Charcoal Filter Removal
Contributors
Joined: Feb 2006
Posts: 14,646
Likes: 0
From: NY
My Ride: 2008 Silverstone II E60 M5 2012 E70 AW X5 50i Sport w/ LCI Aero Kit and Rocker Panels
Originally Posted by Fedcaper' post='359836' date='Nov 23 2006, 05:47 PM
My filter is molded on. 
Members
Joined: Aug 2006
Posts: 2
Likes: 0
Dear Fellow Charcoal Filter Modifiers,
I took my filter out about a month ago. Improvement in idle, acceleration, and engine noise were all negligible as far as I am concerned. The 545i is a terrific performing car with or without the filter. The one thing I did notice was great fuel economy. I drove from Austin to Dallas two weeks ago on I-35 which is torture, and on the way up I stayed in the left lane and buried the throttle when the turtles would finally move over. I averaged over 70mph and got 27 mpg. On the way home I got tired of the hassle and followed some slow moving traffic. I averaged 62 mph and got a whopping 29 mpg. If I hadn't sped up at the end it would have been 30mpg. One final thing. Today my "service car soon" light went off. I checked the computer and it says the car's emissions are out of whack. Has anyone had this happen after taking their filter off?
I took my filter out about a month ago. Improvement in idle, acceleration, and engine noise were all negligible as far as I am concerned. The 545i is a terrific performing car with or without the filter. The one thing I did notice was great fuel economy. I drove from Austin to Dallas two weeks ago on I-35 which is torture, and on the way up I stayed in the left lane and buried the throttle when the turtles would finally move over. I averaged over 70mph and got 27 mpg. On the way home I got tired of the hassle and followed some slow moving traffic. I averaged 62 mph and got a whopping 29 mpg. If I hadn't sped up at the end it would have been 30mpg. One final thing. Today my "service car soon" light went off. I checked the computer and it says the car's emissions are out of whack. Has anyone had this happen after taking their filter off?
Contributors
Joined: Oct 2006
Posts: 752
Likes: 0
From: Seattle, WA
My Ride: 2006 525i Silver Gray/Gray Dakota Leather | Steptronic | Cold Weather | Xenon | Premium Package
Modifications:
M Aero Kit | Carbon Fiber Kidney Grill | K&N Air Filter | Charcoal Filter Removed | Radenergie R10 Silver 20" soon | kW coilover V3 | SprintBooster soon | M5 trunk finisher
Next planned mods:
?Hamann quad exhaust + Hamann quad rear diffuser + Hamann Front Lip?
Originally Posted by oeo' post='361185' date='Nov 27 2006, 02:22 PM
Dear Fellow Charcoal Filter Modifiers,
I took my filter out about a month ago. Improvement in idle, acceleration, and engine noise were all negligible as far as I am concerned. The 545i is a terrific performing car with or without the filter. The one thing I did notice was great fuel economy. I drove from Austin to Dallas two weeks ago on I-35 which is torture, and on the way up I stayed in the left lane and buried the throttle when the turtles would finally move over. I averaged over 70mph and got 27 mpg. On the way home I got tired of the hassle and followed some slow moving traffic. I averaged 62 mph and got a whopping 29 mpg. If I hadn't sped up at the end it would have been 30mpg. One final thing. Today my "service car soon" light went off. I checked the computer and it says the car's emissions are out of whack. Has anyone had this happen after taking their filter off?
I took my filter out about a month ago. Improvement in idle, acceleration, and engine noise were all negligible as far as I am concerned. The 545i is a terrific performing car with or without the filter. The one thing I did notice was great fuel economy. I drove from Austin to Dallas two weeks ago on I-35 which is torture, and on the way up I stayed in the left lane and buried the throttle when the turtles would finally move over. I averaged over 70mph and got 27 mpg. On the way home I got tired of the hassle and followed some slow moving traffic. I averaged 62 mph and got a whopping 29 mpg. If I hadn't sped up at the end it would have been 30mpg. One final thing. Today my "service car soon" light went off. I checked the computer and it says the car's emissions are out of whack. Has anyone had this happen after taking their filter off?
Contributors
Joined: Oct 2006
Posts: 752
Likes: 0
From: Seattle, WA
My Ride: 2006 525i Silver Gray/Gray Dakota Leather | Steptronic | Cold Weather | Xenon | Premium Package
Modifications:
M Aero Kit | Carbon Fiber Kidney Grill | K&N Air Filter | Charcoal Filter Removed | Radenergie R10 Silver 20" soon | kW coilover V3 | SprintBooster soon | M5 trunk finisher
Next planned mods:
?Hamann quad exhaust + Hamann quad rear diffuser + Hamann Front Lip?
Or maybe it was really his time to go for service? 
Members
Joined: Nov 2006
Posts: 129
Likes: 0
From: Northern Virginia
My Ride: Alpine White 2007 550i
http://www.m5board.com/vbulletin/showpost....p;postcount=105
The purpose of the filter, per that link, is to prevent backwash of tainted air from the intake into the environment. Whatever.
The purpose of the filter, per that link, is to prevent backwash of tainted air from the intake into the environment. Whatever.
Contributors
Joined: Oct 2006
Posts: 752
Likes: 0
From: Seattle, WA
My Ride: 2006 525i Silver Gray/Gray Dakota Leather | Steptronic | Cold Weather | Xenon | Premium Package
Modifications:
M Aero Kit | Carbon Fiber Kidney Grill | K&N Air Filter | Charcoal Filter Removed | Radenergie R10 Silver 20" soon | kW coilover V3 | SprintBooster soon | M5 trunk finisher
Next planned mods:
?Hamann quad exhaust + Hamann quad rear diffuser + Hamann Front Lip?
Seems like no one else is having that same problem after removing the filter