-return valve is not sealing correctly and must be replaced.
Note :A non-return valve which is not sealing correctly will cause damage to the secondary air pump as described above.
8. Check also for cracked vacuum lines going to the non-return valve.
-- For vehicles with M44 engine the vacuum line P/N 11 73 7 501 180 going to the non-return valve has been improved since 11/98.
-- For E46 323i/iA and 328i/iA vehicles produced 4/98 - 7/98 see S.I. number 12 04 98 regarding the vacuum hose to the secondary air non-return valve service action.
#202 of 250 Re: [Mr_Shiftright]
Jan 08, 2009 (4:35 pm)
there's no doubt bmw is an amazing performance machine combine with comfort in a reasonable price. But I'm starting to wonder if the complain from others that is not as relaible with multiple electrical/mechanical issue is really true
Thanks for the info
if you ever finds any DIY diagram or photos of the air pump or relay, I would appreciated.
#203 of 250 Re: 2002 - 2003 M3 Reliability? [Mr_Shiftright]
Jan 09, 2009 (9:37 am)
found this old thread as I am looking at purchasing m3. what is the problem with titles from NH? just curious as I am in new england
#204 of 250 Re: 2002 - 2003 M3 Reliability? [jd1971]
by MrShift@Edmunds HOST
Jan 09, 2009 (9:50 am)
Oh some states in the past developed a bad reputation for being very loose with their title requirements, allowing out-of-staters to "launder" salvage titles for real ones.
I really don't know if these loopholes have been corrected or not. I'm just so used to being on alert with titles from New Hampshire and Alabama that I remain on high alert when I come across one.
Didn't mean to alarm you! Best thing for you might be something like
#205 of 250 2005 bmw m3 problems?
Jan 13, 2009 (9:45 am)
I am thinking about buying a 2005 BMW M3 fully loaded with navigation with 48,100 miles. I was wondering if there are any known reported repair problems with this vehicle? The 2008 Consumer Reports Buying Guide saids it is a used vevicle that should be avoided. It reports transmission, electrical, power and suspension problems, but most of my internet research for the most part does not state anything like this.
#206 of 250 Re: 2005 bmw m3 problems? [nickyc1974]
by MrShift@Edmunds HOST
Jan 13, 2009 (10:16 am)
Here's a checklist for you:
3 Series Bugaboos
However, with those low miles I wouldn't think too many items on the list would apply, so you may be okay. What I'd do if i were you is download this list of areas of concern and show them to the shop that checks out the car for you, and let them inspect these items.
Some are minor, like valve cover leaks, and some don't apply to the M3, like the oil separator. Others might apply to low mileage, like the BMW power steering hoses, which tend to leak and which cost an outrageous amount of money for some reason.
Anyway, I'm not sure Consumer Reports has much of a handle on BMWs.
#207 of 250 M-Coupe Alignment
Feb 16, 2009 (12:07 pm)
I have 49000 miles on my M-coupe. I have worn out my rear tires twice (byproduct of my right foot) but my front tires are just now coming to the wear bars. I want to get an alignment, but fear not getting the M numbers right. Does anyone know the correct specs for an M-Coupe? Also, I've called the 2 tire shops that I typically send my customers to, and they both told me to see the dealer because of special tools etc. needed to perform the alignment correctly. Is that right?!?!
#208 of 250 Re: M-Coupe Alignment [Olds13]
by MrShift@Edmunds HOST
Feb 17, 2009 (8:33 am)
That doesn't make sense---well I mean indeed there may be special tools, but my experience has been that many many dealers farm out their alignments to specialists anyway. I don't see why a really talented alignment shop can't align just about any vehicle. My tire shop (who specializes in alignment) does Ferraris, Porsches, Bentleys, etc, as well as Hyundais.
A good alignment shop is not necessarily just a tire shop.
#209 of 250 Re: M-Coupe Alignment [Mr_Shiftright]
Feb 19, 2009 (5:43 pm)
BMW's alignment specs assume a certain weight in the passenger seat and the trunk. Some shops won't align them because they don't have any way to put the specified weights in the car. My indie tech uses a little Mom & Pop shop located in the back of an old industrial park. They don't charge much and they do absolutely first rate work.