I do not know if this helps but there is an extended warranty for engine coils. I am not sure if this is what you are referring to. It is 8 yrs/unlimited miles. The service bulleting is below.
"SI B 12 24 05
Engine Electrical SystemsFebruary 2006
This Service Information Bulletin replaces S.I. B12 02 04 dated March 2005.
S54B32- Special Limited Ignition Coils Warranty of 8 Years/Unlimited Miles
MY '01, '02, '03 E46 - M3 coupe/convertible with S54 engine
MY '01, '02 E36/7 - M roadster/coupe with S54 engine
BMW has become aware of a potential problem that could affect the durability of Bremi ignition coils of certain MY' 2001, 2002, and 2003 BMW automobiles equipped with the Motorsport S54B32 engines. We estimate that only a small percentage of vehicles will actually develop a problem. Affected vehicles may have a Service Engine Soon light illuminated with misfire faults stored in the Engine Control Module (DME) and a rough running complaint.
In the event that the Bremi ignition coils of a 2001, 2002, 2003 E46 (M3 coupe/convertible), or 2001, 2002 E36/7 (M roadster, M coupe) with S54B32 engine exhibit the symptoms of failure indicated above, they should be replaced with the improved ERA part (PN 12 13 7 551 260). For ignition coils replacing instruction refer to RA 12 13 511 found in BMW TIS.
12 13 7 551 260
As a commitment to our customers, and to demonstrate our confidence in our product, BMW will extend the warranty of the Bremi ignition coils from 4 years or 50,000 miles to 8 years and unlimited miles.
The warranty extension for this component applies to the above listed models only and is transferable to any subsequent purchaser of these models.
This extended warranty is applicable to vehicles registered in all 50 states.
Warranty coverage for all other parts is not affected.
BMW will inform all affected owners of the above listed models of their extended Bremi ignition coils warranty. A sample letter is attached.
The following Warranty Information should be used if Bremi ignition coils replacement becomes necessary as outlined above:
12 13 93 14 00
Replace Bremi ignition coils. Includes deleting any
misfire fault codes stored in the Engine Control
00 54 124
11 FRU - E46 M3 with S54
8 FRU – E36/7 M roadster/coupe with S54
00 54 692
9 FRU – E46 M3 with S54
6 FRU – E36/7 M roadster/coupe with S54
Note: The following explanations spell out the correct use of the work times.
Use this labor operation number when the only repair performed is the listed warranty repair.
Use this labor operation number when other repairs or services are performed along with the listed warranty repair.
Under no circumstances should both labor operation numbers be claimed. Attempts to claim both times will result in an unnecessary delay in claim processing and payment."
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