04-16-2012, 01:40 AM
Join Date: Apr 2010
My Ride: VQ37VHR
***The Official M56 SULEV Warranty Documents, Check-in, and Questions Thread***
In this first post, I am including any important information I find for SULEV owners, regarding warranty, part compatibility, etc. The Air Resource Board approvals indicate a service life of exhaust and evaporative emissions components as being 150,000 miles.
I'm just curious how many M56B25 SULEVs are floating around on here. Put your mileage, engine modifications, tuning, driveline modifications (e.g. transmission, diff ratio), etc., along with any problems you've had with it (and whether or not BMW warrantied the issue). I have also posted the info sheet that dealers received regarding the SULEV.
FYI for anyone who does not know, the SULEV has a unique sealed fuel system of mostly stainless steel, and a stainless steel fuel rail. The tank, pump, filter, filler, and vent hose are all one piece and has to be replaced as a single unit. The SULEV's entire emissions system and fuel tank assembly is covered under a 15 year/150k mile warranty.
I have an '04 with 72k miles, an Active Autowerke tune, K&N panel filter, I got rid of the hydrocarbon filter in the lid of the air box, and I haven't had any issues aside from OFHG and cooling system. No M56 specific issues.
Attachment 1: M56 engine BMWNA information release to dealerships
Attachment 2: CARB M56 approval dated 2003 (indicates service life of 150k miles on evap/emissions equipment)
Attachment 3: CARB M56 approval dated 2004 (indicates service life of 150k miles on evap/emissions equipment)
Attachment 4: SULEV specific warranty handbook dated 2005
Last edited by briangl92; 04-25-2012 at 12:17 PM.