Cleaning the MAF did wonders
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Joined: Sep 2008
Posts: 478
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From: Sherman Oaks CA (New to: Bay Area)
My Ride: 2004 BMW 545i Sport Package, Titanium Gray II Metallic, Wheel Style 124
anyone used this product... i notice they have Contact Cleaner with NO Residue and with Lubrication and if you drill in the page they have Cleaners and Degreasers
MG Chemicals Website
post your feed back on product... i seen this product at Fry's Electronic
MG Chemicals Website
post your feed back on product... i seen this product at Fry's Electronic
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Joined: May 2004
Posts: 2,863
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From: SoCal San Diego
My Ride: 545i Sport
Model Year: 2004
Engine: N62
Here's my DIY: Now with pictures (thanks Lomag)
-Disconnect MAF sensor harness. Loosen clamps with 1/4? nut driver.
-Unclip upper half of air box and lift carefully. Rotate upper half of air box 180 degrees.
Remove charcoal filter if present (Performance Improving Mod).
- MAF sensor is now accesible through the intake hole. Follow instructions on CRC MAF Sensor cleaner for use.
-Install housing back on, tighten clamp and re-attach harness.
-Disconnect MAF sensor harness. Loosen clamps with 1/4? nut driver.
-Unclip upper half of air box and lift carefully. Rotate upper half of air box 180 degrees.
Remove charcoal filter if present (Performance Improving Mod).
- MAF sensor is now accesible through the intake hole. Follow instructions on CRC MAF Sensor cleaner for use.
-Install housing back on, tighten clamp and re-attach harness.
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Joined: Aug 2008
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From: Originally from Koeln, Deutschland. Enjoying it in Bonita Springs, Florida Now :)
Originally Posted by BenAnd' post='838832' date='Apr 7 2009, 08:14 AM
Hi All 
Here is a "littel" DIY for a BMW E60/61 525IA.
Here is a "littel" DIY for a BMW E60/61 525IA.
Senior Members
Joined: Sep 2008
Posts: 263
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From: East Bay, CA
Originally Posted by jagbagri' post='836676' date='Apr 4 2009, 10:38 PM
Really easy DIY and yes you need Security T25 bit. I have cleaned it today, have not had the chance to drive around yet but the idle is much smoother. I have 41K miles. I'll see if you feel any difference in driving or in mpg tomorrow.
BUT Here is the BIG question:
While doing this I managed to droop the T25 bit in the engine bay, just around the sensor. I heard it go down, hit against the metal and finally a sound of it touching/resting on the plastic. I can't see it but I think it is resting on the bottom bay cover. I have not taken the bottom cover off to retrieve the wrench yet. I was going to go to my brother's place tomorrow who has better jack and jack stand to make it easier to work.
DO YOU think it is safe to drive about 60 miles before I can take the think off? Hopefully it would not jump around and catch in some kind of belt or any other mechanical part. What do you guys think?
BUT Here is the BIG question:
While doing this I managed to droop the T25 bit in the engine bay, just around the sensor. I heard it go down, hit against the metal and finally a sound of it touching/resting on the plastic. I can't see it but I think it is resting on the bottom bay cover. I have not taken the bottom cover off to retrieve the wrench yet. I was going to go to my brother's place tomorrow who has better jack and jack stand to make it easier to work.
DO YOU think it is safe to drive about 60 miles before I can take the think off? Hopefully it would not jump around and catch in some kind of belt or any other mechanical part. What do you guys think?
Has any body dropped any small parts (small wrenches, screws, bits etc.) in the engine bay and NOT found them? What kind of harm it can cause? or Am I worried for nothing?
Members
Joined: Aug 2008
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From: Kent, England.
http://www.louv.tv/cars/m5/MAF/
thats a handy write up.
On the 530d the MAF is on the LHS (looking from the front) under the engine cover. its on the intake manifold
thats a handy write up.
On the 530d the MAF is on the LHS (looking from the front) under the engine cover. its on the intake manifold
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Joined: Jan 2009
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Originally Posted by jagbagri' post='839178' date='Apr 7 2009, 09:44 AM
OK, I looked for the lost wrench (L shape wrench) but did not find any. I took off the bottom body cover (not only the oil pan cover but the whole plastic cover but did not find the wrench anywhere But I also notice there is a big metal cover right under the engine bay, just above the plastic cover. No wrench, I only HOPE it must have fell some where on the freeway, otherwise it is till laying somewhere at the bottom metal cover and in that case I can potentially still bounce around and cause some damage some day..
Has any body dropped any small parts (small wrenches, screws, bits etc.) in the engine bay and NOT found them? What kind of harm it can cause? or Am I worried for nothing?
Has any body dropped any small parts (small wrenches, screws, bits etc.) in the engine bay and NOT found them? What kind of harm it can cause? or Am I worried for nothing?
test
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Joined: Mar 2009
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From: SoCal- SFV (Land of pimps, drug dealers, money, hot cars and hot wimmenz...this ain't no movie bitch, mess with us and we'll cut ya!)
On the '08/'09s, the MAF is part of the upper lid of the airbox.
I went into mine and removed the charcoal filter and put the orange back in but the orange is not exactly a perfect fit which I thought was unusual. Perhaps the RPI filter will be a better fit.
Now, I loosened the clamp that holds the upper lid of the airbox to the intake tube but I was unable to work out of the intake tube so I could spray it down. Should I just tug on it a bit harder for it to come out?
I went into mine and removed the charcoal filter and put the orange back in but the orange is not exactly a perfect fit which I thought was unusual. Perhaps the RPI filter will be a better fit.
Now, I loosened the clamp that holds the upper lid of the airbox to the intake tube but I was unable to work out of the intake tube so I could spray it down. Should I just tug on it a bit harder for it to come out?
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Joined: Sep 2008
Posts: 478
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From: Sherman Oaks CA (New to: Bay Area)
My Ride: 2004 BMW 545i Sport Package, Titanium Gray II Metallic, Wheel Style 124
Originally Posted by x5driver214' post='840121' date='Apr 7 2009, 10:24 PM
wow I must try this. Does it feel any faster?
did the DIY two nights ago